KSB IE3 Installation instructions
Asynchronous Motor
KSB IE3-Motor
0.55 kW to 132 kW
2-pole, 4-pole
Installation/Operating Manual
Legal information/Copyright
Installation/Operating Manual KSB IE3-Motor
Original operating manual
All rights reserved. The contents provided herein must neither be distributed, copied, reproduced,
edited or processed for any other purpose, nor otherwise transmitted, published or made available to a
third party without the manufacturer's express written consent.
Subject to technical modification without prior notice.
© KSB SE & Co. KGaA, Frankenthal 15/12/2017
Contents
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Contents
1 General.................................................................................................................................................... 6
1.1 Principles ...........................................................................................................................................................6
1.2 Target group.....................................................................................................................................................6
1.3 Other applicable documents............................................................................................................................6
1.4 Symbols .............................................................................................................................................................6
2 Safety...................................................................................................................................................... 7
2.1 Key to safety symbols/markings.......................................................................................................................7
2.2 General..............................................................................................................................................................7
2.3 Intended use .....................................................................................................................................................8
2.4 Personnel qualification and training...............................................................................................................8
2.5 Consequences and risks caused by non-compliance with this manual .........................................................8
2.6 Safety awareness ..............................................................................................................................................8
2.7 Safety information for the user/operator.......................................................................................................8
2.8 Safety information for maintenance, inspection and installation ................................................................8
2.9 Unauthorised modes of operation..................................................................................................................9
2.10 Electromagnetic compatibility.........................................................................................................................9
3 Transport/Temporary Storage/Disposal............................................................................................. 10
3.1 Checking the condition upon delivery..........................................................................................................10
3.2 Transport.........................................................................................................................................................10
3.3 Storage/preservation......................................................................................................................................10
3.4 Disposal/recycling ...........................................................................................................................................11
4 Description............................................................................................................................................ 12
4.1 General description ........................................................................................................................................12
4.2 Designation.....................................................................................................................................................12
4.3 Name plate......................................................................................................................................................13
4.4 Types of construction .....................................................................................................................................13
4.5 Mounting arrangements................................................................................................................................14
4.6 Noise characteristics .......................................................................................................................................14
4.7 Balancing.........................................................................................................................................................14
5 Installation at Site................................................................................................................................ 15
5.1 Checks to be carried out prior to installation...............................................................................................15
5.2 Installing the motor........................................................................................................................................16
5.3 Electrical connection ......................................................................................................................................17
5.3.1 Motor connection inside the terminal box ......................................................................................17
5.3.2 Checking the direction of rotation ...................................................................................................19
5.4 Tightening torques.........................................................................................................................................20
5.5 Installing and removing output components...............................................................................................21
6 Commissioning/Start-up/Shutdown................................................................................................... 22
6.1 Checking earth conductor connection..........................................................................................................22
6.2 Checking insulation resistance.......................................................................................................................22
6.3 Prerequisites for commissioning/start-up......................................................................................................22
6.4 Start-up ...........................................................................................................................................................23
6.5 Operating limits..............................................................................................................................................23
6.5.1 Voltages and frequencies ..................................................................................................................23
6.5.2 Maximum permissible speed .............................................................................................................23
6.5.3 Ambient temperature........................................................................................................................23
6.5.4 Altitude...............................................................................................................................................23
6.6 Shutdown........................................................................................................................................................23
6.7 Idle periods .....................................................................................................................................................24
6.8 Returning to service .......................................................................................................................................24
7 Servicing/Maintenance........................................................................................................................ 25
7.1 Safety regulations...........................................................................................................................................25
Contents
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7.2 Maintenance/inspection.................................................................................................................................26
7.2.1 Supervision of operation ...................................................................................................................26
7.2.2 Inspection ...........................................................................................................................................27
7.3 Preparing disassembly....................................................................................................................................30
7.4 Dismantling the motor...................................................................................................................................30
7.4.1 General information/Safety regulations...........................................................................................30
7.4.2 Removing the protective roof (optional) .........................................................................................30
7.4.3 Dismantling the fan hood .................................................................................................................30
7.4.4 Dismantling the fan ...........................................................................................................................31
7.4.5 Dismantling the rotor ........................................................................................................................31
7.4.6 Dismantling the bearings ..................................................................................................................31
7.5 Assembling the motor....................................................................................................................................31
7.5.1 Fitting the bearings ...........................................................................................................................32
7.5.2 Installing the rotor.............................................................................................................................32
7.5.3 Mounting the fan ..............................................................................................................................32
7.5.4 Mounting the fan hood.....................................................................................................................32
7.5.5 Mounting the protective roof (optional) .........................................................................................32
8 Trouble-shooting.................................................................................................................................. 33
9 EU Declaration of Conformity............................................................................................................. 34
Index ..................................................................................................................................................... 35
Glossary
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Glossary
Drive end
End of motor with bare shaft end for connecting
the machine to be driven via a coupling or traction
sheave and belt (driven output or machine
element).
