SKF CAT Series User manual

Linear actuator
CAT 33, 33H and 32B
Installation instructions
WARNING
Read all of the installation instructions
and safety precautions in this manual
before attempting to install the actuator.

Contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Important safety information 
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Intended use 
2.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Duty Factors 4
2.1.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DCVersions 4
2.1.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ACVersions 5
2.2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Requirements for correct installation 6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Available versions 
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Optional equipment 
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Technical data 
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation 
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wiring Diagrams 
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Encoder E 
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maintenance 
22

1 Important safety information
The actuator is assembled and delivered by SKF in accordance with
the customer’s requirements. No one is allowed to modify the
actuator in any way. Any modification which you have made or may
make in the future will void warranty. SKF disclaims any and all
liability or responsibility for the modified product and for any claims,
demands or causes of action for damage or for personal injury
resulting from modification and/or use of such product.
In addition, if the actuator has been disassembled, misused, or
altered without prior written authorisation, warranty will be void.
These installation instructions are part of the actuator and should
be kept together with all relevant documentation regarding the app-
lication in which it is used.
The following are important safety precautions that must be
followed during installation:
• All electrical installation and maintenance should be carried out by
qualified personnel.
• Terminate power supply to the actuator before installation or
maintenance.
• Make sure that the actuator is not under load or in tension before
installation or maintenance.
• Use the appropriate safety equipment when installing/repairing
the actuator.
• When connecting the actuator, make sure that the power supply
corresponds to what is required in the technical specifications. See
section 5.
• When heavy load and high duty factor is used, motor and sur-
rounding components can get hot.
2 Intended use
The actuator is designed to be used in the following situations:
• Axial loads.
• Indoor applications.
• Ambient temperature range of –20 to +50 °C (–5 to +120 °F).
• Intermittent use.
Actuators in the following motor ranges may only be used in an
industrial environment.
• D12xxx
• D24xxx
These actuators are compliant with the emission requirements of the
EMC Generic standards EN 61000-6-4, Emission for industrial envi-
ronments. The user maybe required to take adequate measures with
respect to emissions, if the product is operated in residential, com-
mercial and light-industrial environments according to EMC Generic
standards EN-61000-6-3.
3
3

. Duty Factors
Permitted load is related to the duty factor i.e. load must be reduced
when the duty factor is increased.
In the diagrams maximum load is shown as a function of duty
cycle. The diagrams show required capacitor size at various load and
duty factor.
If the recommended duty factor is exceeded the actuator may be
overheated and damaged.
Duty factor is defined as amount of time running under load vs.
total cycle time.
N
Duty factor % = ———— × 100
N + R
N = running under load
R = rest period
N+R = total cycle time
Permitted load for DC actuators at a specific duty factor is
expressed in percentage of maximum dynamic load capacity, see
diagram.
.. DC version
N
N+R
R
Actuator Duty factor at max dynamic load and at 20 °C (68°F)
CAT  15%
CAT B 20%
CAT H 20%
44

800
500
300
0
1 2 4
0 10 20 30 40 50 60 70 80 90 100
1 600
1 050
500
2 400
1 600
800
1 000
650
350
0
1 2 4
0 10 20 30 40 50 60 70 80 90 100
2 000
1 500
650
3 000
2 000
1 000
1 500
900
500
0
1 2 4
0 10 20 30 40 50 60 70 80 90 100
2 500
1 500
900
3 500
2 500
1 500
500
0
1 2 4
0 10 20 30 40 50 60 70 80 90 100
9001 200 500
350
250
0
1 2 4
0 10 20 30 40 50 60 70 80 90 100
900
500
300
1 200
600
500
F[N] Gear
Duty factor [%]
25 µF (E110)
16 µF (E110)
12 µF (E110)
CAT ,  V AC CAT ,  V AC
F[N] Gear
Duty factor [%]
6 µF (E220)
4 µF (E220)
3 µF (E220)
F[N] Gear
CAT B, / V AC
6 µ (E220)/25 F (E110)
4 µ (E220)/16 F (E110)
3 µ (E220)/12 µ (E110)
Duty factor [%]
F[N] Gear
CAT H,  V AC
25 µF (E110)
Duty factor [%]
F[N] Gear
CAT H,  V AC
Duty factor [%]
6 µF (E220)
4 µF (E220)
3 µF (E220)
.. AC version
55
A

