Festo CLR User manual

en Operating
instructions
8072624
2017-05e
[8072626]
linear/swivel clamp
CLR

CLR
2Festo – CLR – 2017-05e
Original instructions
Identification of hazards and instructions on how to prevent them:
Danger
Immediate dangers which can lead to death or serious injuries
Warning
Hazards that can cause death or serious injuries
Caution
Hazards that can cause minor injuries
Other symbols:
Note
Material damage or loss of function
Recommendations, tips, references to other documentation
Essential or useful accessories
Information on environmentally sound usage
Text designations:
 Activities that may be carried out in any order
1. Activities that should be carried out in the order stated
– General lists
èResult of an action/References to more detailed information

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Festo – CLR – 2017-05e English 3
Linear swivel clamp type CLR-...
1 Operating elements and connections
For all available product documentation èwww.festo.com/pk
1
2
3
4
5
67
1Compressed air connection for clamping
2Guide bolt for motion control of the
linear and swivel movements
3Compressed air connection for releasing
4Groove for proximity switch
5Clamping finger set with clamping
screw (not included in delivery)
6Spanner flat on the piston rod
7Flange screws with threaded holes for
fastening
Bild 1

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2 Function
When the compressed air connections are
pressurized alternately, the piston rod of the
linear-swivel clamp type CLR-... moves in and
out. On the piston rod there is a guide sleeve
with three different grooves. A guide bolt in
the housing grips into the groove. By means
of the special shape of the grooves, the bolt
transfers the following movements to the
piston rod:
– swivel-linear movement of 90° in a
clockwise direction (Bild 2)
– swivel-linear movement of 90° in an anti-
clockwise direction (Bild 3)
– linear movement (with CLR-40-... to
CLR-63-..., see Bild 4).
The piston rod transfers the swivel and linear
movements to the clamping finger. When the
piston rod retracts, the clamping finger
clamps material against a fixed stop. The
end positions are scanned in the sensor
grooves on the cylinder profile.
3 Application
The CLR-... has been designed for friction-locked clamping and holding of
construction parts.
Please note
Torques which affect the internal guide sleeve will damage the CLR-...
SWith all assembly work make sure that the maximum torque on the guide
sleeve is not exceeded (see chapter “Mechanical installation”).
Bild 2 Bild 3
Bild 4

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Festo – CLR – 2017-05e English 5
4 Transport and storage
STake into account the weight of the product (plus clamping finger and fasten
ing elements).
Depending on the design the CLR-... can weigh up to 2.7 kg.
SEnsure the following storage conditions:
– short storage times and
– cool, dry and shady storage locations to prevent corrosion.
5 Conditions of use
Please note
Incorrect handling can result in malfunctions.
SEnsure that the specifications in this chapter are always observed.
This is the only way to ensure correct and safe operation of the product.
SCompare the limit values specified in these operating instructions with your
current application (e.g. pressures, forces, torques, temperatures, masses,
speeds, clamping cycles).
Only if the loading limits are observed can the CLR-... be operated in
accordance with the relevant safety guidelines.
SObserve the specifications applicable to your location, as well as all local and
national laws and regulations.

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SRemove the packing except for the adhesive labels on the compressed air
connections (to prevent dirt).
It is intended that the packaging be recycled on the basis of its constituent
materials (exception: oiled paper = other waste).
SObserve the ambient conditions at your location.
SMake sure there is a supply of correctly prepared compressed air (see chapter
“Technical specifications”).
SUse the same medium composition throughout the service life of the product.
Example:
– selected: non-lubricated compressed air,
– continue to use: non-lubricated compressed air.
If switching from lubricated to non-lubricated compressed air:
SObserve the wear of the CLR-...
If the service life lubrication is washed out, the CLR-... will wear considerably.
SGradually pressurise the entire system until the operating pressure is reached.
This ensures that all actuator movement is controlled.
The soft-start valve type HEL-... or HEM-.... can be used to build up the pres
sure gradually.
SUse the CLR-... in its original state without undertaking any modifications.