Non-drive end
End of motor with fan and fan hood.
1 General
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1 General
1.1 Principles
This operating manual is supplied as an integral part of the type series and variants
indicated on the front cover. The manual describes the proper and safe use of this
equipment in all phases of operation.
The name plate indicates the type series, the main operating data and the serial
number. The serial number uniquely describes the product and is used as
identification in all further business processes.
In the event of damage, immediately contact your nearest KSB service centre to
maintain the right to claim under warranty.
1.2 Target group
This operating manual is aimed at the target group of trained and qualified specialist
technical personnel.
1.3 Other applicable documents
Table1: Overview of other applicable documents
Document Contents
Operating manual(s) for the
pump(s)
Proper and safe use of the pump in all phases of
operation
Wiring diagram Electrical connection
For accessories and/or integrated machinery components, observe the relevant
manufacturer's product literature.
1.4 Symbols
Table2: Symbols used in this manual
Symbol Description
✓Conditions which need to be fulfilled before proceeding with the
step-by-step instructions
⊳Safety instructions
⇨Result of an action
⇨Cross-references
1.
2.
Step-by-step instructions
Note
Recommendations and important information on how to handle
the product
2 Safety
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2 Safety
!DANGER
All the information contained in this section refers to hazardous situations.
2.1 Key to safety symbols/markings
Table3: Definition of safety symbols/markings
Symbol Description
!DANGER
DANGER
This signal word indicates a high-risk hazard which, if not avoided,
will result in death or serious injury.
!WARNING
WARNING
This signal word indicates a medium-risk hazard which, if not
avoided, could result in death or serious injury.
CAUTION
CAUTION
This signal word indicates a hazard which, if not avoided, could
result in damage to the machine and its functions.
General hazard
In conjunction with one of the signal words this symbol indicates a
hazard which will or could result in death or serious injury.
Electrical hazard
In conjunction with one of the signal words this symbol indicates a
hazard involving electrical voltage and identifies information about
protection against electrical voltage.
Machine damage
In conjunction with the signal word CAUTION this symbol indicates
a hazard for the machine and its functions.
2.2 General
This operating manual contains general installation, operating and maintenance
instructions that must be observed to ensure safe operation of the system and
prevent personal injury and damage to property.
The safety information in all sections of this manual must be complied with.
The operating manual must be read and understood by the responsible specialist
personnel/operators prior to installation and commissioning.
The contents of this operating manual must be available to the specialist personnel
at the site at all times.
Information attached directly to the product must always be complied with and kept
in a perfectly legible condition at all times. This applies to, for example:
▪Markings for connections
▪Name plate
The operator is responsible for ensuring compliance with all local regulations not
taken into account in this operating manual.
This electric motor has been designed and constructed in accordance with the
requirements of Directive 2014/35/EU (“Low-voltage Directive”). It is intended for use
in industrial plants.
If the motor is used in countries outside the European Community, adhere to the
regulations applicable to the relevant country. Also observe any local and industry-
specific regulations governing installation and safety.
2 Safety
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2.3 Intended use
▪This product must only be operated within the limit values stated in the technical
product literature for the mains voltage, mains frequency, ambient temperature,
motor rating, speed, density, pressure, temperature and in compliance with any
other instructions provided in the operating manual or other applicable
documents.
▪The product must not be used in potentially explosive atmospheres.
2.4 Personnel qualification and training
All personnel involved must be fully qualified to transport, install, operate, maintain
and inspect the product this manual refers to. The responsibilities, competence and
supervision of all personnel involved in installation, operation, maintenance and
inspection must be clearly defined by the operator.
