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Serving the lift industry since 1996
Operation and Installation Manual
Serving the lift industry since 1996
To find out more, visit our website
www.atwellinternational.comor call us on
+44 (0) 1905 641 881
Other Products available at Atwell International
VG Products • ELSCO Roller Shoes • Henning Load
Weighing Equipment • SASSI Machines • Bedplates • Machine Guarding
• Divertors • Overspeed Governors • Tension Weights
Sliding Guide Shoes • Guide Rails • Buffers • Compensation Chains
Atwell International LtdBall Mill Top Business Park Hallow Worcester WR2 6PD United KingdomTelephone +44 (0)1905 641881 info@atwellinternational.com
Copyright© Atwell International Limited. All rights reserved.
Applications and Layout Datafor the VG Range of Safety Gears
Version 3.0
Applications and Layout Datafor the VG Range of Safety Gears
Version 3.0
1 Atwell International Limited
Contents General Information ..................................................................................................... 2
Guidance Notes ............................................................................................................. 3
Over-speed governors
Governor rope attachment
Inertia spring
Guide rails
Carbide inserts
Rail lubricant
Ascending Car Upward Protection
Design Features ...........................................................................................................7
Accessory kits ..............................................................................................................8
Illustrations and Data Sheets
Figure TD1.0 Outline Data - VG Safety Gears .................................................. 10
Figure TD1.01 Maximum Rated Mass (P+Q) ..................................................... 11
Figure TD1.1 Standard Equipment - Kits SK1 and SK7 .................................... 12
Figure TD1.1 S2 Standard Equipment - Kits SK1 and SK7 .................................... 13
Figure TD1.2 Inertia Bracket Assembly - Kit SK2 ............................................. 14
Figure TD1.2 S2 Inertia Bracket Assembly - Kit SK2 ............................................. 15
Figure TD1.3 Auxiliary Inertia Spring Kit SK3 ................................................... 16
Figure TD1.4 Dual acting safety gears - indirect connection ......................... 17
Figure TD1.4 S2 Dual acting safety gears - indirect connection ......................... 18
Figure TD1.4.1 Duplex dual acting safety gears - indirect connection ............. 19
Figure TD1.4.1 S2 Duplex dual acting safety gears - indirect connection ............. 20
Figure TD1.4.2 Duplex dual acting safety gear - indirect connection .............. 21
Figure TD1.4.2 S2 Duplex dual acting safety gear - indirect connection .............. 22
Figure TD1.5 Duplex Operation - Kit SK5 ......................................................... 23
Figure TD1.6 Dual acting safety gear - direct connection .............................. 24
Figure TD1.7 VG-5 Bi-directional safety gear .................................................. 25
Figure TD1.7.1 VG5 with bi-directional Kit SK10 ................................................ 26
Figure TD1.7.1 S2 VG5 with bi-directional Kit SK10 ................................................ 27
Figure TD1.7.2 Combined safety gears .............................................................. 28
Figure TD1.8 Special Duplexed Four guide rail lift ......................................... 29
Figure TD1.8.1 Special Four guide rail lift general layout .................................. 30
Figure TD1.8.4 Special Four guide rail lift general layout .................................. 31
Figure TD1.9 Friction type Governor Forces ................................................... 32
Figure TD1.9.6 Governor and safety gear forces with KITSK10 ......................... 33
Figure TD1.10.1 Kit SK10 for combined VG-2a and VG-6 safety gears ................ 34
Figure TD1.10.1 S2 Kit SK10 for combined VG-2a and VG-6 safety gears ................ 35
Figure TD1.10.3 Kit SK10 with dual acting safety gears ....................................... 36
Figure TD1.10.3 S2 Kit SK10 with dual acting safety gears ....................................... 37
Figure TD2.8 Tripping Speed Versus Breaking Distance ................................. 38
Figure TD7.2 Tripping Speed versus Braking Distance - Year 2011 ................ 39
Figure TD8.3 VG8 Down Acting Safety Gear .................................................... 40
Figure TD8.4 VG8 Bi-Directional Acting Safety Gear ...................................... 41
Figure TD8.5 VG8 Bi-Directional Acting Safety Gear ...................................... 42
Safety Gears Special Projects ..................................................................................... 43
Solutions Using VG Safety Equipment ........................................................................ 44
EN81-20/50:2014 (Compliance) .................................................................................. 45
VG Range of Safety Gears Version 3.0 2
General Information VG safety gears consist of a pair of end assemblies which can bolt directly to the buffer channels or car frame. However, the top plate of the safety gear must be supported by an intermediate mounting plate if the distance between the car frame supports is too great. The maximum unsupported distance and the principal dimensions of the VG range are shown in Figure TD1.0. All channels and/or support plates must extend the full depth of the safety gear top plate (see figure TD 1.7.2)
Each end assembly has two spring loaded linkage mechanisms which carry and engage the gripping elements. The linkage mechanisms are designed to centralise the safety gear when it is engaged. This feature, in conjunction with large running clearances, means that VG safety gears can be used with spring loaded roller guide shoes, sliding shoes or solid rollers.
The force needed to operate a pair of downward acting safety gear end assemblies is approximately 30 Newtons (disregarding the force of any torsion springs fitted) and several pairs can be operated by a single over-speed governor. The actuating arm may be mounted on either side of the safety gear depending on the location of the over-speed governor. The end assemblies are connected together by a screwed rod for easy and accurate synchronisation of the end assemblies.
The force needed to release the safety gear is also very low. This enables the safety gear to be disengaged by the lift machine and not to require special lifting tackle.
The braking force is controlled by the compression of the spring stacks. These are adjusted in accordance with the certification tests carried out by BSI. Tests were carried out on guide rails with a superior surface finish as this represents the best practice in modern guide rail technology. If the safety gear is used on rails with a standard finish, or if used with a mass different from that shown on the label, the braking force may need to be adjusted on site. (See relevant installation and adjustment data)
To comply with the harmonised version of EN81, a lift must prevent “uncontrolled upward movement”. As all VG safety gears can be inverted to brake in the upward direction, code compliance can be obtained by fitting separate “upward acting” safety gear in tandem with a standard “downward acting” safety. This additional safety can either be attached directly to the downward acting safety gear or mounted separately on top of the crown channels. The VG range of safety gears can also be used as the braking means and as a complete solution to EN81-20/50:2014 when used in conjunction with the VG Overspeed Governor.
The VG-5 safety gear is bi-directional safety gear and has two independent braking mechanisms within a common housing. Both bi-directional and “combined” safety gears can be operated from a single friction type, bi-directional over-speed governor.
VG-2a, VG-5 and VG-6 safety gears have a common footprint and mounting dimensions. The VG-4 has a narrower footprint more suited to smaller lifts. The VG-4 can be fitted with an extended shaft to match the rest of the VG range.
2.1 Over-speed governors
VG safety gears can be operated by either “friction“or “drop-jaw” type overspeed governors. However, when bi-directional operation is required, either a bi-directional VG governor or friction governor capable of operating in both directions is required.
These governors have different operating characteristics which must be considered when deciding on which type of governor is best suited for a specific application. The preferred option is to fit a VG governor as this is technically superior to friction types.
Regardless of which type of governor is fitted, EN81 requires that it must generate twice the force needed to engage the safety gear. This must include the force needed to centralise the lift car prior to engaging the safety gear plus the inertia spring force.
Guidance Notes
3 Atwell International Limited
Guidance Notes 2.1.1 Friction Governors
These governors can operate in both directions and hence can be used to detect an over-speed in either the “up” or “down” directions. They operate by locking the governor wheel using a latch which engages when the governor reaches a specific speed. The force generated by the governor will depend on:-
1. The governor rope tension. This is controlled by the tension weight, the size of the governor rope and the length of travel. (refer to section TD1.9 for design formulae)
2. The travel of the lift car. As stated above, this can become a major factor in the governor force generated in both directions of travel.
3. The groove profile of the governor. Normally these are “V” grooves.
4. The rope speed over the governor wheel. The higher the speed, the lower the force generated by the governor. However, manufacturers do not produce any data for this reduction.
5. The direction of travel. The governor generates a much higher force in the “down” direction than in the “up” direction. (refer to section TD1.9 for design formulae)
Despite the above, friction governors are very popular because of their low-cost and bi-directional properties. However, they will reset following a safety gear test if there is counterweight “bounce” after the lift car has come to rest. In turn, the safety gear can be released thereby permitting the car to start downwards again if the machine brake is held open.
