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Internal use only 1
Technical Sales Guide
MQL Shrinkfit
holders
Release for sales: 04-2017
Publication: SN2017-2
Internal use only 3
1 Contents
2 Executive summary / Introduction .................................................................................................. 4
2.1 What is MQL? ......................................................................................................................... 4
2.2 Advantages of MQL ................................................................................................................ 4
2.3 Requirements to implement MQL ........................................................................................... 4
2.4 MQL1 and MQL2 ................................................................................................................... 5
3 Background ..................................................................................................................................... 6
3.1 History ..................................................................................................................................... 6
3.2 Market trends ........................................................................................................................... 6
3.3 Potential ................................................................................................................................... 6
4 EPB 5403/EPB 5403M/EPB 5403M1/EPB 5403M2 ...................................................................... 7
4.1 Tool holders: range summary and delivery content ................................................................ 7
4.2 EPB 5403 DIN type Shrinkfit holders ..................................................................................... 8
4.3 EPB 5403M: DIN type Shrinkfit holders, designed for MQL ................................................ 9
4.4 EPB 5403M1: DIN type Shrinkfit holders, equipped for MQL1 ............................................ 9
4.5 EPB 5403M2: DIN type Shrinkfit holders, equipped for MQL2 ............................................ 9
5 Key codes ...................................................................................................................................... 10
6 Tool holders and accessories for MQL1 ....................................................................................... 11
6.1 Selection of accessories for MQL1 ....................................................................................... 11
6.1.1 Coolant tube E930x… ................................................................................................... 11
6.1.2 Stop screw 19MQL1xxx ................................................................................................ 11
6.2 Tool holders: EPB 5403M or EPB 5403M1 .......................................................................... 11
7 Tool holders and accessories for MQL2 ....................................................................................... 12
7.1 Selection of accessories for MQL2 ....................................................................................... 12
7.1.1 Advice: refer to the Machining Navigator ..................................................................... 12
7.1.2 Coolant tube 20E930xM2xxx ........................................................................................ 13
7.1.3 Stop screw 19MQL2xxx ................................................................................................ 13
7.1.4 Selection of MQL2 accessories: principle ..................................................................... 14
7.2 Tool holders: EPB 5403M or EPB 5403M2 .......................................................................... 16
8 Transmittable torque to the tool shank and Max RPM .................................................................. 16
9 FAQ ............................................................................................................................................... 17
9.1 What is the difference between an EPB 5603 and an EPB 5403 holder? .............................. 17
9.2 Can I use an EPB 5603 or an EPB 5403 Shrinkfit holders for MQL? .................................. 17
9.3 What does the transformation of an EPB 5403 into an MQL holder consists in? ................. 17
9.4 Can DIN, BT, CAT holders be equipped for MQL? ............................................................. 17
9.5 What are the main differences between MQL1 and MQL2? ................................................ 18
Internal use only 4
2 Executive summary / Introduction
2.1 What is MQL?
MQL stands for “Minimum Quantity Lubrication”. This ‘near-dry” coolant solution consists in a mix
of air and oil, generating sort of an emulsion. It is an alternative to flood coolant systems. MQL coats
the interface “cutting edge/workpiece” with a thin film of lubricant and prevents heat build up through
friction reduction.
2.2 Advantages of MQL
This solution significantly reduces the volume of coolant used to lubricate machining operations:
• overall coolant costs reduced,
• keeps the machine environment and workpiece clean, reducing the need to clean workpieces,
• reduces the need for recycling coolant floods, as the volume used is very low compared to
conventional flood coolants and as it is mostly consumed in the cutting process,
• makes the recycling of chips easier, as no cleaning is needed,
• reduces the exposition of operators to chemicals.
2.3 Requirements to implement MQL
MQL needs a specific equipment to produce and deliver the emulsion:
- machine equipped with a MQL full equipment,
- suitable tool holders, equipped with specific coolant tubes and stop screws.
- tools with specific coolant channels and tapered tool shank designed according to standard
DIN 69090-3.
The standard DIN 69090-3 defines specific requirements for MQL1 standard holders, accessories and
tool shank shapes.
Internal use only 5
2.4 MQL1 and MQL2
MQL exists in 2 versions:
- MQL1: the ‘air and oil’ mix is produced before entering the spindle and delivered to the tool through
one channel (hence MQL1) that goes through the spindle, the tool holder and the tool.
HSK-A63: Conventional coolant tubes and MQL1 stop screws are needed.
