Handbook Conical Mountings

7/27/2019 Handbook Conical Mountings

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Version: 0.1 [1/20] Datum: 20-05-2011

List of contents1. Fundamental safety indications

1.1 Danger indications1.2 Failure modes1.3 Symbols

Installation and maintenance instructions

Conical mountings


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List of contents

2. Purpose of conical mountings2.1 Specification2.2 Shock2.3 Classification

3. Transport3.1 Unpacking the consignments3.2 Storage

4. Assembly4.1 Preparation4.2 Fitting4.3 Alignment of the engine4.4 Filler plates4.5 Pouring4.6 Vertical buffer adjustment4.7 Final assembly4.8 Additional instructions for fitting conical mountings with divided stud4.9 Table with physical dimensions / tolerances4.10 Key widths central buffers and nuts standard conical mountings4.11 Tightening torques bolts and nuts standard conical mountings4.12 Key widths central buffers and nuts special conical mountings (long spindles)4.13 Tightening torques bolts and nuts special conical mountings (long spindles)4.14 Key widths central buffers and nuts conical mountings with divided stud4.15 Tightening torques bolts and nuts conical mountings with divided stud

5. Maintenance5.1 Lifetime expectations5.2 Oil contamination5.3 Cleaning5.4 Replacement of rubber elements5.5 Paint5.6 Central buffer clearance5.7 Traceability by serial numbers

6. Influences on rubber element6.1 Creep6.2 Thermoshock6.3 Thermal expansions6.4 Typical example

7. Minimum dimensions to reject a flexible mounted system7.1 Conical mountings RD 1-serie7.2 Conical mountings RD 2-serie7.3 Conical mountings RD 3-serie

8. Data sheet for loaded height

9. Weight of the standard conical mountings

10. List of deviations

11. Remarks


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1. Fundamental safety indicationsIt is advisable to read the instructions completely, before starting to design and / or fit the resilientlymounted system. There are several possible ways to fit the conical mountings to the suspendedequipment and / or foundation, the final choice being with the end user.

1.1 Danger indicationsAlthough the components of the conical mountings should be free from burrs, we strongly advise towear gloves by handling the conical mountings. For reason of weight, we advise to apply dedicatedlifting material, taking into consideration the available safety rules and instructions for such tools.

1.2 Failure modesOil contamination can damage the rubber surface and may influence the static and dynamic propertiesof the conical mounting.

1.3 SymbolsImproper adjustment of the central buffer will influence the dynamic performance of the resilientmounted installation.

Marking of an endangerment with risk for injuries or damage to properties, ifadvice is not followed.

Marking of special measures to environmental protection.

Marking of special and other important or particularly useful information.


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2. Purpose of conical mountingsThe range of conical marine mountings were designed specially with medium speed engines in mind.The conical design provides high deflection and load capacity combined with long service life.

Although originally designed for main engine, auxiliary engine and generator installations, themountings are particularly versatile and can be equally used for exhaust gasboilers and silencers. Forapplications like the suspension of deckhouses, accommodation rooms and control cabins, thismounting is an excellent isolator against structure borne vibration and noise (passive isolation).The acoustic properties of this type of mounting are excellent. The result of the measured structure -borne vibration and noise transmission are available. In both vertical and horizontal directions thetransfer functions show in the low frequency range a decrease of 12 dB/octave, an ideal mass-lessspring characteristics.

2.1 SpecificationThe characteristics of the mounting are provided by a conical rubber element designed to carry thevertical load in a combination of compression and shear. The rubber elements for the mountings areproduced in several types. Type RD 113, 114, 214 and 314 are produced with extra interleaf rings andtype RD 115, 215 and 315 without extra interleaf ring. The types RD 244 and 344 are produced withextra interleaf ring and opposite recesses to enable different stiffnesses in three directions.

The rubber elements are manufactured in five standard NR rubber mixes: 45, 50, 55, 60 and 65Shore A and consequently cover a wide range of load / deflection requirements. Applicable up to 70Ccontinuous and 90C peak temperatures. Next to that, for the high temperatures applications, thereare special developed compounds for 90C continuous and 110C peak temperature and 110Ccontinuous and 130C peak temperature available in the above mentioned Shore A hardnesses.

All mounting inserts are both individual tested and selected on stiffness by Rubber Design BV. Themounting castings are manufactured in a seawater resisting aluminium-silicon alloy or nodular cast

iron. They are designed to protect the rubber element against oil and physical damage. An adjustablecentral buffer (spindle), manufactured in high tensile steel, controls the mounted equipmentdisplacements due to e.g. shipmovements, both vertically and horizontally within defined limits and soeliminates the need for separate stoppers. The groove in the basecasting allows the buffer adjustmentto be checked.