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Festo – CLR – 2017-05e English 7
6 Installation
Mechanical installation
Please note
When the fastening screw of the clamping
finger is clamped and released, high torques
can damage the guide sleeve in the cylinder
(e.g. by tightening or counter holding).
SWhen fitting or removing the clamping
finger, always use a spanner wrench for
counter holding (see “Fitting the
clamping finger”).
STreat the clamping finger with great care.
The following loadings are not permitted:
– heavy loads with a long lever arm
– sudden knocks
– high torques (especially on the guide
sleeve).
SMake sure that the maximum permitted loadings are observed during
operation:
– the tightening torques when fitting the clamping fingers
– the values for force F and torque M (see chapter “Technical specifications”).
Fitting the clamping finger
Please note
Torques which affect the internal guide sleeve will damage the CLR-...
SFit the clamping finger first, before fitting the clamping cylinder into the
system. In this way you will prevent torques rom affecting the internal guide
sleeve.
Bild 5
Bild 6

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1. Place the clamping finger on the cone of
the piston rod.
2. Screw the fastening screw into the
threaded hole of the piston rod until the
clamping finger can still just be turned.
3. Fix the piston rod at the spanner flat 6
with a spanner wrench (see Bild 8).
4. Turn the clamping finger with a second
spanner wrench until the alignment
corresponds to the individual application.
5. Tighten the fastening screw with the
following torque:
For counter holding, the maximum
permitted torque on the guide sleeve
must not be exceeded.
CLR-... 12 16 20 25 32 40 50 63
Thread M3 M4 M6 M6 M8 M8 M10 M10
Width across flats (A/F)
– clamping finger screw
– piston rod
2.5
5
3
7
5
10
5
10
6
13
6
13
8
17
8
17
Tightening torque of clam
ping finger screw [Nm]
1.2 3 12 12 24 24 47 47
Maximum permitted torque
on the guide sleeve [Nm]
2 3 6 10 20 20 30 50
Bild 10
Bild 7
Bild 8
6
Bild 9

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In order to modify the swivel movement:
1. Unscrew and remove completely the
guide bolt from the cylinder housing of
the CLR-... The piston rod can then be
turned freely with the clamping finger.
2. Swivel the clamping finger to the desired
groove in the guide sleeve.
The search for the groove is facilitated if a
bolt is pushed into the threaded hole in
the guide bolt at the same time. Please
refer to the following table for the
necessary bolt diameter.
3. Screw the guide bolt in again completely. When doing this note the following
points:
– Check that the seal on the guide bolt is positioned correctly.
– The guide bolt must be locked with Loctite 24333.
– Observe the tightening torque as specified in the following table:
CLR-... 12 16 20 25 32 40 50 63
Bolt diameter [mm] 2.5 2.9 5.9 5.9 5.9 6.9 7.9 8.9
Thread M4 M4 M8 M8 M10 M10 M12x1 M12x1
Width across flats
(A/F) (guide bolt)
3 3 5 5 6 6 8 8
Tightening torque [Nm]
(+20 %)
2.5 2.5 6 6 20 20 40 40
Bild 12
Bild 11

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Fitting the CLR-...
SPlace the CLR-... so that no objects project into the swivel range of the
clamping finger.
SSelect one of the fastening possibilities listed in the following table.
Double screw connector with foot
fastening type HNA-... in the threaded
holes of the cover screws
With four screws in the threaded
holes of the cover screws:
–with flange mounting type FNC-...
–direct fastening
Bild 13
The different product sizes have connector threads of the following design and
with the following tightening torques:
CLR-... 12 16 20 25 32 40 50 63
Connecting thread M4 M4 M5 M5 M6 M6 M8 M8
Tightening torque [Nm] 3 3 5 5 8 8 23 23
Bild 14
STighten the screws evenly.

