SCHUNK ROTA-S plus 2.0 User instructions

Translation of the original manual
Manual chuck
ROTA-S plus 2.0 with jaw lock
Assembly and Operating Manual
Superior Clamping and Gripping

Imprint
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07.00|0889002_ROTA-S plus 2.0 with jaw lock |en-US
Imprint
Copyright:
This manual is protected by copyright. The author is SCHUNK GmbH & Co. KG. All rights
reserved.
Technical changes:
We reserve the right to make technical improvements.
Document number: 0889002
Version: 07.00 |2/24/2021|en-US
Dear Customer
Dear Customer,
Thank you for putting your trust in 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.
We look forward to your challenging questions. We will find a solution!
Best regards,
Your SCHUNK team
H.-D. SCHUNK GmbH & Co.
Spanntechnik KG
Lothringer Str. 23
D-88512 Mengen
Tel. [phone]
Fax [phone]
[email protected]
schunk.com
Customer Management
Tel. [phone]
Fax [phone]
customercentermenge[email protected]k.com
Please read the operating manual in full and keep it close to the product.

Table of Contents
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3
Table of Contents
1
About this Manual.................................................................................................... 5
1.1
Illustration of safety notes ....................................................................................... 5
1.2
Applicable documents .............................................................................................. 6
2
Basic safety notes..................................................................................................... 7
2.1
Appropriate use........................................................................................................ 7
2.2
Inappropriate use ..................................................................................................... 7
2.3
Notes on particular risks........................................................................................... 8
2.4
Notes on safe operation......................................................................................... 10
2.4.1
Structural changes ...................................................................................... 14
2.5
Personnel qualification........................................................................................... 14
2.6
Organizational measures........................................................................................ 14
2.7
Personal protective equipment.............................................................................. 15
3
Warranty................................................................................................................. 16
4
Screw tightening torques......................................................................................... 16
5
Scope of delivery ..................................................................................................... 16
6
Technical data ......................................................................................................... 17
6.1
Chuck data .............................................................................................................. 17
6.2
Clamping force RPM diagrams ............................................................................... 18
6.3
Calculating the clamping force and RPM ............................................................... 22
6.3.1
Calculation of the required clamping force at a specified speed of rotation
..................................................................................................................... 22
6.3.2
Calculation example: required initial clamping force Fsp0 for a given RPM n
..................................................................................................................... 24
6.3.3
Calculation of the permissible speed of rotation nperm in case of a given
initial clamping force Fsp0 .......................................................................... 25
6.4
Accuracy classes ..................................................................................................... 26
6.5
Permitted imbalance .............................................................................................. 26
7
Attachment of the manual lathe chuck .................................................................... 27
7.1
Handling prior to attachment................................................................................. 27
7.2
Preparing the chuck attachment............................................................................ 27
7.3
Assembly of the manual lathe chuck ..................................................................... 28
8
Function .................................................................................................................. 29
8.1
Handling and jaw change ....................................................................................... 29
8.2
Important notes...................................................................................................... 31
8.3
Checking the chuck................................................................................................. 32
8.4
True running check................................................................................................. 33

Table of Contents
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9
Maintenance ........................................................................................................... 35
9.1
Disassembling and assembling the chuck .............................................................. 35
9.2
Jaw change ............................................................................................................. 37
9.3
At least once a month ............................................................................................ 37
9.4
In the case of decreasing clamping force or after about 200 operating hours ..... 38
9.5
Maintenance intervals............................................................................................ 38
10
Disposal .................................................................................................................. 39
11
Spare parts.............................................................................................................. 40
12
Assembly drawing ................................................................................................... 41

About this Manual
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5
About this Manual
This manual contains important information for the safe, correct
use of the product.
The manual is an integral part of the product and must be kept
accessible by personnel at all times.
Personnel must have read and understood this manual before
beginning any work. The observance of all safety notes in this
manual is the precondition for all safe working.
The illustrations in this manual are intended to provide a basic
understanding and may deviate from the actual version.
Besides this manual, other documents which apply are those listed
under (1.2, Page 6).
Illustration of safety notes
To make risks clear,the following signal words and symbols are
used for safety notes.
DANGER
Danger to individuals!
Ignoring a safety note such as this will certainly lead to
irreversible injury and even death.
WARNING
Danger to individuals!
Ignoring a safety note such as this can lead to irreversible injury
and even death.
CAUTION
Danger to individuals!
Non-observance can cause minor injuries.
NOTICE
Material damage!
Information about avoiding material damage.
1
1.1