2.2 ShockThe configuration of the RD 113 mountings with nodular cast iron castings can withstand shock-loadsup to 360 kN in all directions. The standard execution of the RD 112 / RD 114 / RD 115 in nodular castiron can withstand shock loads up to 300 kN in all directions.The configuration of the RD 214 / RD 215 / RD 244 mountings with aluminium castings can withstandshock-loads up to 150 kN in all directions. The configuration of the RD 214 / RD 215 / RD 244

mountings with cast iron castings can withstand shock-loads up to 230 kN in all directions.The configuration of the RD 314 / RD 315 / RD 344 mountings with aluminium castings can withstandshock-loads upto 70 kN in all directions. The configuration of the RD 314 / RD 315 / RD 344mountings with cast iron castings can withstand shock-loads up to 160 kN in all directions.

For the shock-loads of the height re-adjustable configurations, please contact Rubber Design BV.


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2.3 ClassificationThe mountings and our calculation method have been approved on many applications by the followingclassification societies:

American Bureau of Shipping

Bureau Veritas

China Classification Society

China Corporation Register Of Shipping

Det Norske Veritas

Germanischer Lloyd

Korean Register of Shipping

Lloyds Register of Shipping

Russian Maritime Register of Shipping

3. Transport

The delivery has to be examined upon receipt for any possible shipping damage. If there is anyshipping damage, this must be reported immediately to the carrier. If any shipping damage may leadto dysfunction of the regular operation limits, parts have to be rejected

Lifting and transporting the product may only be performed by persons who: Have the permission to operate cranes. Have the permission to drive motorized lifting machines. Know the validated transportation and instructions manual of the composition drawing.

Risk of accidents due to falling over-order loads During transport of the conical mountings, due to its size and weight, accidents can occur. Be careful when lifting not to damage the conical mountings. Otherwise it has to be reported. Use only appropriate means of transport and lifting equipment with sufficient capacity.

Dont stand or work underneath suspended loads. Wear appropriate protective clothing.

3.1 Unpacking the consignmentsObserve the guidelines for environmental protection. As well as environmental friendly disposal of thepackaging.

3.2 Storage

Storage, cleaning and maintenance of the rubber elements should be done in accordance withISO2230. The cleaning of the conical mountings should be done with a normal (household) cleansingagent. It is also advisable to use a glycerine-alcohol mixture (1:10). Do not use a solvent cleansing

agent.


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4. AssemblyIt is advisable to read the instructions completely, before starting to design and / or fit the resilientlymounted system. There are several possible ways to fit the conical mountings to the suspendedequipment and / or foundation, the final choice being with the end user.

4.1 PreparationIt is critical that the correct conical mounting is installed at the proper location. Clean the bracket andthe conical mounting, especially on the contact surfaces. Clean the upper surface of the shipsfoundation from dust, rust, oil, dirt and particles at the intended positions of the conical mountings. Anticorrosion oil should be applied on the steel parts. Attach each mounting to the engine / installationbrackets handtight. Lower the installation load onto the conical mountings.

4.2 FittingCheck that all central buffers can be turned easily by applying a spanner to the top hexagon. If this is notpossible it will be necessary to partly remove the installation load, until the buffers can be turned freely.The central buffer should now be turned anti-clockwise (upwards) and the installation re-lowered ontothe conical mountings. Check that all central buffers can be turned freely with full installation load on theconical mountings. If this is not the case then the above mentioned procedure should be repeated.

Where practical, the conical mountings should be allowed to settle for a minimum of 48 hours before anyattempt is made to line-up drives, pipe-work, etc. The suspended installation may now be levelled ifnecessary by means of jacking screws which can be placed into the tapped holes of the base casting ofeach conical mounting.

Care must be taken, during levelling of the installation, to ensure that individual mountings are notoverloaded. The variation in laden height should not exceed 2 mm and should ideally be less. The ladenheight can be measured between top- and basecasting at H3 / H4 on two sides. The difference between

the two sides of a conical mounting should not be more than the value mentioned in the table.

4.3 Alignment of the engineAlign the engine by means of hydraulic jacks. The four jacking bolts are only intended to maintain theinitial alignment. Please be aware that, when using the jacking bolts for final alignment, only 0,5 turnseach time per bolt is allowed.

Axially : According to the axial alignment reference dimension of the flexible couplingRadially : Engine crankshaft presetted with respect to the gearbox, alternator or other input shaft

according to the calculations.Angularly : Measured on the outside diameter of the coupling.

4.4 Filler platesIndividual filler plate thickness can now be measured. Notice that the filling plate must at least have thedimensions of the mounting foot.