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Pneumatic installation
Please note
The clamping finger from Festo matches optimally the CLR-... and does not
require any air restriction.
SNote that if user-made clamping fingers are used, the mass moment of inertia
must be calculated.
A higher mass moment of inertia than that specified for the clamping finger
set from Festo requires a reduction in the stroke time of the CLR-... by the use
of one-way flow control valves.
The dimensions of the cone and the diagrams for determining the stroke time
as a factor of the mass moment of inertia can be found in the Festo cata
logue.
SRemove the adhesive labels on the compressed air connections.
SCheck to see if accessories are required as shown in the following table.
Type Designation Function
HGL-... Non-return valves with
closed-loop control
If there is a pressure falure, the pressure in
the piston chamber will be retained.
GRLA-... /
GRLZ-...
One-way flow control val
ves
The piston speed can be modified.
VZS-... Compressed air reservoir Fluctuations in pressure will be reduced in
the downstream-switched compressed air
string.
Bild 15
SUse short tubing lines for your
application.
Short lines optimize the pressurisation
time.
SScrew the one-way flow control valves of
type GRLZ-... or GRLA-... into the com
pressed air connections.
SConnect the tubing of the CLR-... to the
compressed air connections.
CLR-... 12 16 20 25 32 40 50 63
Connecting thread M5 G1/8
Tightening torque 1.5 Nm 6.0 Nm
Bild 16

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Bild 17
Electrical installation
SAvoid external influence caused by magnetic or ferritic parts in the vicinity of
the proximity switches.
This ensures the proper functioning of the proximity sensors.
SPush the proximity switches into groove 4.
7 Commissioning
Warning
Uncontrolled moving masses can cause injury to people or damage to objects in
the area of movement (squashed fingers, eye injuries).
SMake sure that nobody can place his/her hand in the operating range of the
clamping finger and that there are no objects in this range, in order to avoid
the risk of injury to human beings and damage to property (e.g. by providing
a protective screen).
Please note
Transverse loadings during the swivel movement can damage the bearings.
SMake sure that the clamping finger clamps only level and resting parts in its
end position.

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The clamping procedures listed in the following table are not permitted:
Clamping moving parts Clamping within the
swivel procedure
Clamping on a sloping
surface
Bild 18
SMake sure that the maximum permitted loadings are not exceeded.
If set correctly, the clamping finger must reach the end position safely without
knocking hard against it.
Commissioning – setting the clamping screw
SAdjust the clamping screw on the clamping finger. When doing this note the
following points:
Relevant points Explanation
Always counter hold on the clamping
finger (e.g. with a spanner wrench at
spanner flat 6).
At no time may there be a torque on the
guide sleeve (a spanner sliding from the
spanner flat can, under circumstances,
damage the internal guide contour of the
guide sleeve).
Adjustments may only be undertaken
when the device is at a stand.

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Relevant points Explanation
The permitted clamping range Xis
maintained. This includes a safety
distance from the swivel movement and
from the end of the stroke. The safety
distance is in each case approx. 2 mm
Key to the following diagram:
a) end of swivel movement
b) start of reliable clamping
b) end of reliable clamping
d) end position (no clamping)
(b)
(a)
(c)
(d)
The maximum screw-out length is flush
with the clamping finger.
The lock nut of the clamping screw must
be locked with Loctite 24333.
The tightening torque of the locking nut is
maintained (see following table).
Bild 19
CLR-... 12 16 20 25 32 40 50 63
Connecting thread M4 M6 M8 M10
Tightening torque [Nm] 3 12 24 47
Bild 20
Commissioning – test run
SStart a test run as follows:
– at first with slow positioning movements
– then under conditions of use.
SDuring the test run check that the CLR-... clamps reliably.
If the test run is without faults:
SEnd the test run.

