SCHUNK KSF3 User instructions

Translation of Original Operating Manual
TANDEM Clamping Force Block
KSF3, KSF3-LH, KSF3-F
Assembly and Operating Manual

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Imprint
Copyright:
Imprint
This manual is protected by copyright. The author is SCHUNK GmbH & Co. KG. All rights
reserved.
Technical changes:
We reserve the right to make alterations for the purpose of technical improvement.
Document number: 1467140
Version: 02.00 | 04/01/2022 | en
Dear Customer,
thank you for trusting our products and our family-owned company, the leading
technology supplier of robots and production machines.
Our team is always available to answer any questions on this product and other solutions.
Ask us questions and challenge us. We will find a solution!
Best regards,
Your SCHUNK team
Customer Management
Tel. [phone]
Fax [phone]
[email protected]
Please read the operating manual in full and keep it close to the product.

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Table of Contents
Table of Contents
1General .................................................................................................................... 5
1.1 About this manual...................................................................................................5
1.1.1 Presentation of Warning Labels .................................................................5
1.1.2 Applicable documents ................................................................................5
1.1.3 Sizes ............................................................................................................6
1.2 Warranty .................................................................................................................6
1.3 Scope of Delivery ....................................................................................................6
2
Basic
safety notes ...................................................................................................
7
2.1
Intended use.........................................................................................................
7
2.2
Not intended use ..................................................................................................
7
2.3
Constructional changes ........................................................................................
7
2.4
Spare parts ...........................................................................................................
7
2.5
Use of special chuck jaws .....................................................................................
7
2.6
Environmental and operating conditions .............................................................
8
2.7
Personnel qualification.........................................................................................
8
2.8
Personal protective equipment ............................................................................
9
2.9
Notes on safe operation .......................................................................................
9
2.10 Transport...............................................................................................................10
2.11 Malfunctions .........................................................................................................10
2.12 Disposal .................................................................................................................10
2.13 Fundamental dangers ...........................................................................................10
2.13.1 Protection during handling and assembly................................................10
2.13.2 Protection during commissioning and operation.....................................11
2.13.3 Protection against dangerous movements ..............................................11
2.13.4 Notes on particular risks...........................................................................12
3Technical data ........................................................................................................ 14
4Tightening torques for screws................................................................................. 18
5Assembly and connection ....................................................................................... 19
5.1 Assembly of the Clamping Block on the machine table .......................................19
5.2 Connecting the clamping force block ...................................................................21
5.2.1 Supply lines and lubrication lines .............................................................22
5.2.2 Dynamic pressure monitoring of the jaw end positions (variant "PM")
................................................................................................................ 22
5.2.3 Air coupling in top jaw (variant "PM").................................................... 23
5.2.4 Pneumatic circuit diagram........................................................................25
6Troubleshooting ..................................................................................................... 26

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Table of Contents
7Maintenance and care ............................................................................................ 28
7.1 Notes .....................................................................................................................28
7.2 Maintenance and lubrication intervals.................................................................28
7.3 Greasing areas / lubricants ...................................................................................28
7.4 Maintenance work................................................................................................29
7.4.1 Lubrication................................................................................................29
7.4.2 Basic cleaning............................................................................................30
7.4.3 Adjustment of the pneumatic jaw end position monitoring (PM)...........33
7.4.4 Leak test....................................................................................................33
8Sealing kits, accessory kits and parts lists................................................................ 35
8.1 Sealing kit lists.......................................................................................................35
8.1.1 Piston chamber sealing kit........................................................................35
8.1.2 Monitoring sealing kit / connection .........................................................35
8.2 Accessory kits........................................................................................................36
8.3 Parts lists ...............................................................................................................36
9Assembly drawings ................................................................................................. 40
9.1 KSF3, KSF3-LH........................................................................................................40
9.2 KSF3-F....................................................................................................................41
10 Translation of the original declaration of incorporation .......................................... 42
11 Appendix on Declaration of Incorporation, as per 2006/42/EC, annex II, No. 1 B..... 43