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4.5 PouringChocking of the foundation plate by means of synthetic cast resin is to be done by the manufacturer orits authorised agency. The type of the cast resin has to be approved by the responsible classificationsociety. The supplier of the cast resin or its authorised personnel has to confirm the mechanicalstrength of the cast resin considering the tightening torque of the foundation bolts, engine weight andengine torque.

In order to avoid an additional thermal shock of the rubber elements of the conical mountings, anadditional heat treatment for speeding up the curing process of the cast resin is not permissible!

After curing (curing time is stated by the manufacturer of the synthetic casting resin), the jacking boltsare to be removed. The foundation bolts have to be tightened in accordance with the requiredtightening torque.

4.6 Vertical buffer adjustmentWe advise that the buffer clearance should be set by means of the number of turns of the centralbuffer. This should be done in cold condition (20C). The pitch of the thread is precisely machined at2 mm, therefore the working clearance must be correct if the buffer clearance is set as describedbelow.

The central buffer working clearance for each conical mounting can be set as follows:Turn the central buffer clockwise (downwards) to the maximum lower position until it contacts the fillerplate or foundation. Turn the central buffer anti-clockwise (upwards) into its operating position and toset the working clearance (see table).

The groove in the basecasting is not meant as a guide for setting the buffer clearance, which has to bedone by using the pitch of the thread, but only meant as a tool to check whether the central buffer is

not in contact with the foundation.To check, a feeler gauge can be used through the groove in thebasecasting of the mountings. A feeler gauge has to pass easily under the internal buffer.

4.7 Final assemblyThe buffer can be fixed by means of nut or lock ring (*), while simultaneously blocking the buffer byapplying a spanner to the top hexagon. The nut should be tightened with the maximum recommendedtorque. Further locking is not necessary. We recommend, as prevention against corrosion, to apply anamount of water-resistant grease in the supplied (nut) cap.

4.8 Additional instructions for fitting conical mountings with divided studTurn the central buffer clockwise (downwards) to the maximum lower position until it contacts the fillerplate or foundation. The stud can be tightened onto the buffer (recommended torque : see table). Turn

the central buffer anti-clockwise (upwards) into its operating position and to set the working clearance. Ifthe stud loosens from the buffer while turning it anti-clockwise, the stud should be tightened again ontothe buffer. The base casting of the conical mounting can be lifted by using four hexagon bolts to get thebuffer clear off the foundation and the stud and buffer can move freely.

When it is not possible to lift the base casting of the conical mounting by using four hexagon bolts, dueto the limited space to apply a spanner, you will need an external hydraulic jack to lift the engineslightly and remove some of the installation load before turning the central buffer anti-clockwise(upwards) into its operating position and to set the working clearance.

By turning the stud anti-clockwise it is possible to loosen the stud and remove it easily from the centralbuffer. After removing the stud it is easy to remove the conical mounting sideways after slightly lifting theinstallation.

For specific instructions for fitting of conical mountings with divided stud, please contact Rubber Design.A copy of the instructions including a drawing will be send on request.


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4.9 Table with physical dimensions/tolerances (in cold condition (20C))

Mounting type Allowabledifferenceper mounting

No. of turns to setworking clearance**

Workingclearance***

Torquedivided stud

Torquefixingbolt *

RD 113 0,9 mm 1,5 (anti-clockwise) 6,0 mm -RD 114 / RD 115 0,9 mm 2,0 (anti-clockwise) 6,0 mm 120 Nm -RD 214 / RD 215 / RD 244 0,6 mm 2,0 (anti-clockwise) 4,0 mm 80 Nm 2 Nm / 5NmRD 214X 0,6 mm 2,0 (anti-clockwise) 4,0 mm -RD 314 / RD 315 / RD 344 0,5 mm 2,0 (anti-clockwise) 4,0 mm 40 Nm -

* Lock ring is valid for the TR214DK1000A. Tightening torque of fixing bolt is 5 NmLock ring is valid for the TR214DK5030A. Tightening torque of fixing bolt is 2 Nm

** Seen from filler plate or foundation - environmental temperature 20C*** Given values are ideal values, tolerances of +/- 10% are allowed.