Counterweight “bounce” will occur if the car deceleration is too severe or the
overall compliance of the lift installation is too soft.
However, it should be noted:-This cannot happen under the “free fall” conditions which both safety gears and governors have been tested and certified.
2.1.2 VG Drop Jaw Governor
This governor uses digital technology for speed measurement and has a built-in control system for detecting uncontrolled movement and overspeed in the “up” direction. When triggered, a drop-weight is released which operates a linkage system to clamp the governor rope between spring loaded jaws. The governor force generated depends on:-
1. The spring force in the clamping jaws. Four compression springs are fitted as standard but these can be increased to six if required.
2. The speed of the rope passing through the gripping elements. As with a friction type, the higher the speed, the lower the force generated. Use is made of the speed versus friction coefficient given in EN81 to determine the minimum braking force.
3. The groove profile of the gripping elements. The standard groove is semi-circular with a 50% undercut. The undercut can be increased to either 63% or 75% to increase the braking force.
As the gripping force does not depend on the governor rope tension, a lighter tension weight can be used than on friction type governors. However, this must have an integral lock-down mechanism to react the force generated in the “up” direction.
Regardless of any car or counterweight “bounce”, a drop-jaw governor will keep the safety gear fully engaged after it has operated.
Drop jaw type governors are considered more reliable and are the preferred option over friction types.
VG Range of Safety Gears Version 3.0 4
Guidance Notes 2.2 Governor Rope Attachment
The total movement of the actuating arm to fully engage a VG safety gear is 44 mm. The first 30 mm brings the jaws into contact with the guide rail and braking commences during the final 14 mm.
The governor rope can be attached either directly to the actuating arm or indirectly via an anchorage bracket bolted to the car frame as per accessory kits SK2 and SK10.
a) If the governor rope is attached directly to the actuating arm, the maximum force from the governor must not exceed 300 Newtons. If the force is greater than 300 Newtons, then accessory kit SK3, or similar device, must be fitted to avoid damage to the actuating arm. (data sheet TD1.3)
b) The preferred governor connection is via accessory kits SK2 or SK10. (see data sheets TD1.2 and TD1.10) These have been designed to operate with governors producing a force between 300 and 600 Newtons (maximum 900 Newtons) and to limit the vertical movement to 44 mm.
As the force produced in the “down” direction by a friction governor is nominally five times that in the “up” direction, these accessories may need strengthening if double acting safety gears are used. If a customer prefers a friction governor, stronger versions of the kits are available to special order.
However, the accessories are ideally suited for the VG digital governor as this produces the same force in both “up” and “down” directions.
2.3 Inertia Springs
To ensure the safety gear does not operate during normal lift service, a force is required to overcome the governor rope system inertia. This force is normally provided either by an “inertia spring” fitted to the safety gear or by a “bomb release” mechanism. For a bi-directional safety gear, two inertia springs will be required, one for the up direction and one for the down direction.
The governor must generate sufficient force to:-
a) Overcome the inertia springs
b) Centralise the safety gear against any lateral force Lx
c) Move the connecting linkage and accessory kits
d) Lift the gripping elements into contact with the guide rail.
According to EN81, the minimum force generated must be twice the sum of all these elements.
a) Inertia springs - Torsion springs are included as standard across the entire VG range to act as “inertia springs” and biasing springs when brake units are inverted for upward operation. Two strengths of spring can be fitted depending on the application.
Two light springs are recommended when a safety gear is used in the “up” direction and one on a “down” acting safety gear. These will produce a force of 100 Newtons in both up and down directions and hence are suitable for lift travels up to 40 metres.
These springs can be augmented by auxiliary inertia springs kits SK2 and SK3 can be fitted to increase the maximum lift travels up to 100 metres.
b) When used with roller guide shoes which may permit the lift car to “float”, the governor will have to overcome any lateral force Lx generated by a car imbalance.
c) The mass of the connecting linkages used in various accessory kits must be taken into account. This will increase the force needed to engage a “down” safety gear but reduce the force needed in the “up” direction.
5 Atwell International Limited
Guidance Notes d) The force needed to engage a “down” safety gear is approximately 15 Newtons per end assembly. The force to engage in the “up” direction is minus 15 Newtons when it is inverted. This force is deducted from the inertia spring force.
When duplexing VG safety gears, it may be necessary to reduce the number of torsion springs fitted to each end assembly. These can either be removed or left in place but disengaged.
A spread sheet program (4.3.1) is available for checking code compliance (by Atwell International) of different combinations of inertia springs and accessory kits.
2.4 Guide Rail Type
VG safety gears were type-tested using class one rails from SAVERA having with a super-brushed finish. These rails have a lower friction coefficient than standard machined guide rails. However, all VG safety gears can be used with rails having a coarser surface finish. To compensate for different surface finishes, the braking force can easily be adjusted on site should this prove to be necessary.
If the safety gears are to be used on existing guide rails, these may have become work-hardened and/or have developed a hard oxide coating. Under these conditions, it may be necessary to increase the clamping force to enable the carbide inserts to break through any hard surface.
2.5 Carbide Toothed Inserts
All current models of VG safety gears use a common carbide toothed insert. On both dry and lubricated guides, these have demonstrated a consistency of braking force and superior wear characteristics to conventional gib materials.
The inserts brake by a combination of sliding friction and shearing as the teeth grip the guide rail. The teeth produce 8 shallow grooves some 0.15 mm deep by 0.25 mm wide in the rail surface. Guided by the gib stabilisers, these grooves remain parallel to the rail front edge and can be easily dressed smooth using emery paper.
These grooves do not detract from the performance of either sliding or rolling guide shoes or reduce the braking force of VG safety gears.
The minimum life expectancy of a VG safety gear is 10 full-load, full-speed drop tests. However, it is recommended that after each safety gear test the inserts are inspected for any signs of damage or wear.
During a public demonstration at the Augsburg International Lift Exhibition in 2007, a VG-4 safety gear was drop-tested repeatedly at 2 m/sec over the same section of guide rail. After 150 tests, the grooves had increased to only 0.4 mm deep and there was no loss of braking force. After testing was discontinued, both the guide rail and inserts were still serviceable.
2.6 Guide Rail Lubricant
VG safety gears have been certified using different lubricants to determine their sensitivity to different types of rail lubricant. These include a mineral oil to ISO grade 68, an extreme pressure gear oil and a 15-50 multi-grade engine oil. Tests have also been carried out using other oils and greases on a hydraulic test rig with different braking materials.
As a result of these tests it has been confirmed that VG safety gears are insensitive to the grade of oil used. Furthermore, there is no significant braking difference between lubricated and non-lubricated guide rails.
A reduction of up to 25% of the braking force may be encountered when the carbide inserts operate on high alloy steels lubricated with grease. Consequently, a down-rating of the braking capacity of the safety gears must be allowed for when used on special applications involving high alloy steels lubricated using grease.
VG Range of Safety Gears Version 3.0 6
Guidance Notes 2.7 Ascending Car Over-speed Protection
All VG safety gears can be inverted to operate in either the “up” or “down” directions. To comply with EN81, a lift manufacturer can choose either:-
a) Separate Safety gears
One safety gear is used to brake in the “up” direction and an additional and separate safety gear used to brake in the “down” direction. The safety gears can either be combined in tandem below the lift car or alternatively, mounted separately with the “upward” braking safety gear fitted to the crown channels.
Examples of the different methods of combining “up” and “down” safety gears are illustrated in figures TD1.4 to TD1.6. Examples of safety gears mounted in tandem below the lift car are illustrated in figures TD1.10.1 and TD1.10.2.
The preferred arrangement is to have the “downward” safety gear mounted below the car and the “upward” acting mounted onto the crown channels. Mounted in this way, the safety gears are inherently stable and the loads imposed on the holding down bolts are low.
When combining safety gears below the lift car it is recommended that the flanges of the buffer channels be strengthened by fitting an adapter plate between the buffer channels and the safety gear. This is suitable for a maximum (P+Q) of 4500 kg. At higher loads, additional bracing will need to be incorporated and technical assistance from Atwell International must be obtained.
b) Bi-directional safety gear
The VG-5 is a bi-directional safety gear and is illustrated in Figures TD1.7 and TD1.7.1. Essentially it combines two braking elements within a common housing. One mechanism is designed to brake in the “up” direction and the other in the “down” direction. Normally the VG5 should only be fitted below the lift car. If required to be mounted above the lift car, technical assistance from Atwell International must be obtained.
It is recommended that the VG-5 is mounted onto an intermediate adapter plate as per TD1.7.2 in order to strengthen the flanges on the buffer channels.