HSK-A100: Specific MQL1 coolant tubes and MQL1 stop screws are needed.
- MQL2: the ‘air and oil’ mix is produced in the tool holder; The air and the oil are delivered through
2 distinct channels (hence MQL2) and are mixed in a chamber, in the MQL2 coolant tube. MQL2
coolant tubes, featuring a connecting pipe, and MQL2 stop screws are needed.
MQL1 COOLANT
SUPPLY
Oil and air mixture
externally
One channel
Oil + Air
Rotary
union Spindle
MQL Shrinkfit
holder
Stop
screw
MQL1
Coolant tube
MQL1
MQL2 COOLANT
SUPPLY
Oil and air supply through
2 independent channels
Oil Air
Rotary
union Spindle
MQL Shrinkfit
holder
Stop
screw
MQL2
Coolant tube
MQL2
Mixing chamber
Internal use only 6
3 Background
3.1 History
MQL exists since 1990 and has grown mostly in the automotive industry. It is now growing in the
aeronautic industry.
3.2 Market trends
The machining trend is in some areas moving in direction of dry machining, completely dry is not
always possible that’s the reason of using MQL.
The market is slowly growing nevertheless there is a clear direction started by automotive industry
now overlapping in the aerospace application.
We are losing market share against competitors having these products (mainly Guhring, Mapal …).
3.3 Potential
Even though competitors are well installed in the automotive industry, Seco is well positioned in the
aerospace industry, where the demand for MQL solutions is growing.
In a first stage, Seco will offer a range of MQL1 and MQL2 tool holders only. On the long run, Seco is
aiming at offering full MQL solutions (tool holders and tools).
The potential for MQL solutions is probably around 10% of the current sales of equivalent
conventional Shrinkfit holders.
Internal use only 7
4 EPB 5403/EPB 5403M/EPB 5403M1/EPB 5403M2
4.1 Tool holders: range summary and delivery content
The range will consist of three “MQL” types, declined from conventional DIN type Shrinkfit holders
(according to standard DIN 69882-8):
• EPB 5403/EPB 5603: Shrinkfit holders, not adapted to MQL (according to standard DIN
69882-8)
• “EPB 5403M”: Shrinkfit holders designed for MQL1 and 2,
delivered without MQL accessories (according to standard
DIN 69090-3)
• “EPB 5403M1”: Shrinkfit holders ready for MQL1, delivered
with MQL accessories mounted (according to standard DIN
69090-3)
• “EPB 5403M2”: Shrinkfit holders (according to standard
DIN 69090-3), ready for MQL2, delivered with MQL2
accessories mounted
EPB 5603 EPB 5403 EPB 5403M EPB 5403M1 EPB 5403M2
According to standard DIN 69882-8 (Shrinkfit holders) X X
Pre-adapted to MQL X
According to standard DIN 69090-3 (MQL) X X X
Coolant channels according to MQL norm X X X
MQL thread X X X
MQL laser marking X X X
Delivered with a stop end screw (DIN 69882-8) X (spare part) X (spare part)
Mounted with coolant tube for MQL1 No (accessories) X (spare part)
Mounted with a stop end screw for MQL1 No (accessories) X (spare part)
Mounted with coolant tube for MQL2 No (accessories) X (spare part)
Mounted with stop end screw for MQL2 No (accessories) X (spare part)
Delivered with user instructions X X X
Details about the different types are explained further in this document.
Internal use only 8
4.2 EPB 5403 DIN type Shrinkfit holders
Description
Example: E930454030680 (substitution to former E930456030680)
EPB 5403 Shrinkfit holders are very close to our range of EPB 5603 Shrinkfit holders. Both are
according to standard DIN69882-8.
- 100% same external shape,
- 100% same grip length and same transmittable torque.
Minor modifications have been made to the internal coolant channels (diameter modifications,
chamfers...), however, a ”new” EPB 5403 can be substituted to a former EPB 5603, without any
influence on the customer’s process. EPB 5403 can be shrunk on a Shrinkfit device with the same
program as for EPB 5603.
To allow easy transformation of EPB 5403 Shrinkfit holders into MQL holders, the specification of
HSK-A63 and HSK-A100 DIN type Shrinkfit holders have been slightly modified, resulting in the
creation of a new ”sub-family” EPB 5403, very similar to the existing EPB 5603 type.
Note: only HSK-A63 and HSK-A100 EPB 5603 are replaced by EPB 5403 holders. Other tapers
(HSK-A32, HSK-A40, DIN, BT…) remain unchanged.