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4.10 Key widths central buffers and nuts standard conical mountings

Mounting type Execution Material Thread Key widthsCentral buffer Nut Adjusting nut

RD 113 Non height adjustable Cast iron M 56 x 4 36 85 -


RD 114 Height adjustable Cast iron M 48 x 3 30 75 100



RD 214 Non height adjustable Aluminium M 42 x 2 22 - -

RD 214 Height adjustable Aluminium M 27 x 2M 42 x 2

1930

4165

9090



1930

4165

9090



1930

4165

9090

RD 314 Non height adjustable Aluminium M 27 x 2 19 41 -

RD 314 Height adjustable Aluminium M 27 x 2 19 41 65






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4.11 Tightening torques bolts and nuts standard conical mountings

Mountingtype

Execution Material Nut Tighteningtorque

Bolts(4x)

Tighteningtorque

Thread depth*

RD 113 Non heightadjustable

Cast iron M 56 x 4 7600 Nm M 308.8 (base) 1425 Nm



RD 114 Height adjustable Cast iron M 48 x 3 4900 Nm M 278.8 (base) 1030 Nm





Aluminium M 42 x 2 - M 208.8 (base)M 208.8 (top)

400 Nm250 Nm 27 mm


1000 Nm1650 Nm

M 208.8 (base)M 208.8 (base)

400 Nm400 Nm


Aluminium M 42 x 2 - M 208.8 (base)M 208.8 (top)

400 Nm250 Nm 25 mm


1000 Nm1650 Nm

M 208.8 (base)M 208.8 (base)

400 Nm400 Nm

RD 244 Non height

adjustable

Aluminium M 42 x 2 - M 208.8 (base)

M 208.8 (top)

400 Nm

250 Nm 27 mm


1000 Nm1650 Nm

M 208.8 (base)M 208.8 (base)

400 Nm400 Nm


Aluminium M 27 x 2 300 Nm M 168.8 (base) 205 Nm

RD 314 Height adjustable Aluminium M 27 x 2 1000 Nm M 168.8 (base) 205 Nm


Aluminium M 27 x 2 300 Nm M 168.8 (base) 205 Nm


RD 344 Non heightadjustable Aluminium M 27 x 2 300 Nm M 168.8 (base) 205 Nm


* minimum required boltlength in topcasting : 25 mm


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4.12 Key widths central buffers and nuts special conical mountings (long spindles)

Mounting type Execution Material Thread Key widthsCentral buffer Nut Adjusting nut


RD 214 Non height adjustable AluminiumAluminiumAluminiumCast ironCast iron

M 24 x 2M 27 x 2M 42 x 2M 42 x 21 1/2-12UNF

191930301 1/8 (28,6)

364165652 1/4 (57,2)

-----

RD 214 Height adjustable Aluminium

Cast ironCast iron

M 24 x 2

M 27 x 2M 42 x 2

19

1930

36

4165

90

9090

RD 215 Non height adjustable AluminiumAluminium

M 24 x 2M 42 x 2

1930

3665

--

RD 215 Height adjustable Cast ironCast iron

M 27 x 2M 42 x 2

1930

4165

9090


M 27 x 2M 42 x 2

1930

4165

9090

RD 314 Non height adjustable Aluminium

AluminiumCast ironCast iron

M 20 x 1,5

M 24 x 2M 27 x 21- 12 UNF

13

19193/4 (19,05)

30

36411 1/2 (38,1)

-

---

RD 314 Height adjustable AluminiumCast ironAluminiumCast ironCast iron

M 20 x 1,5M 20 x 1,5M 24 x 2M 24 x 2M 27 x 2

1313191919

3030363641

6565656565

RD 315 Non height adjustable AluminiumAluminiumCast iron

M 16 x 1,5M 24 x 2M 27 x 2

101719

243641

---


Cast ironAluminiumCast ironCast iron

M 20 x 1,5

M 20 x 1,5M 24 x 2M 24 x 2M 27 x 2

13

13191919

30

30363641

65

65656565



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4.13 Tightening torques bolts and nuts special conical mountings (long spindles)

Mounting type Execution Material Nut Tighteningtorque

Bolts(4x)

Tighteningtorque

RD 113 Non height adjustable Cast iron M 48 x 3 4900 Nm M 278.8 (base) 1030 Nm

RD 214 Non height adjustable AluminiumAluminiumAluminiumCast ironCast iron

M 24 x 2M 27 x 2M 42 x 2M 42 x 21 1/2-12UNF

250 Nm300 Nm800 Nm1400 Nm1400 Nm

M 208.8 (base)M 208.8 (base)M 208.8 (base)M 208.8 (base)7/8 UNC (base)

400 Nm400 Nm400 Nm400 Nm400 Nm


Cast ironCast iron

M 24 x 2

M 27 x 2M 42 x 2

400 Nm

600 Nm1400 Nm

M 208.8 (base)

M 208.8 (base)M 208.8 (base)

400 Nm

400 Nm400 Nm

RD 215 Non height adjustable AluminiumAluminium

M 24 x 2M 42 x 2

250 Nm800 Nm

M 208.8 (base)M 208.8 (base)

400 Nm400 Nm


M 27 x 2M 42 x 2

600 Nm1400 Nm

M 208.8 (base)M 208.8 (base)