Regardless of whether separate safety gears or a bi-directional unit is used, the Braking Force needed in the “up” direction is substantially less than that required in the “down” direction. The braking force required to decelerate a lift car at 0.5g in the “up” direction is approximately half that required in the “down” direction. All bi-directional and combined safety gears are adjusted to generate 50% braking force in the up direction.
Both separate and bi-directional safety gears can be operated by a single friction type governor. However, to generate sufficient force in the up direction, the mass of the governor rope tension weight may need to be increased. Furthermore, it should be fitted with a “lockdown” device to prevent it losing tension. A lock-down kit for attachment to a standard tension weight is available. See accessory kit SK8.
2.7A Duplexing VG safety gears
VG safety gears were designed to stack together or “duplexed”. This could be in the form two “down” units (TD1.4.1/2) or one “up” and one “down” (TD1.10.1/2).
When two “down” brake units are duplexed, the total number of torsion springs fitted must be checked using the spread sheet program TD-4.3.1 (Atwell International). Furthermore, additional bracing may be required to ensure stability of the two brake units in both planes. (see TD1.5)
7 Atwell International Limited
2.8 Environmental Protection
VG safety gears have been designed to operate in a benign environment and exposed to temperate climatic conditions. Consequently, environmental protection is achieved by zinc plating to a commercial standard, chemical blacking or by painting.
Should the safety gear be required to operate under more severe climatic conditions, then special finishes may be required and these are available to special order. All special operating environments should be brought to the attention of Atwell International.
1. 6 mm running clearance both sides - suitable for roller guide shoes or sliding shoes
2. Certified for both lubricated and dry rails on class one guide rails.
3. All single models can be duplexed to double their braking capacity.
4. VG safety gears can be inverted to prevent “upward falling”. Either tandem mounted or separately mounted.
5. Special “dual acting” safety gear for upward and downward protection.
6. “See through” design for ease of inspection and maintenance.
7. Surface mounted for ease of design and installation.
8. Large running clearances between safety gear frame and guide fixings
9. Simple and accurate braking force adjustment to suit on-site conditions.
10. Rail widths 9 to 19 mm as standard - other widths to special order
11. Special configurations accommodated by means of accessory kits
12. Low operating force – up to 8 end assemblies can be operated by a single friction type governor.
13. Technical support by Atwell International.
14. Non-handed and universal design
15. Low release force after engagement
16. Common mounting across complete VG range.
17. Common spares on critical components across range.
The VG range was re-certified in 2013 and in 2018 to the latest EN81 requirements:
a) To harmonise the maximum governor tripping speed across the range. All VG safety gears with toothed inserts can now operate at a maximum governor tripping speed of 5m/sec*.
b) To restrict the disc spring compression to 75% of its maximum value. This will permit harmonisation of the load ratings between the ANSI and EN81 codes.
c) To allow different values of (P+Q) at different governor tripping speeds. The entire range can now benefit from the enhanced braking effect at lower operating speeds.
d) To have common values of (P+Q) for lubricated and non-lubricated guide rails. The previous minor rating differences between lubricated and non-lubricated guide rails have been eliminated.
The revised “down” ratings for the range are shown in the table on the next page. *except for the VG8
Guidance Notes
Design Features
VG Range of Safety Gears Version 3.0 8
The modular nature of the VG range means that several different mounting arrange-ments are possible by selecting from a range of accessory kits. The following is a list of the kits currently available. The diagrams show typical assemblies using standard kits.
Atwell International can provide technical assistance to lift manufacturers on special applications. For example, figure TD1.8 illustrates a special car lift arrangement on a four guide system. This required double-duplexed VG safety gears in the down direction and single VG safety gears in the up direction.
SK1 Standard Operating Kit - Figure TD1.1
This kit comprises of the actuating arm, transfer arms and clevis assemblies needed to operate a standard downward acting safety gear. It should be noted that the connecting rod between pairs of safety gears and the actuating rod is normally supplied by the car manufacturer but can be supplied to special order.
SK2 Inertia Bracket Assembly - Figure TD1.2
This is used for an indirect connection between the safety gear actuating rod and the governor rope. The position of the governor rope is offset by 61 mm from the actuating rod.
The bracket is used only with downward acting safety gears which require a car-top connection. It must be bolted to the car sling as illustrated. The assembly does not include the connecting rods or wedge sockets (kit SK9) as standard although these are available to order. The bracket has an auxilliary inertia spring to increase the maximum lift travels up to 75 metres.
SK3 Auxiliary Inertia Spring Assembly - Figure TD1.3
These are used:-
1.To balance the mass of the connecting linkages on various applications such as TD 1.4, TD 1.6 and TD 1.8.
2.To oppose the force exerted by the governor on the safety gear linkage and operating arm. This is done by adjusting the stop springs inside the spring assembly
3.To provide an auxiliary inertia force on lifts with long travels when the torsion springs may not provide a sufficiently high force.
The spring assembly bolts directly to the safety gear as illustrated in TD1.3. There are two versions of this kit. The standard version SK3 is suitable for all safety gears fitted with normal length connecting shafts. (refer to dimension “C” in figure TD1.0) However, safety gear VG-4 can be fitted with an extended shaft to enable it to work with the VG-2a for upward movements. The kit for this is SK3E.
Notes: 1 The above (P+Q) loads are nominal values. These can be exceeded by a maximum value of 7.5% as permitted in EN81. 2 The above values of (P+Q) can be doubled when a safety gear is being used as an upward acting brake. 3 Duplexing of VG safety gears has been verified under drop test conditions to double the above ratings. 4 Non-standard rail widths (greater or smaller than 16 mm) are available to special order. 5 Safety gears can be used on guide rails other than Savera Class one. This may require some on-site adjustment to the braking force.
Design Features
Accessory Kits
Governor Speed
m/sec
Maximum Value of (P+Q) kg
VG-2a
VG-5
VG-6
VG6E
VG8
0.5
3850
2800
5600
5600
2789
1.0
3530
2630
5250
5500
1.5
3275
2490
4980
5260
2668
2.0
3010
2350
4690
5100
2546
2.5
2770
2210
4420
4900
2.63
2425
3.0
2545
2080
4160
4700
3.5
2340
1955
3910
4500
4.0
2130
1840
3680
4320
5.0
3970
9 Atwell International Limited
SK4 Pivot Bracket Assembly - Figure TD1.4
The pivot bracket is bolted direct to the car frame and is used to connect separate “up” and “down” safety gears requiring an indirect connection to the governor rope. The offset of 61 mm from the actuating rod is common with the inertia bracket assembly SK2. This bracket assembly can withstand a maximum governor force of 1200 Newtons.
It is recommended that the auxiliary spring kit SK3 is fitted to protect the operating linkage from being subjected to an excessive governor force.
The assembly is supplied with slotted link plates and clevises to connect top and bottom safety gears and the governor. The kit does not include the connecting rods or wedge sockets (kit SK9) as standard although these can be supplied if required.
SK5 Double stacking kit (duplexing) - Figure TD1.5
This kit is used to connect two safety gears working in tandem to double the load carrying capacity of the safety gear. Each kit comprises the additional clevises and linkages to enable the safety gears to be operated by a single governor.
When duplexing a pair of safety gears, only one standard operating kit SK1 and Switch kit SK7 will be provided for each duplexed pair.
SK6 Up-Down Connection kit - Figure TD1.6
Used to connect 2 sets of safety gears, one set fitted beneath the lift car to work in the down direction and the other mounted on the crown channels to work in the up direction. The kit includes the linkages and clevises to connect the separate “up” and “down” safety gears together. The kit does not include the connecting rod or wedge sockets (kit SK9) although these are available to special order.
It is recommended that the auxiliary spring kit SK3 is fitted to prevent the safety gear operating linkage from being subjected to an excessive governor force.
SK6C Combined Safety Linkage Kit - Figure TD 1.7
Actuating linkage for “combined” safety gears acting as bi-directional devices. Linkage kits are available for different combinations of VG safety gears.
SK7 Switch Kit
Safety switch, operating cam and fixings to connect to the safety gear. One kit is normally supplied for each set of safety gears.
SK8 Lock-down Kit
This is should be fitted to the tension weight used with all bi-directional governors to prevent it from lifting. The device is supplied with the fixing bolt to secure the unit to the tension weight but not for securing the device to the lift well or bracket structure.
SK9 Wedge Sockets
A pair of wedge sockets to suit 6-8 mm diameter governor rope.