Examples of changes between EPB 5603 and EPB 5403
E930454030680 E930456030680 Addition of a chamfer at the entrance
of the coolant channel
E9304540312120 E9304560312120 Slight changes in internal dimensions
(coolant channels).
Internal use only 9
4.3 EPB 5403M: DIN type Shrinkfit holders, designed for MQL
Example: E930454030680M (similar to E930454030680, with specific MQL characteristics)
‘M versions’ are DIN type Shrinkfit holders according to the norm DIN
69090-3, adapted for MQL1 and 2.
They are delivered without coolant tube nor stop screw. These accessories
must be ordered separately.
A MQL laser marking is added in their HSK V-flange, to differentiate them
MQL types Shrinkfit holders from DIN type Shrinkfit holders (according to
standard 69882-8). The ‘M’ designation is engraved on the tool holder (eg.
E930454030680M).
4.4 EPB 5403M1: DIN type Shrinkfit holders, equipped for MQL1
Example: E930454030680M1 (similar to E930454030680M,equipped with a MQL1 stop screw and
MQL1 coolant tube)
‘M1 versions’ are DIN type Shrinkfit holders according to the norm DIN
69090-3, designed for MQL1. It is a full solution, composed of a MQL1
toolholder along with suitable MQL1 accessories (coolant tube and stop
screw), mounted on the toolholder when delivered.
Only one combination “tool holder + stop screw + coolant tube” possible per
workpiece side diameter.
A MQL laser marking is added in their HSK V-flange, to differentiate them
MQL types Shrinkfit holders from DIN type Shrinkfit holders (according to standard 69882-8). The
‘M1’ designation is engraved on the tool holder (eg. E930454030680M1).
4.5 EPB 5403M2: DIN type Shrinkfit holders, equipped for MQL2
Example: E930454030680M2-1.9 (similar to E930454030680M,equipped with a MQL2 stop screw
and MQL2 coolant tube)
‘M2 versions’ are DIN type Shrinkfit holders according to the norm DIN 69090-3.
It is a full solution, composed of a toolholder along with suitable MQL2
accessories (coolant tube and stop screw), mounted on the toolholder when
delivered.
Several combinations “tool holder + stop screw + coolant tube” : the selection
is depending on the cutting tool (shank diameter, number and cross-section of
the coolant channels). See §7.1.
A MQL laser marking is added in their HSK V-flange, to differentiate them MQL types Shrinkfit
holders from DIN type Shrinkfit holders (according to standard 69882-8). The ‘M2’ designation is
engraved on the tool holder (eg. E930454030680M2-1.9).
Internal use only 10
5 Key codes
E9304 5403 0680 M1
E9304 5403 0680
E9304=HSK-A63
E9306=HSK-A100
DIN type Shrinkfit holders (same
family as EPB 5603 holders) Workpiece side
diameter Workpiece side
gauge length
E9304 5403 0680 M Designed for MQL1
and MQL2
Equipped for MQL1
(one combinaison « tool
holder +MQL1
accessories » possible)
E9304 5403 0680 M2-1.9
Equipped for MQL2
(several combinations
« tool holder +MQL2
accessories » possible)
External diameter
of the coolant
Tube*
*see explanations in paragraph “Tool holders and accessories for MQL2”
Internal use only 11
6 Tool holders and accessories for MQL1
6.1 Selection of accessories for MQL1
The selection of the appropriate MQL1 coolant tube and stop screw is easy: One possible combination
per tool holders.
6.1.1 Coolant tube E930x…
HSK-A63, MQL1 Shrinkfit holders use a conventional coolant tube 20E9304:
conventional Ø8 internal diameter is suitable for MQL solutions.
HSK-A100, MQL1 Shrinkfit holders use a specific coolant tube 20E9306M1: the
internal diameter is adapted to optimize the MQL flow (tapered from diameter 12
to diameter 8mm).
6.1.2 Stop screw 19MQL1xxx
Stop screw for MQL1 are adapted to MQL tool shank, according to DIN
69090-3.
For each tool shank diameters, 2 stop screws are available:
Short version 19MQL1xxS
Long version 19MQL1xxL
The choice between the short and the long version depends on the gauge length of the tool holder. See
correspondence tables in catalogue pages.