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8 Operation
Warning
Uncontrolled moving masses can cause injury to people or damage to objects in
the area of movement (squashed fingers, eye injuries).
SMake sure that nobody can place his/her hand in the positioning range of the
moveable mass (e.g. by means of a protective screen). It must not be
possible to touch the CLR-... until the mass has come to a complete stand.
SMake sure that the swivel frequencies in continuous operation do not exceed
the specified values (see chapter “Technical specifications”).
9 Care and maintenance
Cleaning:
SIf necessary, clean the exterior of the CLR-... with a soft cloth.
The following cleaning agents are permitted:
– soap suds (max. +60 °C)
– petroleum ether
– any non-abrasive media.
10 Dismantling and repairs
For all dismantling and repair work:
SExhaust the CLR-...
Removing the clamping finger
1. Fix the piston rod at spanner flat 6with a
spanner wrench (note the maximum per
mitted torque on the guide sleeve, see
chapter “Mechanical installation”).
2. Unscrew the fastening screw one turn out
of the clamping finger.
3. Turn the clamping finger with a spanner
wrench. The clamping finger will then be
released from the piston rod.
Bild 21
Bild 22

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For counter holding, the maximum per
mitted torque on the guide sleeve must
not be exceeded (see chapter “Mechanical
installation”).
A suitable pull-off device must be used if
the clamping finger sticks.
SOrder the wearing parts as specified.
SAlways send the defective product to Festo.
SMake sure that the CLR-... is overhauled only by our repair service.
The repair process calls for delicate setting work.
Please describe the fault and the operating conditions in your correspondence.
11 Accessories
Designation Type
Foot mounting HNA-...
Flange mounting FNC-...
Start-up valve HEL-.../HEM-...
One-way flow control valve GRLA-...
Non-return valve HGL-...
Compressed air reservoir VZS-...
Proximity switch SME-8-.../SMT-8-...
Clamping finger CLR-...FS
Bild 23

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12 Trouble-shooting
Fault Cause Possibilities
Swivel and clamping
sequence not expected
Guide bolt in wrong groove Modification to the swivel
movement see chapter
“Mechanical installation”
Proximity switch does
not switch
Ferritic objects in vicinity
(fastening elements)
Use non-ferritic materials or a
different type of proximity
switch (SMT-8-...)
Hard impact at the end
positions
Mass on clamping finger
too large / non-permitted
parts used
Use clamping finger with
unmodified clamping screw
Excessive speed Restrict swivel motion more
CLR-... cannot hold the
part to be clamped
Insufficient operating
pressure
Increase operating pressure
to maximum permitted value
Bild 24

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13 Technical specifications
CLR-... 12 16 20 25 32 40 50 63
Design Double-acting pneumatic cylinder with swivel
mechanism
Mounting position As desired
Medium Filtered compressed air, lubricated or non-lubricated
(filter fineness 40 μm)
Operating pressure range 2 ... max. 10 bar
Connecting thread M5 G 1/8
Temperature range -10 ... +80 °C (ambient)
-10 ... +50 °C (storage)
Theoretical tension force [N]
Effective tension force [N]
(at 6 bar returning)
51
34
90
53
121
109
227
188
362
313
633
536
990
716
1682
1386
Possible swivel direction L/R L/R/G
(L = left, R = right, G = straight)
Max. perm. work frequency
(at room temperature)
– Linear-swivel movement: 0.8 Hz
– Linear movement: 1 Hz
Max. swivel angle tolerance 90° ±4° 90° ±3° 90° ±2°
Stroke tolerance 0 mm /+2.5 mm
Materials Housing: Al
Piston rod: St (coated with CLR-...-K11-R8)
Collar screws, guide pin: St
Bearings: CuSn
Seals: NBR, TPR
Wiper (with CLR-...-K11-R8): PPS
Weight without clamping
finger [kg] (approx.)
– at 10 mm stroke
– at 20 mm stroke
0.14
0.16
0.16
0.19
0.34
0.39
0.40
0.46
0.69
0.77
0.88
0.99
1.7
2.1
2.1
2.7
Bild 25

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tion of its contents to others without express authorization is
prohibited. Offenders will be liable for damages. All rights re
served in the event that a patent, utility model or design patent is
registered.
Copyright:
Festo AG & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany
Phone:
[phone]
Fax:
[phone]
E-mail:
[e-mail]
Internet:
www.festo.com