SK10
This is a bi-directional version of kit SK2 but without an inertia spring. The kit is fitted with a balance spring to offset the mass of the connecting rod or link (provided by the lift manufacturer). The inertia spring force is provided by the torsion springs fitted as standard to VG safety gears.
The kit can be used for combined safety gears fitted below the car or with dual acting safety gears. Examples of different applications is given in Figures 1.10.1 to 1.10.3.
AK- 7 Bi-directional kit
A kit of parts for the VG-5 bi-directional safety gear. The kit includes the actuating kits, switch kits and torsion springs. The kit can also be specified for combined safety gears. These have different link plates to suit the different sizes of safety gear.
Accessory Kits
VG Range of Safety Gears Version 3.0 10
Figure TD1.0 Outline Data – VG Safety Gears – Year 2019 – Issue H
YEAR ISSUE
FIGURE NUMBER
OUTLINE DATA - VG SAFETY GEARSTD1.0
C A M E R O N D E S I G N - NORTHAMPTON ENGLAND
Wid
th
"C"
Acc
ess
ory
hole
s ce
ntr
es
Fix
ing c
entr
es
60
Slo
ts 1
7 w
ide
Opera
ting li
nka
ge c
an b
e m
ounte
d e
ither
side
"D"
"B"
Height
Face
of
guid
e r
ail
VG
-2a
370
900 k
g
186
25
115
176
70
MIN
IMU
M M
AS
S
SA
FE
TY
GE
AR
WID
TH
FIX
ING
CE
NT
RE
S
DIM
"A"
DIM
"B"
DIM
"C"
HE
IGH
T
SLO
T L
EN
GT
H
AC
CE
SS
OR
Y C
EN
TR
ES
328
77
DIM
"D"
DIM
"E"
VG
-4
270
700 k
g
370
VG
-6
2000 k
g
VG
-5
370
850 k
g
186
186
140 41
25
25
30*
99
115
144
225
176
70
70
45
328
328
238 61
63/1
61
77
200
56/1
68
MA
X (
P+
Q)
@ 1
m/s
ec
3500 k
g1810 k
g2405 k
g5400 k
g
MA
X (
P+
Q)
@ 2
m/s
ec
MA
X (
P+
Q)
@ 3
m/s
ec
3000 k
g1639 k
g2145 k
g4660 k
g
2550 k
g1477 k
g1900 k
g4000 k
g
RE
FE
R T
O D
AT
AS
HE
ET
TD
1.0
1
FO
R F
ULL L
OA
DS
PE
ED
EN
VE
LO
PE
125
100
100
Note
If d
ista
nce
betw
een s
upport
sis
gre
ate
r th
an D
im "
E"
pro
vide
additi
onal s
upport
pla
te b
etw
een
safe
ty g
ear
and c
ar
fram
e.
Max
dim
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26
5
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See T
D-1
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60 Face
of
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ail
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4 h
ole
s
4 Nominal
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41
41 *
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27
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AN
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117 (
127)
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TY G
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VG
5 VG
6*
MIN
IMUM
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S 90
0 kg
85
0 kg
20
00 k
g M
AX (P
+Q) @
1 m
/sec
35
30kg
26
30 k
g 52
50 k
g M
AX (P
+Q) @
2 m
/sec
30
10 k
g 23
50 k
g 46
90 k
g M
AX (P
+Q) @
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/sec
21
30 k
g 18
40 k
g 36
80 k
g W
IDTH
37
0 37
0 37
0 FI
XIN
G CE
NTR
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186
186
186
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ns o
n re
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11 Atwell International Limited
Figure TD1.01 VG8 Dimensional Drawing
25
35
93.50
13
137
57
180
200 4
34
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of g
uid
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275
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VG Range of Safety Gears Version 3.0 12
Figure TD1.1 Standard Equipment - Kits SK1 and SK7 - Year 2000 - Issue B
AC
TUAT
ING
RO
D B
Y C
AR
MA
NU
FAC
TURE
R
FAC
E O
F G
UID
E RA
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AC
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ARM
- 1
OFF
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PPLI
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R FR
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7
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IDE
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ATE213 (VG-4 is 168)
38/4
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-4 is
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CO
NN
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D =
DB
G -
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NK
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ATER
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AN
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NO
TE:-
BY C
AR
MA
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R
3 O
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ROVI
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LIED
AS
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ND
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DA
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G K
IT
-
SK1
1 O
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THRE
AD
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12 x
35
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TH E
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S
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D A
SSEM
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TO A
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TIN
G L
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GE
MA
NU
FACT
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R TO
LIM
IT M
OVE
MEN
T TO
44
mm
13 Atwell International Limited
21
3(
VG
-4 =
16
8 )
38
/ 4
3F
ace
of
gu
ide
ra
il to
C
/L o
f a
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atin
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od
Sw
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kit -
SK
-7
ST
AN
DA
RD
EQ
UIP
ME
NT
FO
R V
G S
AF
ET
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EA
RS
.
T
O P
RE
VE
NT
DA
MA
GE
TO
OP
ER
AT
ING
LIN
KA
GE
.
Gu
ide
rail
req
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pla
tes s
up
plie
d o
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A
CT
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TIN
G R
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BY
CA
R M
AN
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AC
TU
RE
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MO
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ST
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D T
O 4
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m
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oe
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VG
SA
FE
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AR
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K-1
KIT
P
RO
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ail
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SA
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Sw
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kit
SK
-7
22
B
TD
1.1
On
e o
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kit S
K-7
JA
E1
6 M
AY
20
11
NO
TE
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CE
SS
OR
Y K
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SU
PP
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D A
S S
TA
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Sta
nd
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it S
K-1
Se
e s
he
et
1 o
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fo
r d
ime
nsio
n in
form
atio
n.
BA
LL
MIL
L T
OP
BU
SIN
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S P
AR
K
AT
WE
LL I
NT
ER
NA
TIO
NA
L L
TD
HA
LL
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WO
RC
ES
TE
R
WR
2 6
PD
DE
SC
RIP
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N:
DR
AW
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NO
.
IS
SU
E N
O.
ISS
UE
NO
.
DA
TE
.
R
EV
ISIO
N.
INIT
IAL
.
SH
EE
T
O
F
DO
NO
T S
CA
LE
DR
AW
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.
FIN
ISH
:
MA
TE
RIA
L:
Te
l:
01
90
5 6
41
88
1
Fa
x:
01
90
5 6
41
29
8W
eb
: w
ww
.atw
ell
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rna
tio
na
l.c
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Em
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: i
nfo
@a
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llin
tern
ati
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al.
co
m
Figure TD1.1 Standard Equipment - Kits SK1 and SK7 - Year 2000 - Issue B – sheet 2
VG Range of Safety Gears Version 3.0 14
Figure TD1.2 Inertia Bracket Assembly - Kit SK2 - Year 2004 - Issue D
43150
AC
TUAT
ING
RO
D T
HRE
AD
ED M
12 x
35
MIN
BO
TH E
ND
S
2 H
OLE
S 11
DIA
BRA
CK
ET C
AN
BE
ROTA
TED
61
100
DIMENSION TO SUIT CAR DESIGN
SWIT
CH
KIT
- SK
7
4827
4 TO
GO
VER
NO
R RO
PE
213
INER
TIA
BRA
CK
ET A
SSEM
BLY
- K
IT S
K2
WED
GE
CLA
MPS
TO
DIN
153
15
61
INER
TIA
SPR
ING
76
38
TO S
UIT
6 -
8 M
M R
OPE
50
274
MO
VEM
ENT
OF
AC
TUAT
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RO
D
CO
NN
ECTI
NG
RO
D :
LEN
GTH
= D
BG
- 27
5 T
HRE
AD
ED M
12 x
35
MIN
BO
TH E
ND
S
38/4
3
STA
ND
ARD
OPE
RATI
NG
KIT
- SK
1
FAC
E O
F G
UID
E RA
IL
GO
VER
NO
R RO
PE
C
NO
TETH
IS A
PPLI
CATI
ON
USE
S TH
E FO
LLO
WIN
G K
ITS
MA
XIM
UM
GO
VERN
OR
FORC
E
1 O
FF S
TAN
DA
RD O
PERA
TIN
G K
IT
- SK1
1 O
FF S
AFE
TY S
WIT
CH K
IT
- SK7AC
CESS
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KIT
SK9
1 PA
IR 6
/8 D
IA W
EDG
E SO
CKET
S -
SK9
OPE
RATI
NG
FO
RCE
(45/
50 O
N V
G-3
)
1 O
FF IN
ERTI
A B
RACK
ET A
SSEM
BLY
- SK
2
OTH
ER S
IZES
AVA
ILA
BLE
BY C
AR
MA
NU
FACT
URE
R
BY C
AR
MA
NU
FACT
URE
R
40 N
EWTO
NS
MA
XIM
UM
900
NEW
TON
S
INER
TIA
SPR
ING
15 Atwell International Limited
BA
LL
MIL
L T
OP
BU
SIN
ES
S P
AR
K
AT
WE
LL I
NT
ER
NA
TIO
NA
L L
TD
HA
LL
OW
WO
RC
ES
TE
R
WR
2 6
PD
DE
SC
RIP
TIO
N:
DR
AW
ING
NO
.