400 Nm400 Nm


M 27 x 2M 42 x 2

600 Nm1400 Nm

M 208.8 (base)M 208.8 (base)

400 Nm400 Nm

RD 314 Non height adjustable Aluminium

AluminiumCast ironCast iron

M 20 x 1,5

M 24 x 2M 27 x 21- 12 UNF

200 Nm

400 Nm600 Nm600 Nm

M 168.8 (base)

M 168.8 (base)M 168.8 (base)5/8 UNC (base)

205 Nm

205 Nm205 Nm205 Nm


M 20 x 1,5M 20 x 1,5M 24 x 2M 24 x 2M 27 x 2

200 Nm280 Nm400 Nm500 Nm600 Nm

M 168.8 (base)M 168.8 (base)M 168.8 (base)M 168.8 (base)M 168.8 (base)

205 Nm205 Nm205 Nm205 Nm205 Nm


M 16 x 1,5M 24 x 2M 27 x 2

150 Nm400 Nm600 Nm

M 168.8 (base)M 168.8 (base)M 168.8 (base)

205 Nm205 Nm205 Nm


M 20 x 1,5M 20 x 1,5M 24 x 2M 24 x 2M 27 x 2

200 Nm280 Nm400 Nm500 Nm600 Nm

M 168.8 (base)M 168.8 (base)M 168.8 (base)M 168.8 (base)M 168.8 (base)

205 Nm205 Nm205 Nm205 Nm205 Nm



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4.14 Key widths central buffers and nuts conical mountings with divided stud

Mounting type Execution Material Thread Connectionthread

Key widthsCentral buffer Nut Adjusting nut

RD 114 Non height adjustable Cast iron M 48 x 3 M 36 x 2 30 75 -

RD 114 Height adjustable Cast iron M 48 x 3 M 36 x 2 30 75 100


RD 214 Non height adjustable AluminiumCast iron

M 27 x 2M 42 x 2

M 24 x 2M 27 x 2

1930

4165

--

RD 214 Height adjustable AluminiumCast iron

M 27 x 2M 27 x 2

M 24 x 2M 24 x 2

1919

4141

9090


RD 215 Height adjustable Aluminium M 27 x 2 M 24 x 2 19 41 90

RD 244 Height adjustable Cast iron M 27 x 2 M 24 x 2 19 41 90


M 20 x 1,5M 27 x 2M 27 x 2

M 18 x 1,5M 18 x 1,5M 18 x 1,5

131919

304141

---

RD 314 Height adjustable AluminiumCast iron M 27 x 2M 27 x 2 M 18 x 1,5M 18 x 1,5 1919 4141 6565

RD 315 Non height adjustable Aluminium M 27 x 2 M 18 x 1,5 19 41 -

RD 315 Height adjustable AluminiumAluminium

M 24 x 2M 27 x 2

M 18 x 1,5M 18 x 1,5

1919

3641

6565

RD 344 Non height adjustable Cast iron M 27 x 2 M 18 x 1,5 19 41 -


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4.15 Tightening torques bolts and nuts conical mountings with divided stud

Mounting type Execution Material Nut Tighteningtorque

Bolts(4x)

Tighteningtorque




RD 214 Non height adjustable AluminiumCast iron

M 27 x 2M 42 x 2

700 Nm700 Nm

M 208.8 (base)M 208.8 (base)

400 Nm400 Nm

RD 214 Height adjustable AluminiumCast iron

M 27 x 2M 27 x 2

700 Nm700 Nm

M 208.8 (base)M 208.8 (base)

400 Nm400 Nm





M 20 x 1,5M 27 x 2M 27 x 2

200 Nm300 Nm300 Nm

M 168.8 (base)M 168.8 (base)M 168.8 (base)

205 Nm205 Nm205 Nm

RD 314 Height adjustable AluminiumCast iron M 27 x 2M 27 x 2 300 Nm300 Nm M 168.8 (base)M 168.8 (base) 205 Nm205 Nm

RD 315 Non height adjustable Aluminium M 27 x 2 300 Nm M 168.8 (base) 205 Nm

RD 315 Height adjustable AluminiumAluminium

M 24 x 2M 27 x 2

250 Nm300 Nm

M 168.8 (base)M 168.8 (base)

205 Nm205 Nm



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5. MaintenanceThe central buffer clearance should be examined and reset if necessary after the first week, after threemonths and thereafter to fit in with normal maintenance programmes. To check the central buffer isnot in contact with the foundation, a feeler gauge can be used through the groove in the basecastingof the mountings.

The central buffer clearance can be checked by using a feeler gauge though the groove in thebasecasting of the mountings. A feeler gauge has to pass easily under the internal buffer.