Deficits in knowledge must be rectified by means of training and instruction
provided by sufficiently trained specialist personnel. If required, the operator can
commission the manufacturer/supplier to train the personnel.
Training on the product must always be supervised by specialist technical personnel.
2.5 Consequences and risks caused by non-compliance with this manual
▪Non-compliance with these operating instructions will lead to forfeiture of
warranty cover and of any and all rights to claims for damages.
▪Non-compliance can, for example, have the following consequences:
–Hazards to persons due to electrical, thermal, mechanical and chemical
effects and explosions
–Failure of important product functions
–Failure of prescribed maintenance and servicing practices
–Hazard to the environment due to leakage of hazardous substances
2.6 Safety awareness
In addition to the safety information contained in this manual and the intended use,
the following safety regulations shall be complied with:
▪Accident prevention, health regulations and safety regulations
▪Safety regulations for handling hazardous substances
▪Applicable standards, directives and laws
2.7 Safety information for the user/operator
▪The operator shall fit contact guards for hot, cold and moving parts and check
that the guards function properly.
▪Do not remove any contact guards during operation.
▪Provide the personnel with protective equipment and make sure it is used.
▪Eliminate all electrical hazards. (In this respect refer to the applicable national
safety regulations and/or regulations issued by the local energy supply
companies.)
2.8 Safety information for maintenance, inspection and installation
▪Modifications or alterations of the pump are only permitted with the
manufacturer's prior consent.
▪Use only original spare parts or parts authorised by the manufacturer. The use of
other parts can invalidate any liability of the manufacturer for resulting damage.
▪The operator ensures that maintenance, inspection and installation is performed
by authorised, qualified specialist personnel who are thoroughly familiar with
the manual.
2 Safety
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▪Any work on the product shall only be performed when it has been disconnected
from the power supply (de-energised).
▪Carry out work on the product during standstill only.
▪As soon as the work has been completed, re-install and re-activate any safety-
relevant devices and protective devices. Before returning the product to service,
observe all instructions on commissioning.
2.9 Unauthorised modes of operation
Never operate the product outside the limits stated in the data sheet and in this
manual.
The warranty relating to the operating reliability and safety of the product supplied
is only valid if the product is used in accordance with its intended use.
2.10 Electromagnetic compatibility
When operating the motor on a frequency inverter always observe the frequency
inverter manufacturer's information on compliance with the Electromagnetic
Compatibility Directive. Take additional measures to ensure compliance with the
Directive and obtain a connection approval from the local energy supply company, if
necessary.
3 Transport/Temporary Storage/Disposal
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3 Transport/Temporary Storage/Disposal
3.1 Checking the condition upon delivery
1. On transfer of goods, check each packaging unit for damage.
2. In the event of in-transit damage, assess the exact damage, document it and
notify KSB or the supplying dealer and the insurer about the damage in writing
immediately.
3.2 Transport
DANGER
Improper transport
Danger to life from falling parts!
▷Only transport the motor in the specified position.
▷Always use all lifting lugs available at the motor during transport.
▷Always screw in lifting lugs (lifting eyebolts) up to the contact face and tighten.
▷Use suitable, permitted lifting accessories.
Only remove any transport locks provided prior to commissioning and store or
disable. Use transport locks for additional transport tasks or re-enable.
To transport motors weighing more than 25 kg, suspend them from the lifting tackle
as shown.
Fig.1: Transporting the motor by two lifting lugs attached to sides of motor housing
3.3 Storage/preservation
Exposed metal parts Exposed locating surfaces (shaft ends, flange faces, centring spigots, connector
contacts) are treated with a layer of temporary corrosion protection (< 6 months) for
transport. Take suitable corrosion protection measures for extended storage periods.
Storage period Rotate the shaft once annually to avoid permanent standstill markings. Extended
storage periods decrease the service life (increase ageing) of the grease applied to
the rolling element bearings.
Closed rolling element
bearings
Replace closed rolling element bearings after 48 months of storage.
3 Transport/Temporary Storage/Disposal
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Outdoor storage
CAUTION
Damage during storage due to humidity, dirt or vermin
Corrosion/contamination of the drive!
▷Cover all components with water-proof material. Covers or tarpaulins must not
contact the surface of the stored goods.
▷Ensure sufficient air circulation, e.g. by inserting wooden spacers.