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General
1General
1.1 About this manual
This manual contains important information for a safe and
appropriate use of the product.
This manual is an integral part of the product and must be kept
accessible for the personnel at all times.
Before starting work, the personnel must have read and
understood this operating manual. Prerequisite for safe working is
the observance of all safety instructions in this manual.
Illustrations in this manual are provided for basic understanding
and may differ from the actual product design.
Inadditiontotheseinstructions,thedocumentslisted
under } 1.1.2 [ / 5] are applicable.
1.1.1 Presentation of Warning Labels
To make risks clear, the following signal words and symbols are
used for safety notes.
DANGER
Danger for persons!
Non-observance will inevitably cause irreversible injury or death.
WARNING
Dangers for persons!
Non-observance can lead to irreversible injury and even death.
CAUTION
Dangers for persons!
Non-observance can cause minor injuries.
CAUTION
Material damage!
Information about avoiding material damage.
1.1.2 Applicable documents
•General terms of business *
•Catalog data sheet of the purchased product *
The documents marked with an asterisk (*) can be downloaded on
our homepage schunk.com

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General
1.1.3 Sizes
This operating manual applies to the following sizes:
•KSF3 100, 160, 250
•KSF3-LH 100, 160, 250
•KSF3-F 100, 160, 250
1.2 Warranty
The warranty period is 24 months after delivery date from factory
or 500 000 cycles*, if it is used as intended, under the following
conditions:
•Observe the applicable documents, } 1.1.2 [/ 5]
•Observe the ambient conditions and operating
conditions, } 2.6 [/ 8]
•Observance of the specified care and maintenance
instructions } 7 [/ 28]
Parts touching the workpiece and wear parts are not included in
the warranty.
* A cycle consists of a complete clamping process ("Open" and
"Close").
1.3 Scope of Delivery
Clamping force block
KSF3 or KSF3-LH plus or KSF3-F
(without top jaws)
ACCESSORY KIT:
(for contents, see sealing kit list and parts list) } 8.1 [/ 35]

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Basic safety notes
2Basic safety notes
2.1 Intended use
•This product is intended for clamping and holding workpieces
on machine tools and other suitable technical devices.
•It is designed to be set up on a machine table or machine
pallets.
•
The product may only be used within the scope of its technical
data, } 3 [ / 14].
•The product is intended for industrial and industry-oriented use.
•Appropriate use of the product includes compliance with all
instructions in this manual.
2.2 Not intended use
The product is not being used as intended if, for example:
•It is used as lifting equipment, as a press, as a punching tool, as
a lathe chuck, as a drill, or as a cutting tool.
•It is used in working environments that are not permissible.
•Workpieces are not properly clamped.
•Safety regulations are disregarded and persons are working at
this product (for example, to machine clamped workpieces)
without additional protective equipment.
•The technical data specified by the manufacturer are exceeded
during usage.
•It is used with machines/systems or workpieces that are not
designed to be used with it.
2.3 Constructional changes
Implementation of structural changes
By conversions, changes, and reworking, e.g. additional threads,
holes, or safety devices can impair the functioning or safety of the
product or damage it.
•Structural changes should only be made with the written
approval of SCHUNK.
2.4 Spare parts
Use of unauthorized spare parts
Using unauthorized spare parts can endanger personnel and
damage the product or cause it to malfunction.
•Use only original spare parts or spares authorized by SCHUNK.
2.5 Use of special chuck jaws
Requirements of the chuck jaws

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Basic safety notes
When using special chuck jaws, please observe the following rules:
•The chuck jaws should be designed to be as low as possible.The
clamping point must be as close as possible to the housing.
(clamping points at a greater distance cause higher surface
pressures in the jaw guidance and can significantly reduce the
clamping force.)
•Do not use welded jaws.
•Reduce operating pressure for higher clamping points.
2.6 Environmental and operating conditions
Required ambient conditions and operating conditions
Incorrect ambient and operating conditions can make the product
unsafe, leading to the risk of serious injuries, considerable material
damage and/or a significant reduction to the product's life span.
•
Make sure that the productis used only in the context of its
defined application parameters, } 3 [ / 14].
•Make sure that the product is a sufficient size for the
application.
•Ensure that maintenance and lubrication intervals are
observed,
} 7 [ / 28].
•Ensure that the environment is free from ferromagnetic
particles or chips.
2.7 Personnel qualification
Inadequate qualifications of the personnel
If the personnel working with the product is not sufficiently
qualified, the result may be serious injuries and significant
property damage.
•All work may only be performed by qualified personnel.
•Before working with the product, the personnel must have read
and understood the complete assembly and operating manual.
•Observe the national safety regulations and rules and general
safety instructions.
The following personal qualifications are necessary for the various
activities related to the product:
Trained electrician Due to their technical training, knowledge and experience, trained
electricians are able to work on electrical systems, recognize and
avoid possible dangers and know the relevant standards and
regulations.