IS
SU
E N
O.
ISS
UE
NO
.
DA
TE
.
R
EV
ISIO
N.
INIT
IAL
.
SH
EE
T
O
F
DO
NO
T S
CA
LE
DR
AW
ING
.
FIN
ISH
:
MA
TE
RIA
L:
Te
l:
01
90
5 6
41
88
1
Fa
x:
01
90
5 6
41
29
8W
eb
: w
ww
.atw
ell
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rna
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l.c
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: i
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llin
tern
ati
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co
m
S
K-i
Kit
Gu
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ra
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Gu
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ra
il
ge
ar.
Lift
ca
r.
VG
Sa
fety
SK
-7 K
it
Go
ve
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r ro
pe
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ed
ge
cla
mp
SK
-9
Kit
We
dg
e c
lam
p S
K-9
K
it
Ine
rtia
Bra
cke
t A
ssy.
SK
-2
Kit
Gu
ide
ra
il
Go
ve
rno
r ro
pe
Rig
id b
racke
t s
up
plie
d
& f
itte
d
by lift
en
gin
ee
r.
JA
E
2
DT
D -
1.2
INE
RT
IA B
RK
T A
SS
Y
17
MA
Y 2
01
1
6 /
8 W
ed
ge
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cke
ts
SK
-9
2
No
te.
Th
is a
pp
lica
tio
n u
se
s t
he
fo
llow
ing
kits.
On
e o
ff x
Sta
nd
ard
Op
ers
tin
g K
it
SK
-1O
ne
off
x S
afe
ty S
witch
Kit
SK
-7O
ne
off
x I
ne
rtia
Bra
cke
t A
ssy
SK
-2O
ne
pa
ir
Se
e S
he
et
1 o
f 2
fo
r d
ime
nsio
n in
form
atio
n.
Figure TD1.2 Inertia Bracket Assembly - Kit SK2 - Year 2004 - Issue D – sheet 2
VG Range of Safety Gears Version 3.0 16
Figure TD1.3 Auxiliary Inertia Spring Kit SK3 - Year 2009 - Issue DYEAR ISSUE
FIGURE NUMBER
TD1.3
NO
TE
TH
IS A
PP
LIC
AT
ION
US
ES
TH
E F
OLLO
WIN
G K
ITS
AC
TU
AT
ING
RO
D
1 O
FF
ST
AN
DA
RD
OP
ER
AT
ING
KIT
- S
K1
1 O
FF
SA
FE
TY
SW
ITC
H K
IT -
SK
7
BY
CA
R M
AN
UF
AC
TU
RE
RB
Y C
AR
MA
NU
FA
CT
UR
ER
OR
SP
EC
IAL O
RD
ER
2000 N
MA
XIM
UM
FO
RC
E
GU
IDE
SH
OE
AD
AP
TO
R P
LA
TE
Buffer
channels
SP
RIN
G A
DJU
ST
ING
NU
TS
ST
OP
NU
TS
SW
ITC
H K
IT -
SK
7
ST
AN
DA
RD
OP
ER
AT
ING
KIT
- S
K1
INE
RT
IA S
PR
ING
KIT
- S
K3
38 T
O 4
3
AC
TU
AT
ING
RO
D
213
RO
LLE
R G
UID
E S
HO
ES
213
IF T
HE
GO
VE
RN
OR
FO
RC
E E
XC
EE
DS
2000 N
EW
TO
NS
EN
HA
NC
ED
SK
1 A
ND
SK
3 K
ITS
SH
OU
LD
BE
FIT
TE
D
TH
ES
E C
AN
WIT
HS
TA
ND
A G
OV
ER
NO
R F
OR
CE
OF
6000 N
.
1 O
FF
AU
XIL
IAR
Y S
PR
ING
KIT
- S
K3
2009 D
C A M E R O N D E S I G N - NORTHAMPTON ENGLAND
AUXILIARY SPRING ASSEMBLY
17 Atwell International Limited
Figure TD1.4 Dual acting safety gears - indirect connection - Year 2010 - Issue EYEAR ISSUE
FIGURE NUMBER
CROWN CHANNELS
DUAL ACTING SAFETY GEARS - INDIRECT CONNECTIONTD1.4
1200 Newtons Maximum
ACCESSORY KIT SK9
C A M E R O N D E S I G N NORTHAMPTON ENGLAND
THIS APPLICATION USES THE FOLLOWING KITS
2 0FF STANDARD OPERATING KITS - SK1
I OFF PIVOT BRACKET ASSEMBLY - SK42 OFF SWITCH KIT - SK71 OFF WEDGE CLAMP KIT - SK9
2 OFF INERTIA SPRING KITS - SK3
AN ALTERNATIVE ARRANGEMENT FOR DUAL SAFETY GEARSIS TO USE ACCESSORY KIT SK10 - SEE SECTION TD-1.10.3
234
Guide shoe adaptor plate
50
GOVERNOR ROPE
274
213
200
WEDGE CLAMPS TO DIN 15315
2010 E
Buffer channels
PROVIDED BY CAR MANUFACTURER OR SPECIAL ORDER
140 Newtons TO OPERATE
"DOWNWARD" ACTING SAFETY GEAR
140 Newtons TO OPERATE
"UPWARD" ACTING SAFETY GEAR
CONNECTING ROD BETWEEN UPPER AND LOWER SAFETY GEARS
LINKAGE STOP NUTS
SK3 KIT USED AS LINKAGE BALACING SPRING
SPRING ADJUSTING NUTS
PIVOT BRACKET ASSEMBLY - SK4
4 OFF M12 CLEVIS ASSY
SUPPLIED WITH KIT SK4
STANDARD OPERATING KIT SK1
USE SK3 KIT WITHOUT SPRINGADJSUST STOP NUTS ONLY
2 TORSION SPRINGS REQUIRED PER END UNIT
STANDARD END UNITSFITTED WITH ONE TORSION SPRING
1200 Newtons Maximum
VG Range of Safety Gears Version 3.0 18
Figure TD1.4 Dual acting safety gears - indirect connection - Year 2010 - Issue E – sheet 2
2E
2
Se
e s
he
et 1
of 2
fo
r d
ime
nsio
n in
form
atio
n.
DU
AL
AC
TIN
G S
AF
ET
Y G
EA
RS
- IN
DIR
EC
T C
ON
NE
CT
ION
.
TD
- 1
.4
VG
SA
FE
TY
VG
SA
FE
TY
GE
AR
SK
-9 K
IT
GE
AR
Piv
ot b
racke
t a
ssy -
SK
-4
SK
-3 K
IT U
SE
D A
S L
INK
AG
E B
AL
AN
CIN
G S
PR
ING
SK
-1 K
ITS
K-1
KIT
Co
nn
ectin
gro
d.
JA
E
VG
SA
FE
TY
18
MA
Y 2
01
1
US
E S
K-3
KIT
WIT
HO
UT
SP
RIN
G
SK
-1 K
IT
A
DJU
ST
ST
OP
NU
TS
ON
LY
GE
AR
GU
IDE
RA
ILG
UID
E R
AIL
SK
-1 K
IT
VG
SA
FE
TY
GE
AR
Co
nn
ectin
gro
d.
BA
LL
MIL
L T
OP
BU
SIN
ES
S P
AR
K
AT
WE
LL I
NT
ER
NA
TIO
NA
L L
TD
HA
LL
OW
WO
RC
ES
TE
R
WR
2 6
PD
DE
SC
RIP
TIO
N:
DR
AW
ING
NO
.
IS
SU
E N
O.
ISS
UE
NO
.
DA
TE
.
R
EV
ISIO
N.
INIT
IAL
.
SH
EE
T
O
F
DO
NO
T S
CA
LE
DR
AW
ING
.