6.2 Tool holders: EPB 5403M or EPB 5403M1
Customers have the possibility to order MQL1 tool holders as:
• EPB 5403M: The appropriate stop screw and coolant tube must be ordered separately.
o already owns MQL1 accessories,
o wants to manage MQL1 accessories separately,
o wants to run test with one holder and several combination of accessories, before investing
in his final equipment.
o Content delivery: E930454031290M
• EPB 5403M1: The tool holder is delivered, assembled with the appropriate stop screw and coolant
tube.
o Easier solution.
o Content delivery: E930654031295M + 19MQL112S + 20E9306M1
Internal use only 12
7 Tool holders and accessories for MQL2
7.1 Selection of accessories for MQL2
An MQL2 solution is built up from a MQL tool holder equipped with MQL2 coolant tube and MQL2
stop screw.
7.1.1 Advice: refer to the Machining Navigator
An appropriate selection of the accessories is required to guaranty an efficient delivery of the coolant
mixture to the cutting edges. This chapter explain you the principle of the selection of accessories for
MQL2.
Note that a table is available in the Machining Navigator to make this selection easier. This table
features a list of tool holders along with coolant tubes and stop screws, and contains a “ADIF1”
attribute providing the section of the MQL coolant channel (see explanations in §7.1.4).
Internal use only 13
7.1.2 Coolant tube 20E930xM2xxx
MQL2 coolant tubes feature a tube, that is fitted in the stop screw to
warranty an optimal delivery of the MQL2 mix to the tool. A variety of
MQL2 coolant tubes is available, with different coolant channels
diameters and different pipe lengths. See more details in §7.1
Code key coolant tubes
7.1.3 Stop screw 19MQL2xxx
A variety of stop screws is available, with different coolant channels
diameters for each tool diameter.
Code key stop screws
Note: the code key by itself does not allow you to select the appropriate stop screw. You must refer to
the table in the machining navigator to match the appropriate coolant tube and stop screw.
20E9304 M2A 01
E9304=HSK-A63
E9306=HSK-A100
Code corresponding to the length
of the pipe
1=short
16=longest
For MQL2
Code corresponding to the internal
diameter of the pipe
A=smallest diameter
D=widest diameter
19MQL2A01
Code corresponding to the tool
shank diameter
1=smallest shank diameter
2=second smallest shank diameter
…
9=widest shank diameter
For MQL2
Code corresponding to the internal
diameter of the pipe
A=Ø2mm C=Ø4.1mm
B=Ø2.9mm D=Ø5.4mm
Internal use only 14
7.1.4 Selection of MQL2 accessories: principle
Basic principle
The selection of the appropriate MQL2 coolant tube and stop screw is based on the tool that is
mounted on the toolholder, and precisely on the dimension and number of coolant channels in the tool.
Step 1: Selection of the appropriate MQL2 coolant tube
To guaranty an optimal MQL flow delivery to the cutting edge, a cross-sectional ratio of 1:1 to 4:1
between the section of the tool coolant channels (Atool) and the section of the coolant tube’s pipe
(Atube) is required.
Atool ≤ Atube ≤ 4 x Atool
If several combinations are possible, it is recommended to privilege the combination with the ratio the
closest to 1:1, to optimize the MQL flow.
BD2 CND Section area ADIF1
1.9 mm 1.6 mm 2.01 mm²
2.8 mm 2.3 mm 4.15 mm² 4.0 mm 3.4 mm 9.08 mm²
5.3 mm 4.6 mm 16.62 mm²
Internal use only 15
Step 2: Selection of the appropriate MQL2 stop screw
Select the stop screw according to:
- the tool shank diameter,
- the selected coolant tube (see above): both the coolant tube and the stop screw must have the same
value for the attribute ADIF1 (referred to as “Atube”).
Four ADIF1 values are available: 2.01 mm², 4.15 mm², 9.08 mm², 16.62 mm².
Beware:
- for coolant tube, ADIF1 (indicated in the catalogue) corresponds to the cross section of the internal
diameter of the pipe of the coolant tube.
- for stop screw, ADIF1 (indicated in the catalogue) correspond to the cross section of the internal
diameter of pipe of the corresponding coolant tube, and NOT to the cross section of the stop screw’s
coolant channel.
CNDcoolant tube (mm) => ADIF1 (mm²)
Internal use only 16
7.2 Tool holders: EPB 5403M or EPB 5403M2
Customers have the possibility to order MQL2 tool holders as:
• EPB 5403M: The appropriate stop screw and coolant tube are meant to be ordered separately.
o Suitable for a customer who:
already owns MQL2 accessories,
wants to manage MQL2 accessories separately,
wants to run test with one holder and several combination of accessories, before
investing in his final equipment.
o Content delivery: E930454031290M
• EPB 5403M2: The tool holder is delivered with the appropriate stop screw and coolant tube.
o Easier solution.
o Content delivery:
E930654031495M2-1.9 (= E930654031495M + 19MQL2A05 +20E9306M2A01)
Transmittable torque and max rpm see Shrinkfit holders EPB 5603/5403.