▷To ensure protection against ground moisture, arrange motors and packaged
motors on pallets, bars or foundations.
▷Prevent the possibility of product sinking into the ground.
Implement appropriate measures to accommodate extreme climatic conditions, e.g.
salty, dusty or moist atmospheres.
Indoor storage
Storage rooms provide protection against extreme weather conditions and must be
dry, dust-free, frost-free, jolt-free, vibration-free and well-ventilated.
3.4 Disposal/recycling
Due to some components, the product is classified as special waste.
1. Dismantle the product.
2. Separate and sort the materials, e.g. by:
- Metals
- Plastics
- Electronic waste
- Greases and other lubricants
3. Dispose of materials in accordance with local regulations or in another
controlled manner. PCBs, power electronics, capacitors and electronic
components are all hazardous waste.
4 Description
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4 Description
4.1 General description
Low-voltage asynchronous motor of efficiency class IE3 to IEC 60034-30 for operation
on the public power grid or on a frequency inverter.
4.2 Designation
Table4: Designation example
Position
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
- 2 - 4 5 , 0 - 2 2 5 M - B W A 6 F 3 N T S D W F U W K S W
Table5: Designation key
Position Code Description
1-2 Number of poles
2 2 poles
4 4 poles
4-7 Rated power
4 5 , 0 45 kW (0.55 ... 45.0 kW)
9-12 IEC size
2 2 5 M Shaft centreline height [mm] = IEC size
14 Enclosure
B IP55
15 Type of protection
W Non-explosionproof
16 Rated voltage and rated frequency
A 3~, AC, 220 VΔ, 380 VY, 50Hz
17 Efficiency class
6 IE3
18 Thermal class
F Thermal class F
19 Motor and winding protection
3 3 PTCs
20 Direction of rotation
N Clockwise and counter-clockwise (bi-directional)
21 Position of terminal box
T Terminal box on top
22 Feet attached by bolts
S Feet attached by bolts
W Without feet
H Integrally cast feet
23 Position of fixed bearing
D Fixed bearing, drive end
24 Protective roof
W Without protective roof
25 Motor flange
F EN 50347 Type FF
W Without flange
26 Operation on inverter
U Operation on inverter permitted
27 Approval
4 Description
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Position Code Description
27 W Without approvals
28-29 Manufacturer
K S KSB
30 Manufacturer type
W KSB IE3 Motor
4.3 Name plate
The name plate provides, as a minimum, the following information:
▪Manufacturer: KSB SE & Co. KGaA, Johann-Klein-Straße 9, 67227 Frankenthal
▪KSB material number
▪Type designation: KSB IE3 Motor
▪Year of construction
▪Number of phase windings
▪Standards for design
▪Enclosure
▪Efficiency class to IEC60034-30
▪Thermal class
▪Rated power/ rated powers
▪Rated voltage/ rated voltages
▪Rated frequency/ rated frequencies
▪Rated current/ rated currents
▪Rated speed/ rated speeds
▪Rated power factor/ rated power factors
▪Total weight
4.4 Types of construction
The motors are available in different types of construction:
Table6: Types of construction and installation variants
Type of construction Shaft centreline
height
[mm]
IM codes
Flange type1) With
foot
None ✘71 to 315 B3
Flange with clearance
holes (FF)
- 71 to 112 V1, B5
✘132 to 315 V152), B35
1) Designations to EN50347
2) Detachable feet
4 Description
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4.5 Mounting arrangements
IM codes Illustration
IM B3
IM B5
IM B35
IM V1
IM V15
4.6 Noise characteristics
The noise characteristics stipulated by DINEN60034-9 are complied with.
4.7 Balancing
The rotor is balanced dynamically in accordance with the ISO1940-1 standard. The
rotor is balanced to balance quality grade G2.5.
The motor complies with vibration class A to IEC60034-14.
Marking
▪For motors with key, the rotors are balanced dynamically with a half key ("H") as
standard in accordance with ISO21940-32 requirements. The output element
must also be balanced with a half key in accordance with the key convention.
5 Installation at Site
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5 Installation at Site
5.1 Checks to be carried out prior to installation
Place of installation
WARNING
Installation on mounting surface which is unsecured and cannot support the load
Personal injury and damage to property!
▷Use a concrete of compressive strength class C12/15 which meets the
requirements of exposure class XC1 to EN206-1.