FIN
ISH
:
MA
TE
RIA
L:
Te
l:
01
90
5 6
41
88
1
Fa
x:
01
90
5 6
41
29
8W
eb
: w
ww
.atw
ell
inte
rna
tio
na
l.c
om
Em
ail
: i
nfo
@a
twe
llin
tern
ati
on
al.
co
m
19 Atwell International Limited
Figure TD1.4.1 Duplex Dual Acting Safety Gears - Indirect connection - Year 2010 - Issue BYEAR ISSUE
FIGURE NUMBER
C A M E R O N D E S I G N NORTHAMPTON ENGLAND
DUPLEX DUAL ACTING SAFETY GEARS - INDIRECT CONNECTIONTD1.4.1
GOVERNOR FORCE
1200 NEWTONS MAXIMUM
THIS ARRANGEMENT USES THE FOLLOWING
2 OFF SWITCH KITS - SK7
1 OFF DUPLEXING KITS - SK5
1 OFF PIVOT BRACKET ASSEMBLY - SK4
2 OFF AUXILIARY INERTIA KIT - SK3
2 OFF STANDARD OPERATING KITS - SK1
1 OFF WEDGE CLAMP KIT - SK9
2010 B
GOVERNOR ROPE
WEDGE CLAMPS TO DIN 15315
ACCESSORY KIT - SK9
234 TO CLEAR LINKAGES
274
213 rod centres
45 mm TRAVEL UP AND DOWN
"UPWARD" ACTING SAFETY GEAR
"DOWNWARD" ACTING SAFETY GEAR
200
50
M12 CLEVIS
PIVOT BRACKET ASSEMBLY - SK4
DUPLEXING KIT - SK5
SPRING ADJUSTING NUTS
LINKAGE STOP NUTS
KIT SK3 USED AS LINKAGE BALANCING SPRING
FIT ONLY ONE TORSION
SPRING EACH END. FIT
TO LOWER SET.
2 TORSION SPRINGS REQUIRED
ON EACH END UNIT
170 Newtons TO OPERATE
170 Newtons TO OPERATE
USE SK-3 KIT WITHOUT AUXILIARY SPRING
ADJUST LINKAGE STOP NUTS ONLY
ADDITIONAL BRACING IF REQUIRED.
SEE DATA SHEET TD 1.5
VG Range of Safety Gears Version 3.0 20
Figure TD1.4.1 Duplex Dual Acting Safety Gears - Indirect connection - Year 2010 - Issue B – sheet 2
2
SE
E S
HE
ET
1 O
F 2
FO
R D
IME
NS
ION
IN
FO
RM
AT
ION
D
UP
LE
X D
UA
L A
CT
ING
SA
FE
TY
GE
AR
S -
IN
DIR
EC
T C
ON
NE
CT
ION
.
JA
E1
8 M
AY
20
11
B
2
SK
-3 K
IT U
SE
D A
S L
INK
AG
EB
AL
AN
CE
SP
RIN
G.
TD
- 1
.4.1
DU
PL
EX
ING
KIT
SK
-5
RE
AR
VIE
W
rod
.C
on
ne
ctin
g
SK
-3 K
ITW
ith
ou
t b
ala
nce
sp
rin
gA
dju
st sto
p n
uts
on
ly.
Co
nn
ectin
gro
d.
BA
LL
MIL
L T
OP
BU
SIN
ES
S P
AR
K
AT
WE
LL I
NT
ER
NA
TIO
NA
L L
TD
HA
LL
OW
WO
RC
ES
TE
R
WR
2 6
PD
DE
SC
RIP
TIO
N:
DR
AW
ING
NO
.
IS
SU
E N
O.
ISS
UE
NO
.
DA
TE
.
R
EV
ISIO
N.
INIT
IAL
.
SH
EE
T
O
F
DO
NO
T S
CA
LE
DR
AW
ING
.
FIN
ISH
:
MA
TE
RIA
L:
Te
l:
01
90
5 6
41
88
1
Fa
x:
01
90
5 6
41
29
8W
eb
: w
ww
.atw
ell
inte
rna
tio
na
l.c
om
Em
ail
: i
nfo
@a
twe
llin
tern
ati
on
al.
co
m
21 Atwell International Limited
Figure TD1.4.2 Duplex dual acting safety gears - direct connection - Year 2011 - Issue A YEAR ISSUE
FIGURE NUMBER
C A M E R O N D E S I G N NORTHAMPTON ENGLAND
DUPLEX DUAL ACTING SAFETY GEARS - DIRECT CONNECTIONTD1.4.2
THIS ARRANGEMENT USES THE FOLLOWING
2 OFF SWITCH KITS - SK7
1 OFF DUPLEXING KITS - SK5
2 OFF AUXILIARY INERTIA KIT - SK3
2 OFF STANDARD OPERATING KITS - SK1
1 OFF WEDGE CLAMP KIT - SK9
2010 A
234 TO CLEAR LINKAGES
213 rod centres
"UPWARD" ACTING SAFETY GEAR
"DOWNWARD" ACTING SAFETY GEAR
M12 CLEVIS
DUPLEXING KIT - SK5
SPRING ADJUSTING NUTS
LINKAGE STOP NUTS
KIT SK3 USED AS LINKAGE BALANCING SPRING
FIT ONLY ONE TORSION
SPRING EACH END. FIT
TO LOWER SET.
2 TORSION SPRINGS REQUIRED
ON EACH END UNIT
PULL UP TO OPERATE
PULL DOWN TO OPERATE
ADDITIONAL BRACING IF REQUIRED.
SEE DATA SHEET TD 1.5
ACCESSORY KIT SK9
3000 NEWTONS
MAXIMUM FORCE
3000 NEWTONS
MAXIMUM FORCE
WEDGE CLAMPS TO DIN 15315
LINK PLATES - KIT SK6
CONNECTING ROD BETWEEN UPPER AND LOWER SAFETY GEARS
PROVIDED BY CAR MANUFACTURER
VG Range of Safety Gears Version 3.0 22
Figure TD1.4.2 Duplex dual acting safety gears - direct connection - Year 2011 - Issue A – sheet 2IS
SU
E N
O.
D
AT
E.
RE
VIS
ION
.
IN
ITIA
L.
BA
LL
MIL
L T
OP
BU
SIN
ES
S P
AR
K
AT
WE
LL I
NT
ER
NA
TIO
NA
L L
TD
DR
AW
ING
NO
.
IS
SU
E N
O.
DE
SC
RIP
TIO
N:
WO
RC
ES
TE
R
WR
2 6
PD
HA
LL
OW
DO
NO
T S
CA
LE
DR
AW
ING
.
FIN
ISH
:
SH
EE
T
O
F
MA
TE
RIA
L:
Te
l:
01
90
5 6
41
88
1
Fa
x:
01
90
5 6
41
29
8W
eb
: w
ww
.atw
ell
inte
rna
tio
na
l.c
om
Em
ail
: i
nfo
@a
twe
llin
tern
ati
on
al.
co
m
23 Atwell International Limited
Figure TD1.5 Duplex Operation - Kit SK5 - Year 2011 - Issue C
YEAR ISSUE
FIGURE NUMBER
TD1.5
C A M E R O N D E S I G N - NORTHAMPTON ENGLAND
NO
TE
PU
RC
HA
SE
R T
O E
NS
UR
E S
AF
ET
Y G
EA
RC
LE
AR
S G
UID
E C
LIP
S, J
OIN
T P
LA
TE
BO
LT
S A
ND
GU
IDE
FIX
ING
S
NO
TE
TH
IS A
PP
LIC
AT
ION
US
ES
TH
E F
OL
LO
WIN
G K
ITS
1 O
FF
ST
AN
DA
RD
OP
ER
AT
ING
KIT
- S
K1
1 O
FF
SA
FE
TY
SW
ITC
H K
IT -
SK
71
OF
F D
UP
LE
XIN
G K
IT -
SK
5
GENERAL ARRANGEMENT - DUPLEX MOUNTING
LIN
KA
GE
TO
CO
NN
EC
T U
PP
ER
AN
D
LO
WE
R S
AF
ET
Y G
EA
RS
AT
TH
IS E
ND
IS F
ITT
ED
ON
TH
E S
IDE
RE
MO
TE
FR
OM
T
HE
OP
ER
AT
ING
AR
M
2011 C
213
DU
PL
EX
ING
LIN
KA
GE
CO
NN
EC
TIN
G L
INK
AG
E
SW
ITC
H C
AN
BE
MO
UN
TE
D E
ITH
ER
EN
D
DU
PL
EX
ING
LIN
KA
GE
ST
AN
DA
RD
OP
ER
AT
ING
KIT
- S
K1
DU
PL
EX
ING
KIT
- S
K5
AC
TU
AT
ING
RO
D
Ad
diti
on
al b
raci
ng
if r
eq
uire
dto
en
sure
sa
fety
ge
ars
are
st
ab
le in
th
is p
lan
e.