About this Manual
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Applicable documents
•General terms and conditions *
•Catalog data sheet for purchased product *
•Calculation of the jaw centrifugal forces, in the chapter
"Technology" of the lathe chuck catalog *
The documents indicated with an asterisk (*) can be downloaded
from schunk.com.
1.2

Basic safety notes
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7
Basic safety notes
Improper handling, assembly and maintenance of this product may
result in risk to persons and equipment if this operating manual is
not observed.
Report any failures and damage immediately and repair without
delay to keep the extent of the damage to a minimum and prevent
compromising the safety of the product.
Only original SCHUNK spare parts may be used.
Appropriate use
This product is intended for clamping workpieces on lathes and
other suitable machine tools.
•The product may only be used within the scope of its technical
data, (6, Page 17).
•The product is intended for industrial and industry-oriented
use.
•Appropriate use of the product includes compliance with all
instructions in this manual.
•The maximum speed and the necessary clamping force must be
determined by the operator for each clamping task in
accordance with the valid standards or technical specifications
of the manufacturer.
(Also see "Calculation for clamping force and speed of rotation"
in chapter "Technical data".) (6, Page 17)
Inappropriate use
The product is not being used as intended if, for example:
•it is used as a press, a punch, a toolholder, a load-handling
device or as lifting equipment.
•the product is used with machines/systems or workpieces that
are not designed to be used with it.
•the specified technical data for use of the product are
exceeded. (6, Page 17)
•workpieces are not properly clamped, paying particular
attention to the specified clamping forces.
•the product is used in working environments that are not
permissible.
•the product is operated without protective equipment.
2
2.1
2.2

Basic safety notes
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Notes on particular risks
This product may pose a danger to persons and property if, for
example:
•it is not used as intended;
•it is not installed or maintained properly;
•the safety and installation instructions, local applicable safety
and accident prevention regulations or the EC Machinery
Directive are not observed.
DANGER
Possible risk of fatal injury to operating personnel if a jaw
breaks or if the chuck fails because the technical data have been
exceeded and a workpiece is released or parts fly off!
•The technical data specified by the manufacturer for using the
lathe chuck must never be exceeded.
•The lathe chuck may only be used on machines and facilities
that fulfill the minimum requirements of the EC Machinery
Directive; specifically, they must have effective technical
measures to protect against possible mechanical hazards.
DANGER
Risk of fatal injury to operating personnel from clothing or hair
being caught on the lathe chuck and being dragged into the
machine!
Loose clothing or long hair may become caught on projecting
parts of the lathe chuck and be drawn into the machine.
•The machines and equipment must fulfill the minimum
requirements of the EC Machinery Directive; specifically, they
must have effective technical measures to protect against
potential mechanical hazards.
•Always wear tight-fitting clothing and a hairnet when working
on the machine and the lathe chuck.
2.3

Basic safety notes
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9
WARNING
Risk of injury due to dropping the chuck during transport,
installation or removal.
•Take special care in the danger zone when transporting,
installing or removing the lathe chuck.
•Note the relevant load securing regulations for working safely
with cranes, ground conveyors, lifting gear and load-handling
equipment.
CAUTION
Risk of slipping or falling if the chuck's operational environment
is not clean (e.g. contaminated with cooling lubricants or oil).
•Ensure that the working environment is clean before starting
assembly and installation work.
•Wear suitable safety boots.
•Follow the safety and accident prevention regulations when
operating the chuck, especially when working with machine
tools and other technical equipment.
CAUTION
Risk of limbs being crushed when opening and closing the chuck
jaws during manual loading or unloading or when exchanging
moving parts.
•Do not reach between the chuck jaws.
•Wear protective gloves.
•Follow the safety and accident prevention regulations when
operating the chuck, especially when working with machine
tools and other technical equipment.
CAUTION
Risk of burns due to workpieces with high temperatures!
•Wear protective gloves when removing the workpieces.
•Automatic loading is preferred.