▷The mounting surface must be set, flat, and level.
▷Observe the weights indicated.
1. Check the structural requirements.
All structural work required must have been prepared in accordance with the
dimensions stated in the outline drawing/general arrangement drawing.
Installation altitude (ðSection6.5.4,Page23)
Protective roof/additional roofing
Install a protective roof or additional roofing for vertical installation.
Vertical installation ▪For vertical installation with the shaft end pointed downwards to prevent
foreign objects from falling into the fan hood.
▪For vertical installation with the shaft end pointed upwards to prevent fluid
ingress along the length of the shaft.
Outdoor installation Shield the motor by implementing suitable protection measures in order to prevent
condensation from forming and to avoid the long-term effects caused by direct
exposure to sunlight, rain, snow, ice and dust.
Flatness tolerance of contact surfaces
For foot-mounted motors, adhere to the following flatness tolerance of the contact
surfaces for the motor feet.
Table7: Flatness tolerance of contact surfaces for motor feet
Shaft centreline height Flatness tolerance (mm)
≤132mm 0,10
≥ 160mm 0,15
Ventilation
WARNING
Improper installation
Drive overheated!
▷Maintain the specified minimum distances to neighbouring assemblies.
▷Never restrict the ventilation ducting to/from the drive.
▷Prevent exhaust air from neighbouring assemblies from being drawn in directly.
5 Installation at Site
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X
Fig.2: Minimum distanceX
Table8: Minimum distanceX to neighbouring assemblies
Motors with shaft centreline height [mm] Minimum distanceX [mm]
71 - 100 30
112 - 132 40
160 - 180 50
200 - 225 60
5.2 Installing the motor
Checks prior to installation work
▪Repair any damage to the paintwork. (ðSection7.2.2.1,Page28)
▪Remove any anti-corrosives applied to exposed metal parts that are required to
ensure proper assembly or installation.
Alignment and fastening
NOTE
Maintain the vibration levels to ISO 10816-1 during operation.
Observe the following when aligning and fastening:
▪Ensure that the motor feet are resting evenly on the support surface.
▪Ensure that feet and flanges are mounted as specified in the manual.
▪Avoid rigid couplings.
▪Ensure precise alignment for direct coupling.
▪Ensure that mounting surfaces are free from contamination.
▪Avoid resonances caused by the structure at the rotational frequency and double
mains frequency.
▪Unusual noise that may occur when rotating the rotor by hand.
Compensation of radial
misalignment at the
coupling and horizontal
adjustment
The following measures are required to compensate radial misalignment at the
coupling and horizontally adjust the motor in relation to the driven machine (e.g. the
pump):
▪Vertical positioning
To avoid distortion (warping) of the driven machine and the motor, place thin
metal sheets under the motor feet.
The number of shims should be restricted to a minimum, in other words, they
should only be stacked if this is unavoidable.
▪Horizontal positioning
For horizontal positioning, laterally shift the motor on the foundation while
maintaining axial alignment (to prevent angular misalignment).
Ensure a uniform circumferential axial clearance at the coupling when
positioning.
▪Smooth running characteristics
A stable, vibration-free foundation to DIN4024, exact alignment of the coupling
and a well-balanced output element (coupling, pulley, fan, etc.) are prerequisites
5 Installation at Site
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KSB IE3-Motor
for smooth, vibration-free operation of the motor.
Complete balancing of the motor with the output element may be required.
Note the information and evaluation criteria to ISO 10816.
▪Foot/flange mounting
Use the thread sizes specified by EN 50347 for fastening the foot and flange of
the motor to the foundation and to the motor flange respectively. Fasten the
motor at four foot holes or flange bolt holes positioned in rectangular
arrangement to each other. The customer is responsible for selecting the
strength of the fastening elements.
Property class recommendations: Class5.6 or higher for fastening elements for
motors with shaft centreline height up to and including 160 mm, and class 8.8 or
higher for motors with shaft centreline height 180 mm.
NOTE
Lifting lugs that have been screwed in must either be tightened or removed after
installation.
5.3 Electrical connection
DANGER
Hazardous voltage
Danger of death from electric shock!
▷Have all work performed only by qualified specialist personnel and only when
the drive is at a standstill and secured against unintentional start-up. This also
applies to auxiliary circuits (e.g. standstill heater).