(Su
pp
lied
by
lift
ma
nu
fact
ure
r)B
uff
er
cha
nn
els
FO
RC
E T
O A
CT
UA
TE
WIT
HO
UT
T
OR
SIO
N S
PR
ING
S O
RA
CT
UA
TIN
G R
OD
IS 6
0 N
EW
TO
NS
SA
FE
TY
GE
AR
S A
RE
LO
CA
TE
D A
ND
B
OL
TE
D T
OG
ET
HE
R A
S S
HO
WN
US
ING
8 D
IA L
OC
AT
ION
PIN
S A
ND
M1
6 B
OL
TS
PR
OV
IDE
D W
ITH
DU
PL
EX
ING
KIT
SK
5
VG Range of Safety Gears Version 3.0 24
Figure TD1.6 Dual acting safety gear - direct connection - Year 2011 - Issue FYEAR ISSUE
FIGURE NUMBER
DUAL ACTING SAFETY GEARS - DIRECT CONNECTION TD1.6
NOTETHIS APPLICATION USES THE FOLLOWING KITS
2 OFF STANDARD OPERATING KITS - SK1
1 OFF CONNECTION KIT - SK61 PAIR WEDGE CLAMPS - SK92 OFF SWITCH KITS - SK7
C A M E R O N D E S I G N NORTHAMPTON ENGLAND
2 OFF INERTIA SPRING KITS - SK3
ACCESSORY KIT SK9
3000 NEWTONSMAXIMUM FORCE
CROWN CHANNELS
PULL UP TO OPERATE"DOWNWARD" ACTING SAFETY GEAR
PULL DOWN TO OPERATE"UPWARD" ACTING SAFETY GEAR
3000 NEWTONSMAXIMUM FORCE
BY CAR MANUFACTURER
234
125
WEDGE CLAMPS TO DIN 15315
M12 CLEVIS ASSY
LINK PLATES - KIT SK6
CONNECTING ROD BETWEEN UPPER AND LOWER SAFETY GEARS
SAFETY SWITCH KIT - SK7
GUIDE SHOE ADAPTOR PLATE
Buffer channels
STANDARD OPERATING KIT - SK1
213
PROVIDED BY CAR MANUFACTURER
USE KIT - SK3 WITHOUT SPRINGADJUST STOP NUTS ONLY
SK3 KIT USED AS LINKAGEBALANCING SPRING
VG safety gears fitted with2 torsion springs per end unit
2011 F
VG safety gear fitted with 1 torsion spring per end unit
Stop nuts
25 Atwell International Limited
Figure TD1.7 VG-5 Bi-directional safety gear - Year 2002 - Issue E
4 clevises assemblies supplied
Switch kit SK7Torsion Springs - 2 off CDS05919
Front view of safety gear Rear view of safety gear
2 OFF SWITCH KIT - SK7
6 OFF TORSION SPRING
UPWARD ACTING
100 NewtonsDOWNWARD ACTING
1 OFF LINK PLATE - SK6B
NOTE!
100 Newtons
The VG-5 is fitted with integral inertia springs as illustrated. These have been designed to
system inertia. EN-81 requires the governor to generate a minimum force of 300 Newtons.
Switch can be mounted horizontally
provide a 100 Newtons force at the operating linkage. This force is used to overcome governor
1 off CDS05920
The integral inertia springs are suitable for lift travels up to 40 metres
2 OFF OPERATING KIT - SK1 (4 clevises)
SUPPLIED OPERATING KIT AK7 for VG-5
2 off CDS05919
1 off CDS05920
YEAR ISSUE
FIGURE NUMBER
TD1.7
C A M E R O N D E S I G N - NORTHAMPTON ENGLAND
VG-5 BI-DIRECTIONAL SAFETY GEAR
Front view of safety gear Rear view of safety gear
2 OFF SWITCH KIT - SK7
6 OFF TORSION SPRING
UPWARD ACTING
100 NewtonsDOWNWARD ACTING
1 OFF LINK PLATE - SK6B100 Newtons
Switch can be mounted horizontally 1 off CDS05920
2 OFF OPERATING KIT - SK1 (4 clevises)
OPERATING KIT AK7 for VG-5
2002 E
Switch kit SK7
4 clevises assemblies supplied
Torsion Springs - 2 off CDS05919
NOTE!
The VG-5 is fitted with integral inertia springs as illustrated. These have been designed to
system inertia. EN-81 requires the governor to generate a minimum force of 300 Newtons.provide a 100 Newtons force at the operating linkage. This force is used to overcome governor
The integral inertia springs are suitable for lift travels up to 50 metres when used with kit SK10
VG Range of Safety Gears Version 3.0 26
Figure TD1.7.1 VG5 with bi-directional Kit SK10 - Year 2004 - Issue D
C A M E R O N D E S I G N - NORTHAMPTON ENGLAND
YEAR ISSUE
FIGURE NUMBER
TD-1.7.1
MAXIMUM GOVERNOR FORCE
Refer to data sheet TD-SK10
Accessory kit SK9 (Other sizes available)
LENGTH OF CONNECTING LINK MUSTBE ADJUSTED SO THAT THE BRACKETHAS 44 mm OF TRAVEL IN BOTH DIRECTIONS
Wedge sockets not drawn
Supplied with kit SK10
ACCESSORY KITS REQUIRED
2 OFF SWITCH KITS SK72 OFF STANDARD OPERATING KITS SK11 0FF ROPE SOCKET KIT SK91 OFF BI-DIRECTIONAL KIT SK10
KIT SK10 WITH BI-DIRECTIONAL SAFETY GEAR VG-5
1 OFF LINK PLATE CDS10059
2 OFF M12 Nyloc nuts2 OFF M12 x 30 Hex Head Screws
2004 D
900 NEWTONS
305 R
ef
Connecting link by lift manufacture
Bracket can be rotated Wedge clamps to DIN 15315
To suit 6 - 8 mm diameter rope
Accessory kit SK-10
44
44
61
Adaptor plate (see TD1.7.2)
Switch kit SK7
150
67
49
370
280
Stabiliser bracket
2 m
etr
es
max
with
out st
abili
ser
bra
cket
Clevis with kit SK1
Studding and nuts with kit SK10
50
500 M
inim
um
219
2000 M
axi
mum
Link plate CDS10059
M12 screw and nyloc nut
Connecting rods by lift manufacturer
98
40
16
27 Atwell International Limited
Figure TD1.7.1 VG5 with bi-directional Kit SK10 - Year 2004 - Issue D – sheet 2
KIT
SK
-10
WIT
H B
I-D
IRE
CT
ION
AL
SA
FE
TY
GE
AR
VG
-5
SH
EE
T
O
F
ISS
UE
NO
.
DA
TE
.
R
EV
ISIO
N.
INIT
IAL
.
BA
LL
MIL
L T
OP
BU
SIN
ES
S P
AR
K
AT
WE
LL I
NT
ER
NA
TIO
NA
L L
TD
FIN
ISH
:
DO
NO
T S
CA
LE
DR
AW
ING
.
DE
SC
RIP
TIO
N:
DR
AW
ING
NO
.
IS
SU
E N
O.
MA
TE
RIA
L:
WO
RC
ES
TE
R
WR
2 6
PD
HA
LL
OW
Te
l:
01
90
5 6
41
88
1
Fa
x:
01
90
5 6
41
29
8W
eb
: w
ww
.atw
ell
inte
rna
tio
na
l.c
om
Em
ail
: i
nfo
@a
twe
llin
tern
ati
on
al.
co
m
VG Range of Safety Gears Version 3.0 28
Figure TD1.7.2 Combined safety gears - Year 2011 - Issue EYEAR ISSUE
FIGURE NUMBER
C A M E R O N D E S I G N - NORTHAMPTON ENGLAND
TD1.7.2
2 O
FF
ST
AN
DA
RD
OP
ER
AT
ING
KIT
- S
K1
CO
NN
EC
TIO
N K
IT A
K7 fo
r C
OM
BIN
ED
SA
FE
TY
GE
AR
S
2 O
FF
SW
ITC
H K
IT -
SK
71 O
FF
CO
MB
INE
D A
CT
UA
TIN
G K
IT -
SK
6C
ensu
re t
hat
an a
dapto
r pla
te 1
6 m
m t
hic
k is
fitt
ed
betw
een t
he b
uff
er
channels
and t
he s
afe
ty g
ear
When c
om
bin
ing s
afe
ty g
ears
beneath
the li
ft c
ar
SU
ITA
BLE
FO
R A
MA
XIM
UM
(P
+Q
) O
F 4
500 k
gP
LE
AS
E S
EE
K A
DV
ICE
AT
HIG
HE
R L
OA
DS
COMBINED SAFETY GEARS - BELOW LIFT CAR
RE
CO
MM
EN
DE
D D
ES
IGN
OF
AD
AP
TO
R P
LA
TE
A m
inim
um
of
4 f
ixin
gs
should
be p
rovi
ded t
o s
ecu
reth
e a
dapto
r pla
te t
o t
he b
uff
er
channels
usi
ng
M12 c
ounte
rsunk
scre
ws
as
illust
rate
d.