5.1 Lifetime expectationsThe life expectancy of the rubber elements will be approx. 20 years in ideal circumstances.Unfortunately ideal circumstances are not feasible, therefore the (working) life expectancy will beapprox. 10 years. The life expectancy of the rubber elements is dependent on the environmentalcircumstances (weather influences, contaminants, etc).

A visual inspection of the conical mountings should be carried out six months after installation andshould be repeated every year. For better recognition of damages one can use a blunt pin. The use ofa screwdriver is not advisable, because of the damage it can cause to the conical mountings.

5.2 Oil contaminationThe use of a natural rubber (NR) compound for the rubber elements means that they are not oilresistant. The occasional occurrence of oil-leaks does not effect the working of the conical mountings,because the oil will only damage the surface of the rubber elements. In case of oil contamination therubber elements will show some signs of swelling.

To prevent damage caused by oil contamination, the rubber elements can be treated with an oil

resistant coating.

5.3 CleaningWhen cleaning the engine or the engine room with a solvent cleansing agent, it is advisable to coverup the conical mountings. If the cleansing agent still contaminates the rubber elements, they should becleaned as follows.

Storage, cleaning and maintenance of the rubber elements should be done in accordance withISO2230. The cleaning of the conical mountings should be done with a normal (household) cleansingagent. It is also advisable to use a glycerine-alcohol mixture (1:10). Do not use a solvent cleansingagent.

5.4 Replacement of rubber elementsIn cases where it is necessary to replace the rubber insert, we advise to return the complete conicalmounting to Rubber Design BV.

5.5 PaintIf required, the conical mountings can be painted by the customer. Be aware that only the top- andbasecasting of the conical mounting can be painted. Do not use paint on the rubber element as therubber element might be contaminated and therefore be damaged.

5.6 Central buffer clearance

The central buffer clearance should be examined and reset if necessary after the first week, after threemonths, and thereafter to fit in with normal maintenance programmes.


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5.7 Traceability by serial numbersEach conical mounting has a serial number for identification which will be used for replacement todeliver a complete new identical product or to replace the insert of the mountings in question withgenuine inserts and / or parts.

All deliveries are stored in a database including all relevant data and characteristics.

SerialnumberRubberhardness

Type of mounting


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6. Influences on rubber element

6.1 CreepThe typical creep rate of the conical mountings will vary with compound, rubber hardness, dynamicloads and strain. A typical figure for a natural rubber compound in Shore A for loads in between themaximum static load marine application and half that load will be 2% of the static deflection increaseper decade. 48 hours after loading, more than half of the total creep figure over 20 years will beachieved.

6.2 ThermoshockEvery temperature exceeding the latest achieved peak temperature will cause a permanent set of theconical mounting of approximately 0,01 mm /C in the range from 20 to 70 C. For instance the firstthermal load from surrounding temperature to normal working temperature will cause an extra set ofthe deflected height next to the normal creep. Every time the mounting temperature is raised to thenormal working temperature, no extra set will occur. Once the normal working temperature isexceeded, an extra set will occur again. The permanent set is directly related to the temperature of therubber element.

6.3 Thermal expansionsThe typical thermal expansion rate of the conical mounting will be approx. 0,03 mm / C increase inheight depending on compound, rubber hardness and strain. The expansion rate is directly related tothe temperature of the rubber element.

6.4 Typical exampleOn the next page you will find a sketch with the explanation of the deflections, thermoshock, thermal

expansion and extra deflections caused by creep. The numbers correspond with the numbers in thesketch. The values as mentioned are all assumptions.1) After assembly of the mountings, we will preset the mountings for 4 mm to simplify the installation

of the mountings underneath the diesel engine.2) After the engine is installed on the mountings, the weight of the diesel engine will be distributed

over the mountings and a deflection of 10 mm is reached.3) Due to the pre-heating of the diesel engine form 15 C to 35 C and supposed that the mountings

will follow after a period of time to the same level of temperature, the mountings will have athermoshock over the difference of 20 C. Based on our experience this will be 20 x 0,01 mm =0,2 mm. This will result in a permanent extra deflection.

4) In the meantime the conical mounting will grow due to the thermal expansion over the same rangeof 20 C. Based on our experience this will be 20 x 0,03 mm = 0,6 mm.

5) After cool down of the installation, the mountings will follow and the conical mountings become the

same height before the pre-heating of the diesel engine. Only the 0,2 mm of the thermoshockremains.6) Due to the full operation of the engine, the mountings will reach a temperature of lets say 55 C.

The thermoshock effect will cause an extra deflection; however, only from 35 C to 55 C !! Basedon our experience this will be 20 x 0,01 mm = 0,2 mm. This will again result in a permanent extradeflection.