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Basic safety notes
Qualified personnel Due to its technical training, knowledge and experience, qualified
personnel is able to perform the delegated tasks, recognize and
avoid possible dangers and knows the relevant standards and
regulations.
Instructed person Instructed persons were instructed by the operator about the
delegated tasks and possible dangers due to improperbehaviour.
Service personnel of
the manufacturer
Due to its technical training, knowledge and experience, service
personnel of the manufacturer is able to perform the delegated
tasks and to recognize and avoid possible dangers.
2.8 Personal protective equipment
Use of personal protective equipment
Personal protective equipment serves to protect staff against
danger which may interfere with their health or safety at work.
•When working on and with the product, observe the
occupational health and safety regulations and wear the
required personal protective equipment.
•Observe the valid safety and accident prevention regulations.
•Wear protective gloves to guard against sharp edges and
corners or rough surfaces.
•Wear heat-resistant protective gloves when handling hot
surfaces.
•Wear protective gloves and safety goggles when handling
hazardous substances.
•Wear close-fitting protective clothing and also wear long hair in
a hairnet when dealing with moving components.
2.9 Notes on safe operation
Incorrect handling of the personnel
Incorrect handling and assembly may impair the product's safety
and cause serious injuries and considerable material damage.
•Avoid any manner of working that may interfere with the
function and operational safety of the product.
•Use the product as intended.
•Observe the safety notes and assembly instructions.
•Do not expose the product to any corrosive media. This does
not apply to products that are designed for special
environments.
•Eliminate any malfunction immediately.
•Observe the care and maintenance instructions.
•Observe the current safety, accident prevention and
environmental protection regulations regarding the product's
application field.

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Basic safety notes
2.10 Transport
Handling during transport
Incorrect handling during transport may impair the product's
safety and cause serious injuries and considerable material
damage.
•When handling heavy weights, use lifting equipment to lift the
product and transport it by appropriate means.
•Secure the product against falling during transportation and
handling.
•Stand clear of suspended loads.
2.11 Malfunctions
Behavior in case of malfunctions
•Immediately remove the product from operation and report the
malfunction to the responsible departments/persons.
•Order appropriately trained personnel to rectify the
malfunction.
•Do not recommission the product until the malfunction has
been rectified.
•Test the product after a malfunction to establish whether it still
functions properly and no increased risks have arisen.
2.12 Disposal
Handling of disposal
The incorrect handling of disposal may impair the product's safety
and cause serious injuries as well as considerable material and
environmental harm.
•Follow local regulations on dispatching product components for
recycling or proper disposal.
2.13 Fundamental dangers
•Observe safety distances.
•Never deactivate safety installations.
•Before commissioning the product, take appropriate protective
measures to secure the danger zone.
•Disconnect power sources before installation, modification,
maintenance, or calibration. Ensure that no residual energy
remains in the system.
•Do not reach into the open mechanism or movement area of
the product during operation.
2.13.1 Protection during handling and assembly
Incorrect handling and assembly

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Basic safety notes
Incorrect handling and assembly may impair the product's safety
and cause serious injuries and considerable material damage.
•Have all work carried out by appropriately qualified personnel.
•For all work, secure the product against accidental operation.
•Observe the relevant accident prevention rules.
•Use suitable assembly and transport equipment and take
precautions to prevent jamming and crushing.
Incorrect lifting of loads
Falling loads may cause serious injuries and even death.
•Stand clear of suspended loads and do not step intotheir
swiveling range.
•Never move loads without supervision.
•Do not leave suspended loadsunattended.
2.13.2 Protection during commissioning and operation
Falling or violently ejected components
Falling and violently ejected components can cause serious injuries
and even death.
•Take appropriate protective measures to secure the danger
zone.
•Never step into the danger zone during operation.
2.13.3 Protection against dangerous movements
Unexpected movements
Residual energy in the system may cause serious injuries while
working with the product.
•Switch off the energy supply, ensure that no residual energy
remains and secure against inadvertent reactivation.
•Never rely solely on the response of the monitoring functions
(dynamic pressure monitoring with pressure sensors) to avert
danger. Assume that the drive movement is faulty as long is the
installed monitors are not effective, since the effect depends on
the control and the current operating state of the drive.
Perform maintenance, modification and attachment work
outside of the danger zone defined by the movement range.
•To avoid accidents and/or material damage, human access to
the movement range of the machine must be restricted. Limit/
prevent accidental access for people in this area due through
technical safety measures. The protective cover and protective
fence must be rigid enough to withstand the maximum possible
movement energy. EMERGENCY STOP switches must be easily
and quickly accessible. Before starting up the machine or