Additi
onal b
raci
ng
may
be r
equir
ed t
o s
tabili
se t
he e
nd u
nits
.
115
75
60
175
17 w
ide s
lots
for
safe
ty g
ear
To c
ove
r ch
annel f
langes
6 t
o 1
0 m
m c
leara
nce
Adapto
r pla
te
30
4 o
ff M
12 c
'sunk
sock
et
head s
crew
Additi
onal b
raci
ng if
required
SW
ITC
H K
IT -
SK
7
LIN
K P
LA
TE
TO
SU
IT
12.3
DIA
HO
LE
Note
s
to s
trength
en t
he c
hannel f
langes
as
per
data
sheet
TD
-2.1
2011 E
VG
-6
VG
-2a
It is
reco
mm
ended t
hat
the in
vert
ed V
G-2
a s
afe
ty g
ear
is s
trength
ened a
s per
data
sheet
TD
-2.1
29 Atwell International Limited
Figure TD1.8 Special Four guide rail lift - Year 2011 - Issue ESPECIAL DUPLEXED - FOUR GUIDE RAIL LIFT - GENERAL LAYOUT ISSUEDATE
FIGURE NUMBER
TD1.8
C A M E R O N D E S I G N - NORTHAMPTON ENGLAND
LIN
KA
GE
BA
LA
NC
ING
SP
RIN
G
TO
RS
ION
BA
R A
SS
EM
BLY
BY
LIF
T M
AN
UF
AC
TU
RE
RT
OR
SIO
NA
L S
TIF
FN
ES
S T
O E
NS
UR
E A
MA
XIM
UM
LA
GO
F 3
mm
A
T A
FO
RC
E O
F 1
50 N
EW
TO
NS
ON
T
HE
LIN
KA
GE
S R
EM
OT
E F
RO
M T
HE
GO
VE
RN
OR
CO
NN
EC
TIO
N
213 r
od c
entr
es
M12 C
LE
VIS
AS
SE
MB
LY
LIN
K P
LA
TE
S -
KIT
SK
6
LIN
KA
GE
BA
LA
NC
ING
SP
RIN
G
SEE NOTE BELOW
EN
D G
OV
ER
NO
R L
OC
AT
ION
TO
SU
IT
150 to 2
00
FIT
ON
E T
OR
SIO
N S
PR
ING
TO
EA
CH
UP
PE
R B
LO
CK
LIN
KA
GE
BA
LA
NC
ING
SP
RIN
GA
DJU
ST
TO
SU
IT T
HE
M
AS
S O
F T
HE
LIN
KA
GE
S
Piv
ot bra
cket to
suit
Tors
ion b
ar
arr
angem
ent by
car
manufa
cture
r
FO
R T
HE
"D
OW
NW
AR
D"
AC
TIN
G S
AF
ET
Y G
EA
RS
TO
RS
ION
BA
R L
EN
GT
H F
OR
EN
D G
OV
ER
NO
R L
OC
AT
ION
TO
RS
ION
BA
R L
EN
GT
H F
OR
CE
NT
RA
L G
OV
ER
NO
R
SE
E D
AT
A S
HE
ET
TD
1.8
.2 F
OR
SU
GG
ES
TE
D S
IZE
S A
ND
DE
SIG
NO
F T
OR
SIO
N B
AR
AR
RA
NG
EM
EN
Tpiv
ot bra
cket by
car
manufa
cture
r
M12 S
TU
DD
ING
BY
MA
NU
FA
CT
UR
ER
RE
MO
VE
OR
DIS
CO
NN
EC
T A
LL T
OR
SIO
N S
PR
ING
SF
ITT
ED
TO
TH
E "
DO
WN
" A
CT
ING
SA
FE
TY
GE
AR
S
Duple
xing k
its h
ere
Buffer
channels
Sto
p n
uts
US
E K
IT S
K3 W
ITH
OU
T A
UX
ILIA
RY
SP
RIN
GA
DJU
ST
LIN
KA
GE
ST
OP
NU
TS
ON
LY
8 O
FF
M12 C
LE
VIS
AS
SE
MB
LY
TH
IS A
RR
AN
GE
ME
NT
US
ES
TH
E F
OLLO
WIN
G
4 O
FF
ST
AN
DA
RD
OP
ER
AT
ING
KIT
S -
SK
14 O
FF
SW
ITC
H K
ITS
- S
K7
2 O
FF
DU
PLE
XIN
G K
ITS
- S
K5
4 O
FF
LIN
K P
LA
TE
S -
KIT
SK
6
45 m
m T
RA
VE
L U
P A
ND
DO
WN
FO
R "
UP
WA
RD
" A
CT
ING
SA
FE
TY
GE
AR
S
AD
JUS
T N
UT
S O
N S
K3 K
ITS
TO
SU
IT
PU
LL D
OW
N T
O O
PE
RA
TE
- 1
50 N
EW
TO
NS
CE
NT
RA
L G
OV
ER
NO
R
PR
EF
ER
RE
D L
OC
AT
ION
PU
LL U
P T
O O
PE
RA
TE
- 1
60 N
EW
TO
NS
See d
ata
sheet fo
r duple
xing T
D-1
.5F
it addtio
nal b
raci
ng a
s re
quired
4 O
FF
AU
XIL
IAR
Y S
PR
ING
KIT
S -
SK
3
MAY 2011 E
VG Range of Safety Gears Version 3.0 30
Figure TD1.8.1 Special Four guide rail lift - General layout - Year 2011 - Issue C
31 Atwell International Limited
Figure TD1.8.4 Special Four guide rail lift - General layout - Year 2010 - Issue A
ISSUEDATE
FIGURE NUMBER
C A M E R O N D E S I G N - NORTHAMPTON ENGLAND
TH
IS A
RR
AN
GE
ME
NT
US
ES
TH
E F
OLLO
WIN
G
Piv
ot bra
cket to
suit
Tors
ion b
ar
arr
angem
ent by
car
manufa
cture
rpiv
ot bra
cket by
car
manufa
cture
r
150 to 2
00
TO
RS
ION
BA
R L
EN
GT
H F
OR
EN
D G
OV
ER
NO
R L
OC
AT
ION
TO
RS
ION
BA
R L
EN
GT
H F
OR
CE
NT
RA
L G
OV
ER
NO
R
EN
D G
OV
ER
NO
R L
OC
AT
ION
SE
E D
AT
A S
HE
ET
TD
1.8
.2 F
OR
SU
GG
ES
TE
D S
IZE
S A
ND
DE
SIG
NO
F T
OR
SIO
N B
AR
AR
RA
NG
EM
EN
T
CE
NT
RA
L G
OV
ER
NO
R
PR
EF
ER
RE
D L
OC
AT
ION
214 r
od c
entr
es
TO
SU
IT
TO
RS
ION
BA
R A
SS
EM
BLY
BY
LIF
T M
AN
UF
AC
TU
RE
RT
OR
SIO
NA
L S
TIF
FN
ES
S T
O E
NS
UR
E A
MA
XIM
UM
LA
GO
F 3
mm
A
T A
FO
RC
E O
F 1
50 N
EW
TO
NS
ON
T
HE
LIN
KA
GE
S R
EM
OT
E F
RO
M T
HE
GO
VE
RN
OR
CO
NN
EC
TIO
N
M12 S
TU
DD
ING
BY
MA
NU
FA
CT
UR
ER
adjust to suit
2 O
FF
AU
XIL
IAR
Y K
ITS
- S
K3
2 O
FF
ST
AN
DA
RD
OP
ER
AT
Recommended