Basic safety notes
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CAUTION
Risk of damage due to incorrect choice of clamping position for
chuck jaws on workpiece.
If an incorrect clamping position is chosen for the chuck jaws on
workpiece, the base and top jaws may break.
•Make sure that the workpiece is clamped concentrically.
•If the chuck has a quick-change jaw system, the top jaws must
not protrude beyond the base jaws in the radial direction.
Exception: The supporting jaw variant 3 protrudes beyond the
chuck base jaw due to its design. In this case, the T-nuts
always need to be completely inserted into the groove of the
chuck base jaw.
CAUTION
Hazard from vibration due to imbalanced rotating parts and
noise generation.
Physical and mental strains due to imbalanced workpieces and
noise during the machining process on the clamped and rotating
workpiece.
•Ensure the chuck's axial and concentric runout.
•Check options for remedying imbalances on special top jaws
and workpieces.
•Reduce the RPM.
•Wear hearing protection.
Notes on safe operation
•Do not start the machine spindle until the workpiece is
clamped and the spanner wrench has been removed from the
chuck.
•Only operate the lathe chuck when all protective equipment
has been fitted and is in full working order.
•Check the lathe chuck at least once per shift for externally
visible damage and faults.
Functional test
After installation of the lathe chuck, its function must be checked
prior to start-up:
2.4

Basic safety notes
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11
•Clamping force! At max. torque, the maximum clamping force
specified for the lathe chuck must be reached.
•Indicator pin! Never clamp or switch on the lathe when the
indicator pin is protruding. (Golden pin on the chuck's shell).
•Jaw lock! The spindle can only be turned when all the chuck
jaws have been fitted into the T-slot. This prevents the wedge
bars from being brought into the working position without
chuck jaws.
Speed of rotation
DANGER
Possible risk of fatal injury to operating personnel if the lathe
chuck's top speed of rotation is exceeded and a workpiece is
released or parts fly off.
If the machine tool or technical equipment can reach a higher
speed of rotation than the lathe chuck's top speed of rotation, a
reliable speed limiter must be installed and proof must be
provided that the speed limiter is effective.
WARNING
Vibrations caused by machining can lead to a loss of clamping
force. Risk of injury due to loss of workpiece.
Manually actuated lathe chucks can lose clamping force due to
the vibration caused by machining the workpiece.
•Regularly adjust the lathe chuck during machining to
compensate for loss of clamping force caused by vibrations.
Maintenance instructions
The reliability and safety of the manual lathe chuck can only be
guaranteed if the operator complies with the maintenance
instructions from the manufacturer.
•For lubrication, we recommend our tried and tested special
grease, LINOMAX plus. Unsuitable lubricants can have a
negative impact on the functioning of the lathe chuck (clamping
force, coefficient of friction, wear characteristics).
(For product information about LINOMAX plus, see the
"Accessories" chapter of the SCHUNK lathe chuck catalog or
contact SCHUNK.)

Basic safety notes
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•Use a suitable high-pressure grease gun to ensure that you
reach all the greasing areas.
•To ensure correct distribution of the grease, move the lathe
chuck to its end positions several times, lubricate again, and
then check the clamping force.
•We recommend checking the clamping force using a gripping
force tester before starting a new production run and between
maintenance intervals. *Optimum safety can only be
guaranteed through regular checks*.
•The clamping force should always be measured in the state of
the lathe chuck as used for the current clamping situation. If
top jaws with clamping steps are used, measuring must be
performed in the same step as for the respective clamping task.
In the event of high operating speeds, clamping force losses
must be accounted for due to the centrifugal force acting on
the chuck jaws. In this case the value of the operating clamping
force should be measured dynamically.
•Move the lathe chuck through to its end position several times
after 500 clamping strokes, at the latest. (This moves the
lubricant back to the surfaces of the force transmission. so that
the clamping force is retained for longer).
Safety notes for servicing
Follow all the applicable legal standards for health and safety
during servicing. Use suitable personal protective equipment,
especially protective gloves, goggles, and safety boots - paying
particular attention to the operating system and hazard
assessment.
Immediately report any changes including changed operational
behavior to the competent units/persons; if necessary,
immediately shut down and secure the machine on which the
lathe chuck is mounted. Do not start up the machine that the
chuck is mounted on again until the malfunction has been
eliminated.