▷The drive must not be electrically connected at any point in time when work is
performed on the open terminal box.
WARNING
Incorrect connection to the mains
Damage to the mains network, short circuit!
▷Observe the technical specifications of the local energy supply companies.
NOTE
Always protect three-phase motors with a current-dependent overload protection
device with additional phase failure protection.
Select the motor connection cables in accordance with IEC60364, taking into account
the current load of the cable at the given ambient temperature and the requisite
heat dissipation to IEC/EN60204-1 as a result of cable routing.
5.3.1 Motor connection inside the terminal box
Observe the following when performing any work on the terminal box:
▪Always use the original sealing element to close the terminal box so that it is dust
tight and watertight.
▪Do not damage any components inside the terminal box, such as terminal board
and cable connections.
▪Ensure that no foreign matter, contamination or moisture are present in the
terminal box. Terminal box cable entries to DIN42925.
5 Installation at Site
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▪Close additional open cable entries, using O-rings or suitable gaskets.
▪Observe prescribed tightening torques for cable glands and other screws/bolts.
▪When retrofitting cable glands to safeguard the required level of enclosure
protection, ensure that the gasket is seated properly on the outside of the
terminal box.
Connecting the motor
1. Check the electrical voltage of the available power supply network against the
data on the motor name plate.
2. Connect the earth conductor (PE).
3. Knock out any knock-out openings in the terminal box. While doing this, avoid
causing damage to the terminal board, cable connections, etc. inside the
terminal box.
4. Connect the motor in star configuration or delta configuration in accordance
with the rated voltage (see name plate) and the available power supply
network. Alternatively, the 6-core connection of the three windings can be
connected to an external switchgear for automatic switchover.
Fig.3: Star configuration
Fig.4: Delta configuration
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KSB IE3-Motor
ðThe terminal boards of motors with shaft centreline heights of 80mm and
90mm may differ from the schematic shown. In this case, star configuration
or delta configuration is selected by setting jumpers.
5. Optionally, the 2-core connection of the series-connected PTC thermistors for
temperature monitoring of the motor can be connected to terminals 1T1 and
1T2 with a suitable thermistor relay (PTC thermistor tripping unit). Observe the
maximum measuring voltage!
Changing the jumpers
Fig.5: Jumper position
1. Disengage the red locking lever (1) and pull the jumper (2) out of the slot.
2. Undo the snap hook at the storage pocket and take out the jumper (3).
3. Push the jumper (3) into the slot until it rests on the bottom. Engage the locking
lever again.
4. Place the jumper (2) into the storage pocket and engage the snap hook.
5.3.2 Checking the direction of rotation
WARNING
Parts flying off
Personal injury and damage to property!
▷When checking the direction of rotation with the coupling removed, secure the
respective keys to protect them from being thrown off.
The motors are configured for clockwise and anti-clockwise rotation as standard.
Select the drive's direction of rotation to match the direction of rotation required by
the driven centrifugal pump.
Clockwise rotation Connecting the power cables in the phase sequence U1, V1, W1 to L1, L2, L3 of the
power supply network results in clockwise rotation (looking at the drive shaft end).
Anti-clockwise rotation Interchanging two connections, e.g. V1, U1, W1 to L1, L2, L3 results in anti-clockwise
rotation.
5 Installation at Site
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5.4 Tightening torques
Unless other tightening torques are indicated on the motor the following torques
shall be used:
Table9: Tightening torques for terminal board connections
Thread Tightening torque
[Nm]
M4 2,0
M5 3,0
M6 5,0
M8 10
Table10: Tightening torques for terminal board fastening elements
Thread Tightening torque
[Nm]
M4 2,0
M5 4,0
M6 9,0
M8 23
Table11: Tightening torques for terminal box cover
Thread Tightening torque
[Nm]
M5 4,0
M6 7,0
M8 19
M10 37
M12 63
Table12: Tightening torques for strain relief fasteners
Thread Tightening torque
[Nm]
M12 1,5
M16 2,0
M20 4,0
M25 4,0
M32 6,0
M40 6,0
M50 6,0
M63 8,0
Table13: Tightening torques for earth conductor, bearing cover, fan hood, foot in
aluminium material variant
Thread Tightening torque
[Nm]
M4 2,0
M5 4,5
M6 7,5
M8 19
M10 37
M12 64
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