8 Transmittable torque to the tool shank and Max RPM
The coolant mixture efficiency limits the maximum RPM for holders equipped for MQL1 and MQL2.
Transmittable torque to the tool shank (Nm) are the same for all types of EPB 5603 and EPB 5403
Shrinkfit holders, including MQL versions. Transmittable torque are defined by the standard DIN
69882-8.
Clamp Ø
(mm)
Min static
transmittable
torque (Nm)
DIN 69882-8
Shrinkfit clamping system Shrinkfit clamping
system Max RPM*
EPB 5603/EPB 5403 EPB 5403M1
EPB
5403M2
6 18 45000 16000 40000
8 35 45000 16000 40000
10 65 40000 16000 40000
12 110 40000 16000 40000
14 150 38000 16000 38000
16 200 38000 16000 38000
18 250 35000 16000 35000
20 320 35000 16000 35000
25 500 32000 16000 32000
32 550 30000 16000 30000
* The maximum RPM for holders equipped with this clamping system is often restricted by the
holder’s machine side taper type and size.
Internal use only 17
9 FAQ
9.1 What is the difference between an EPB 5603 and an EPB 5403 holder?
Both are designed according to the standard DIN 69882-8. An EPB 5603 can be directly replaced by
an EPB 5403 (exact same external shape).
EPB 5403 are pre-adapted to make it easier for Seco-EPB to transform them into MQL holders. Some
internal dimensions, not imposed by the standard DIN 69882-8, have directly been adapted to the
“MQL” standard DIN 69090-3.
9.2 Can I use an EPB 5603 or an EPB 5403 Shrinkfit holders for MQL?
EPB 5603/EPB 5403 are not designed according to the standard DIN 69090-3 for MQL. We can not
guaranty EPB 5603/EPB 5403 will work for MQL.
9.3 What does the transformation of an EPB 5403 into an MQL holder consists in?
• Internal modifications are made to the tool holder, eg. thread dimensions, to allow the
mounting of the MQL accessories. In addition to the changes mentioned in §9.1, modifications
are made to make the “EPB 5403M” fully according to the “MQL” standard DIN 69090-3.
• A laser marking is added in the HSK-A flange to differentiate MQL holders from
conventional holders.
• The laser marking of the designation of the product is changed into the final designation of the
product:
o EPB 5403M : eg. E930454030680 into E930454030680M,
o EPB 5403M1 : eg. E930454030680 into E930454030680M1,
o EPB 5403M1 : eg. E930454030680 into E930454030680M2-1.9.
• In the case of EPB 5403M, no stop screw is delivered with the tool holder (the one delivered
with the EPB 5403 is removed from the packaging).
• In the case EPB 5403M1 and EPB 5403M2, required MQL coolant tube and MQL stop screw
are assembled on the holder before delivery.
• MQL user instructions are added to the delivery content.
9.4 Can DIN, BT, CAT holders be equipped for MQL?
The standard DIN 69090-3 for MQL only applies to HSK-A holders.
Market demand for DIN/BT/CAT solutions remain anecdotic and would require an adaptation of the
whole chain “MQL unit/spindle/tool holder/tool.
Internal use only 18
9.5 What are the main differences between MQL1 and MQL2?
Aside the difference of equipment, each technologies has specific advantages:
MQL 1 MQL 2
Possible to change from a conventional coolant system to a
MQL1 system.
Does not allow to switch from a conventional coolant system
to a MQL2 system.
Can be implemented on multi-spindle machines. Very complicated to implement on multi-spindle machines.
The rotational speed influences the quality of the flow (the
flow must be adapted to the speed).
The rotational speed does not influence the quality of the flow
(same flow quality, dependless of the speed).
Modification of the coolant parameters (quantity of coolant,
ratio oil/air…) is very slow. Not convenient when quick tool
changes are necessary.
Fast adaptation to parameter changes. Suitable when quick
tool changes are needed.
Limited volumes/min of coolant can be delivered to the
tool (150ml/min).
Higher volumes/min can be delivered to the tool
(400ml/min).
Pressure 5 bars minimum required. Pressure 4 bars minimum required.
EPB 5403M EPB 5403M1 EPB 5403M2