Basic safety notes
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13
DANGER
Possible risk of fatal injury to operating personnel due to
toolholder failure if the maintenance and servicing instructions
for the toolholder are disregarded.
The servicing instructions specified by the manufacturer must be
complied with to ensure safe operation of the lathe chuck.
Work must be carried out by qualified specialist personnel with
the relevant safety training.
Use of special chuck jaws
When using customized jaws, please observe the following rules:
•The chuck jaws should be designed to be as light and as low as
possible. The clamping point must be as close as possible to the
chuck face (clamping points at a greater distance lead to
greater surface pressure in the jaw guidance and can
significantly reduce the clamping force).
•Do not use welded jaws.
•If for constructional reasons the special chuck jaws are heavier
than the top jaws assigned to the clamping device, greater
centrifugal forces must be accounted for when defining the
required clamping force and the recommended speed.
•Screw the jaw mounting bolts into the bore holes furthest
apart.
•The maximum recommended speed may only be applied in
conjunction with the maximum clamping force and only with
the lathe chuck in optimum, fully functioning condition.
•If the lathe chuck is involved in a collision, it must be subjected
to a crack test before using it again. Damaged parts must be
replaced with original SCHUNK spare parts.
•Renew the chuck jaw mounting bolts if there are signs of wear
or damage. Only use bolts with a quality of 12.9.

Basic safety notes
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Structural changes
Implementation of structural changes
Modifications, changes or reworking, e. g. additional threads,
holes, or safety devices, can damage the product or impair its
functionality or safety.
•Structural changes should only be made with the written
approval of SCHUNK.
Personnel qualification
The lathe chuck must only be installed, removed, started up,
operated and serviced by qualified specialist personnel with the
relevant safety training.
All persons charged with operating, maintaining and servicing this
lathe chuck must have access to the operating manual, especially
the chapter "Basic safety instructions". We recommend that the
operator draw up in-house safety operating instructions.
Trainees may work on machines and technical equipment in which
a lathe chuck is installed provided that they are supervised at all
times by qualified specialist personnel.
Organizational measures
Obeying the rules
Via suitable organizational measures and instructions, the
operator must ensure that the relevant safety rules are obeyed by
the persons asked to operate, maintain and repair the lathe chuck.
Monitoring the behavior of personnel
The operator must at least occasionally check that the personnel
are behaving in a safety-conscious manner and are aware of the
potential hazards.
Danger signs
The operator must ensure that the signs concerning safety and
hazards mounted on the machine where the lathe chuck is
mounted are clearly legible and are observed.
2.4.1
2.5
2.6

Basic safety notes
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15
Faults
If a fault occurs on the lathe chuck and this fault endangers safety
or if a problem is suspected due to production characteristics, the
machine tool where the lathe chuck is mounted must be
immediately stopped and remain shut down until the fault has
been located and remedied. Only allow specialists to remedy
malfunctions.
Spare parts
Only ever use original SCHUNK spare parts.
Environmental regulations
Comply with the applicable legal norms when disposing of waste.
Personal protective equipment
Use of personal protective equipment
Personal protective equipment serves to protect staff in the event
of a danger that 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.
2.7

Technical data
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Warranty
If the product is used as intended, the warranty is valid for 60
months from the date of delivery from the production facility or 50
000 cycles* under the following conditions:
•Refer to the applicable documents, (1.2, Page 6)
•Observance of the ambient conditions and operating
conditions.
•Observance of the specified maintenance and lubrication
intervals (9, Page 35)
Parts touching the workpiece and wearing parts are not part of the
warranty.
* One cycle comprises one complete clamping procedure
("opening" and "closing").
Screw tightening torques
Tightening torques for mounting screws for clamping the chuck
(screw quality 10.9)
Screw size
M6
M8
M10
M12
M14
M16
M18
M20
M22
M24
M27
M30
Tightening torques
MA(Nm)
13
28
50
88
120
160
200
290
400
500
1050
1500
Tightening torques to mount top jaws onto the chuck (screw
quality 12.9)
Screws for base jaws SFG
/ SFGK / SFK-V / SFGL /
SFGX
M6
M8 x 1
fine
thread
M1
0
M12 x
1.5
fine
thread
-
M16 x
1.5
fine
thread
M2
0
-
M2
4
maximum admissible
torque in (Nm)
16
30
60
85
-
105
180
-
230
Scope of delivery
1
Manual lathe chuck (complete)
either with cylindrical recess and fixing screws
or with corresponding flange and accessories for machine
spindle according to
–DIN ISO 702-1 Short-taper mount with screws from the front
–DIN ISO 702-2 Short-taper mount with camlock mounting
–DIN ISO 702-3 Short-taper mount with bayonet mounting
1
Spanner wrench
1
Operating manual
3
4
5