7) In the meantime the conical mounting will grow due to the thermal expansion over the same rangeof 40 C. Based on our experience this will be 40 x 0,03 mm = 1,2 mm.

8) After cool down of the installation, the mountings will follow and the conical mountings become thesame height before the pre-heating of the diesel engine. Only the 0,2 mm of the thermoshockremains.


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9) In the meantime we have an extra deflection caused by creep; this starts already at point 1 andwill be after a period of approx. 2 years 1,49 mm. The extra deflection per decade will be 2 % andcan be calculated as follows.6 sec 10,00 mm deflection60 sec 10,00 x 1,02 10,20 mm deflection600 sec 10,25 x 1,02 10,40 mm deflection

1,9 year 10,00 x 1,027 11,49 mm deflection

10) So, when the engine is not running and supposed that the environment temperature is 15 C, thedeflection will be 11,90 mm. During running the conical mountings can reach a temperature of 55C and the deflection will be 10,70 mm due to thermal expansion.


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7. Minimum dimensions to reject a flexible mounted system

7.1 Conical mountings RD 1-serie

Marineapplication

Mountingtype

Shore A. MountingHeight H1(Unloaded)

Tolerance X-dimensionH3 (Unloaded)GGG Alu

Max.Deflection

X-dimensionH4 (Loaded)

Mountingheight H2(Loaded)

RD 114RD 114RD 114RD 114RD 114

4550556065

181,0181,0181,0181,0181,0

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

44,044,044,044,044,0

16,015,015,014,013,0

28,029,029,030,031,0

165,0 *166,0 *166,0 *167,0 *168,0 *

RD 115RD 115RD 115RD 115RD 115

4550556065

181,0181,0181,0181,0181,0

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

44,044,044,044,044,0

18,018,018,018,017,0

26,026,026,026,027,0

163,0 *163,0 *163,0 *163,0 *164,0 *

Stationaryapplication

Mountingtype



Max.Deflection



RD 114

RD 114RD 114RD 114RD 114

45

50556065

181,0

181,0181,0181,0181,0

+1,0 / -1,5

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

44,0

44,044,044,044,0

18,0

17,016,016,014,0

26,0

27,028,028,030,0

163,0 *

164,0 *165,0 *165,0 *167,0 *

RD 115RD 115RD 115RD 115RD 115

4550556065

181,0181,0181,0181,0181,0

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

44,044,044,044,044,0

20,020,020,019,018,0

24,024,024,025,026,0

161,0 *161,0 *161,0 *162,0 *163,0 *

*: The mounting height H2 (Loaded) is related to the mounting height H1 (Unloaded) without observingthe tolerance.


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Marineapplication

Mountingtype



Max.Deflection



RD 214RD 214RD 214RD 214RD 214RD 214RD 214

455055606570MDX

175,0175,0175,0175,0175,0175,0175,0

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

44,5 43,544,5 43,544,5 43,544,5 43,544,5 43,544,5 43,544,5 43,5

16,016,015,015,014,013,015,0

28,528,529,529,530,531,529,5

159,0 *159,0 *160,0 *160,0 *161,0 *162,0 *160,0 *

RD 215

RD 215RD 215RD 215RD 215

45

50556065

175,0

175,0175,0175,0175,0

+1,0 / -1,5

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

44,5 43,5

44,5 43,544,5 43,544,5 43,544,5 43,5

18,0

18,018,018,017,0

26,5

26,526,526,527,

157,0 *

157,0 *157,0 *157,0 *158,0 *

RD 244RD 244RD 244RD 244RD 244

4550556065

175,0175,0175,0175,0175,0

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

44,5 43,544,5 43,544,5 43,544,5 43,544,5 43,5

16,016,015,015,014,0

28,528,529,529,530,5

159,0 *159,0 *160,0 *160,0 *161,0 *


Mountingtype



Max.Deflection



RD 214RD 214RD 214RD 214RD 214RD 214RD 214

455055606570MDX

175,0175,0175,0175,0175,0175,0175,0

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

44,5 43,544,5 43,544,5 43,544,5 43,544,5 43,544,5 43,544,5 43,5

18,017,017,016,015,014,016,0

26,527,527,528,529,530,528,5

157,0 *158,0 *158,0 *159,0 *160,0 *161,0 *159,0 *

RD 215RD 215

RD 215RD 215RD 215

4550

556065

175,0175,0

175,0175,0175,0

+1,0 / -1,5+1,0 / -1,5

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

44,5 43,544,5 43,5

44,5 43,544,5 43,544,5 43,5

20,020,0

19,019,018,0

24,524,5

25,525,526,5

155,0 *155,0 *

156,0 *156,0 *157,0 *

RD 244RD 244RD 244RD 244RD 244

4550556065

175,0175,0175,0175,0175,0

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

44,5 43,544,5 43,544,5 43,544,5 43,544,5 43,5

17,017,017,016,015,0

27,527,527,528,529,5

158,0 *158,0 *158,0 *159,0 *160,0 *

*: The mounting height H2 (Loaded) is related to the mounting height H1 (Unloaded) withoutobserving the tolerance.