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Basic safety notes
automated system, check that the EMERGENCY STOP system is
working. Prevent operation of the machine if this protective
equipment does not function correctly.
2.13.4 Notes on particular risks
WARNING
Risk of injury in the event of workpiece loss due to component
failure on the product as a result of exceeding the technical
data.
•The product may only be used within the scope of its technical
data
WARNING
Risk of injury due to immediate closing of the product with high
spring force in the event of pneumatic pressure failure.
•Ensure stable compressed air supply
•Use pressure maintenance valves
WARNING
Risk of injury in the event of workpiece loss due to failure or
pressure reduction of the compressed air.
•Ensure stable compressed air supply
•Use pressure maintenance valves
WARNING
Risk of injury from falling parts during transport, assembly and
disassembly of the product and its accessories.
•Use suitable load handling equipment for transport
•Do not remain in the danger zone
•Wear protective equipment (protective shoes)
WARNING
Danger of crushing due to the chuck jaws approaching the
workpiece during the clamping procedure when loading and
unloading manually.
•Prioritize automated loading
•Do not reach between the workpiece and the chuck jaw
during the clamping procedure

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Basic safety notes
WARNING
Risk of injury due to accidental actuation when working on the
product
•Disconnect the power supply when working on the product
CAUTION
Ergonomic risk to the musculoskeletal system when lifting and
transporting the product using manual force.
•Use load handling equipment for lifting and transporting
CAUTION
Allergic reactions or irritation due to skin or eye contact with
lubricants on the product.
•In case of foreseeable contact with lubricants on the product
(e.g. when lubricating or cleaning), wear protective equipment
(protective gloves, protective goggles)

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Technical data
3Technical data
Installation position any
Operating temperature +5°C to +60°C
Noise emission [dB(A)] ≤70
Pressure medium Compressed air, compressed air quality according to ISO
8573-1: 7:4:4
Max. speed 100 RPM
Designation
KSF3
100
160
250
Stroke per jaw [mm]
2
3
5
Clamping force range* [kN]
7 - 12
20 - 30
37 - 50
Opening pressure [bar]
6 - 9
6 - 9
6 - 9
Repeat accuracy** [mm]
0.01
0.01
0.02
Max. jaw height [mm]
60
60
150
Weight [kg]
4.3
12.5
39.4
Designation
KSF3-LH
100
160
250
Stroke per jaw [mm]
6
8
15
Clamping force range without turbo* [kN]
3 - 5
9 - 15
14 - 21
Clamping force range with turbo (6 bar)*
[kN]
8 - 11
22 - 34
33 - 46
Opening pressure [bar]
6 - 9
6 - 9
6 - 9
Max. turbo pressure [bar]
6
6
6
Repeat
accuracy** [mm]
0.01
0.01
0.02
Max. jaw height [mm]
150
200
500
Weight [kg]
4.4
12.7
39.6
Designation
KSF3-F
100
160
250
Stroke per jaw [mm]
4
6
10
Clamping force range* [kN]
7 -12
20 - 30
37 - 50
Opening pressure [bar]
6 - 9
6 - 9
6 - 9
Repeat accuracy** [mm]
0.01
0.01
0.02
Max. jaw height [mm]
60
60
150
Weight [kg]
4.3
12.6
39.4

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Technical data
* Clamping force is the arithmetic sum of the individual forces occurring at the
chuck jaws at distance "H" (see also catalog).
The maximum clamping force is achieved in the open position.
The min. clamping force is applied shortly before the closed position.
** End position spread after 100 consecutive strokes.
Dependency clamping force to jaw stroke
Clamping
force
Jaw position
Opened
Closed