Technical data
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17
Technical data
Chuck data
ROTA-S plus 2.0
3-jaw chuck
2-jaw chuck
160-42
200-52
250-62
315-92
160-42
200-52
250-62
315-92
Max. torque [Nm]
80
120
210
220
55
80
140
150
Stroke per jaw [mm]
6.5
7.0
7.7
9.9
6.5
7
7.7
9.9
Recommended speed
[RPM]
5400
4800
4200
3400
5400
4800
4200
3400
Max. jaw clamping force
[kN]
65
100
160
180
40
65
105
120
Mass moment of inertia [kg
m2]
0.029
0.091
0.249
0.758
0.033
0.1
0.276
0.8196
Chuck bore [mm]
42
52
62
92
42
52
62
92
Weight without jaws [kg]
7.94
16.1
28.8
54.2
8.5
18.2
30.4
60.5
Centrifugal force of the
base jaw
with fine serration
McGB [kgm]
For the ROTA-S plus 2.0 chuck, it is necessary to specifically
determine this data.
Examples of calculation can be found in the "Chuck jaws in
special design/technology" chapter in our current chuck jaw
catalog.
Max. jaw eccentricity of
center of gravity in axial
direction amax [mm]
The maximum RPM stated is only valid with the maximum
clamping force and when using the hard standard stepped jaws
that go with the chuck.
For soft top jaws or jaws in special design jaws the speed
permitted for the cutting task must be calculated in accordance
with VDI 3106 whereby the max. recommended speed may not be
exceeded. The calculated values must be checked by dynamic
measurement. Functional monitoring must be performed
according to the guidelines of the insurance association.
The recommended speed is valid for ROTA-S plus 2.0 with
SCHUNK stepped block jaws, hard, type STF.
For this, the base jaws are inserted flush with outer diameter of
the chuck.
6
6.1

Technical data
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3-jaw chuck
2-jaw chuck
Jaw type
STF 160
STF 200
STF 250
STF 315
STF 160
STF 200
STF 250
STF 315
Weight/set
1.1 kg
1.9 kg
3.3 kg
5.3 kg
0.73 kg
1.27 kg
2.2 kg
3.5 kg
The speed of rotation must be reduced for jaws with a higher
weight!
Max. oscillating circle - With type SFG base jaws
ROTA-S plus 2.0
160-42
200-52
250-62
315-92
Oscillating circle Ø
208.5
264
323
401.5
At the rated speed the chucks are balanced to Q 6.3
Warranty and maximum clamping cycles
Length of warranty
60 months
Maximum clamping cycle number
50,000 cycles
Clamping force RPM diagrams
Clamping force/RPM curves have been determined by using hard
jaws. In the determination process, the maximum actuating force
was applied and the jaws were set flush with the outer diameter of
the chuck.
The chuck is in perfect condition and lubricated with SCHUNK
LINOMAX plus special grease.
Should one or several of above-mentioned parameters be
changed, the diagrams will no longer be valid.
Chuck setup for clamping force/RPM graph
FspB
Jaw clamping force
S
Center of gravity
Fs
Center of gravity radius
amax
Max. jaw eccentricity of
center of gravity in axial
direction
Fmax
Max. actuating force
6.2

Technical data
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19
Clamping force RPM diagram ROTA-S plus 2.0 160-42 - 3 jaws
Clamping force RPM diagram, ROTA-S plus 2.0 200-62 - 3 jaws
Clamping force RPM diagram ROTA-S plus 2.0 250-52 - 3 jaws

Technical data
20
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Clamping force RPM diagram, ROTA-S plus 2.0 315-92 - 3 jaws
Clamping force RPM diagram ROTA-S plus 2.0 160-42 - 2 jaws
Clamping force RPM diagram, ROTA-S plus 2.0 200-62 - 2 jaws