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Marineapplication

Mountingtype



Max.Deflection



RD 314RD 314RD 314RD 314RD 314RD 314

4550556065MDX

132,5132,5132,5132,5132,5132,5

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

32,5 31,532,5 31,532,5 31,532,5 31,532,5 31,532,5 31,5

15,014,014,013,013,014,0

17,518,518,519,519,518,5

117,5 *118,5 *118,5 *119,5 *119,5 *118,5 *

RD 315RD 315

RD 315RD 315RD 315

4550

556065

132,5132,5

132,5132,5132,5

+1,0 / -1,5+1,0 / -1,5

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

32,5 31,532,5 31,5

32,5 31,532,5 31,532,5 31,5

17,017,0

16,016,016,0

15,515,5

16,516,516,5

115,5 *115,5 *

116,5 *116,5 *116,5 *

RD 344RD 344RD 344RD 344RD 344

4550556065

132,5132,5132,5132,5132,5

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

32,5 31,532,5 31,532,5 31,532,5 31,532,5 31,5

15,014,014,014,013,0

17,518,518,518,519,5

117,5 *118,5 *118,5 *118,5 *119,5 *

RD 735RD 735

6065

132,5132,5

+1,0 / -1,5+1,0 / -1,5

32,532,5

16,016,0

16,516,5

116,5 *116,5 *


Mountingtype



Max.Deflection



RD 314RD 314RD 314RD 314RD 314RD 314

4550556065MDX

132,5132,5132,5132,5132,5132,5

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

32,5 31,532,5 31,532,5 31,532,5 31,532,5 31,532,5 31,5

16,016,015,015,014,015,0

16,516,517,517,518,517,5

116,5 *116,5 *117,5 *117,5 *118,5 *117,5 *

RD 315

RD 315RD 315RD 315RD 315

45

50556065

132,5

132,5132,5132,5132,5

+1,0 / -1,5

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

32,5 31,5

32,5 31,532,5 31,532,5 31,532,5 31,5

19,0

18,018,018,017,0

13,5

14,514,514,515,5

113,5 *

114,5 *114,5 *114,5 *115,5 *

RD 344RD 344RD 344RD 344RD 344

4550556065

132,5132,5132,5132,5132,5

+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5+1,0 / -1,5

32,5 31,532,5 31,532,5 31,532,5 31,532,5 31,5

16,016,015,015,014,0

16,516,517,517,518,5

116,5 *116,5 *117,5 *117,5 *118,5 *

RD 735RD 735

6065

132,5132,5

+1,0 / -1,5+1,0 / -1,5

32,532,5

18,017,0

14,515,5

114,5 *115,5 *

* : The mounting height H2 (Loaded) is related to the mounting height H1 (Unloaded) without observingthe tolerance


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[22/28]

8. Data sheet for loaded height

Unloaded condition Loaded condition

Before measuring the loaded height;please make sure that the internal buffer (spindle) can be turned freely.

As a minimum; please measure or H1 + H2 or H3 + H4

Pos Serialnumber H1 H2 H3 H4

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18


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[23/28]

9. Weight of the standard conical mountings

Mounting type Execution Material Approximate weight

RD 113 Non height adjustable Cast iron 64,5 kg


RD 114 Height adjustable Cast iron 62,0 kg


RD 115 Height adjustable Cast iron 60,5 kg

RD 214 Non height adjustable Cast ironAluminium

25,5 kg13,5 kg

RD 214 Height adjustable Cast ironAluminium

27,0 kg14,0 kg


25,0 kg13,0 kg


26,5 kg13,5 kg


25,5 kg13,5 kg


27,0 kg14,0 kg


16,0 kg8,0 kg


16,3 kg8,3 kg


15,2 kg7,2 kg

RD 315 Height adjustable Cast ironAluminium 15,5 kg7,5 kg


15,6 kg7,6 kg


15,9 kg7,9 kg


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10. List of deviations

Revision A 10-03-2009 Original issueRevision B 23-06-2004 List of deviations / Remarks added

Additional instructions divided stud changedRevision C 30-08-2007 Lay-outRevision D 10-03-2009 X-dimensions addedRevision E 23-01-2014 Lay-out updated

Torque and boltlength added


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11. Remarks


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Industrieweg 21 - P.O. Box 15 - 2995 ZG Heerjansdam - The Netherlands

Documents

Handbook Conical Mountings