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Technical data
Dimensions of the product
1
Optional Z variant ±0.01 mm to clamping center
2
Clamping sleeve ±0.04 mm to clamping center
3
Fitting screw ±0.02 mm to clamping center
4
Only with variant "PM"

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Technical data
Dimension
KSF3 / KSF3-LH / KSF3-F
100
160
250
A
90
146
230
B
64
106
154
Ø C
6H7 x 12
8H7 x 14
10H7 x 20
D
80
125
200
E
29.5
50
75
F
32
40
64
G
34.5
59.7
92.6
H
55
82
139.6
I
64
104
170
J
69.2
82.2
98.2
K
36
42
52
L
10
15
20
M
59
100
150
N
M8
M10
M12
O
15
18
20
P
4
4
5
Ø Q
10f7
12f7
14f7
Ø R
11
13
16
S
4.5
6
6
T
54
84
140
U
18.7
29
54
V
40
67
104
W
9.5
12
18
X
43
72
115
Y
6
5
20
Z
4.5
0
0
HF
19.8
29.8
39.8
ØDF
97.7
156
246

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Tightening torques for screws
4Tightening torques for screws
Tightening torques for mounting the clamping system on the
machine table (screw quality 10.9)
Screw size
M4
M5
M6
M8
M10
M12
M14
M16
M18
M20
M22
M24
Tightening torque
MA (Nm)
4.2
7.5
13
28
50
88
120
160
200
290
400
500
Tightening torques for mounting top jaws on the TANDEM
clamping force block (screw quality 12.9)
Screw size
M4
M5
M6
M8
M10
M12
M14
M16
M20
M24
Tightening torques
MA (Nm)
5
9
15
32
62
108
170
262
510
880
Tightening torques for mounting the chuck piston onto the
cylinder piston (screw quality 12.9)
Size
100
160
250
Designation
Screw size
M8
M10
M12
KSF3
Tightening torque
MA (Nm)
32
62
108
KSF3-LH
Tightening torque
MA (Nm)
32
62
140
KSF3-F
Tightening torque
MA (Nm)
25
50
90
Tightening torques for mounting the cover on the body (screw
quality A2-70)
Size
100
160
250
Screw size
M5
M5
M6
Tightening torque MA (Nm)
3
4.5
7

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Assembly and connection
5Assembly and connection
The numbers shown for individual components refer to the
illustrations for assembly or connections of the clamping force
block and to the "Assembly Drawings" chapter.
} 9 [ / 40]
WARNING
Danger of crushing due to the product approaching the machine
table during assembly
•Do not reach between the product and machine table during
assembly
CAUTION
Danger of abrasions due to rough components of the product
and its accessories, which may slip out of your hands during
assembly.
•Wear protective equipment (protective gloves) when working
on the product and when handling its accessories
5.1 Assembly of the Clamping Block on the machine table
34
Cylindrical pins Ø m6(see parts lists [ / 000])
82
Fitting screw Ø f7 (see parts lists [ / 000])
84
Screw DIN EN ISO 4762
85
Clamping sleeve DIN EN ISO 13337

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Assembly and connection
NOTE
•For vertical installation, the openings of the coolant drain (V)
must always face downwards
•Surface "X" is parallel to the guideway of the base jaws (item 2)
in order to be able to align the clamping force block on the
machine table or check the positioning.
Assembly with clamping sleeves:
Mount the clamping force block on the machine table together
with clamping sleeves (item 85) and screws (item 84).
Assembly with fitting screws:
There are two fittings in the housing (item 1) that, along with the
fitting screws (item 82), are used to center the clamping force
block on the machine table with repeat accuracy. Do not realign
the clamping force block after removing it from the machine table
(e.g. after replacing the seals). When using fitting screws (item 82),
these are used instead of the clamping sleeves (item 85) and two
of the four screws (item 84).
Mounting with cylindrical pins (Z variant):
The clamping force block is fastened to the machine table with 4
screws (item 84). The two cylindrical pins (item 34) are used for
alignment with repeat accuracy. Do not realign the clamping force
block after removing it from the machine table (e.g. after replacing
the seals).