. Requirements for correct installation:
• Maximum angle between the actuator’s attachment and the rear
mounting attachment must not exceed 30°. See † fig. .
•
The surface to which the actuator is attached must be able to with-
stand the force applied by the actuator.
• Ensure that the applied force on the attachments is always
centered on the actuator. See† fig. .
• If the actuator is ordered without a motor, to avoid damage to the
actuator, make sure that maximum dynamic torque applied on the
worm screw (supplied with actuator) does not exceed 0,3 Nm.
3 Available versions
CAT 32B, 33 and 33H are available in the following versions:
• 12/24 V DC
• 120/230/400 V AC
• Five types of front attachments and four types of rear
attachments.
• Encoder for digital feedback signal.
4 Optional equipment
• Control unit
• Limit switches
• Encoder E2 (see section 8)
More information is available on skf.com
5 Technical data
All values for standard actuators are tested under the following
conditions:
• Temperature + 20 °C (68 °F)
• Stabilized voltage
• Compression load
Fig. 
WARNING
Do not exceed the actuator’s load limits.
Doing so can result in serious injury
and/or property damage. For technical
data on load limits, see section 5 below.
a
a
F
F F
Fig. 
CAUTION
Avoid running the actuator into the
mechanical end position. Repeatedly
running into the mechanical end posi-
tion may damage the actuator or
shorten its lifespan.
Angle a = max 30°
66

Technical data CAT , AC
Unit CAT 33
Rated push load N800 to 3 000
Rated pull load N800 to 3 000
Speed (at full load) mm/s 5 to 241)
Stroke mm 100 to 400
Retracted length mm S+150/158/1892)
Voltage V AC 120, 230. 400
Power consumption 120 V AC W98 (brake 133,2 W)
230 V AC W92 (brake 117,3 W)
400 V AC W 80
Current consumption 120 V AC A0,82 (brake +0,29 A)
230 V AC A0,4 (brake +0,11 A)
400 V AC A 0,2
Duty cycle % 30
Ambient temperature °C –20 to +50
Type of protection IP 20/54/55
Weight kg 2 to 2,7
1) Depending on selected motor.
2) Dimension depends on selected front attachment.
Technical data CAT , DC
Unit CAT 33
Rated push load N800 to 3 000
Rated pull load N800 to 3 000
Speed (at full load) mm/s 5 to 521)
Stroke mm 100 to 400
Retracted length mm S+150/158/1892)
Voltage V DC 12 or 24
Power consumption WN/A
Current consumption 12 V DC A 18
24 V DC A 9
24 V DC A5 (for motors C24CW
and D24CW)
Duty cycle % 15
Ambient temperature °C –20 to +50
Type of protection IP 20/44/65
Weight kg 2 to 2,7
1) Depending on selected motor.
2) Dimension depends on selected front attachment.
Technical data CAT B, AC
Unit CAT 32B
Rated push load N1 500 to 3 500
Rated pull load N1 500 to 3 500
Speed (at full load) mm/s 6,5 to 321)
Stroke mm 50 to 700
Retracted length mm S+167/175/2062)
Voltage V AC 120, 230. 400
Power consumption 120 V AC W98 (brake 133,2 W)
230 V AC W92 (brake 117,3 W)
400 V AC W 80
Current consumption 120 V AC A0,82 (brake +0,29 A)
230 V AC A0,4 (brake +0,11 A)
400 V AC A 0,2
Duty cycle % 30
Ambient temperature °C –20 to +50
Type of protection IP 20/54/55
Weight kg 2 to 3,5
1) Depending on selected motor.
2) Dimension depends on selected front attachment.
Technical data CAT B, DC
Unit CAT 32B
Rated push load N1 000 to 4 000
Rated pull load N1 000 to 4 000
Speed (at full load) mm/s 5 to 521)
Stroke mm 50 to 700
Retracted length mm S+167/175/2062)
Voltage V DC 12 or 24
Power consumption WN/A
Current consumption 12 V DC A 18
24 V DC A 9
24 V DC A5 (for motors C24CW
and D24CW)
Duty cycle % 20
Ambient temperature °C –20 to +50
Type of protection IP 20/44/65
Weight kg 2 to 3,5
Technical data CAT H, AC
Unit CAT 33H
Rated push load N500 to 1 200
Rated pull load N500 to 1 200
Speed (at full load) mm/s 20 to 901)
Stroke mm 100 to 400
Retracted length mm S+150/158/1892)
Voltage V AC 120, 230. 400
Power consumption 120 V AC W98 (brake 133,2 W)
230 V AC W92 (brake 117,3 W)
400 V AC W 80
Current consumption 120 V AC A0,82 (brake +0,29 A)
230 V AC A0,4 (brake +0,11 A)
400 V AC A 0,2
Duty cycle % 30
Ambient temperature °C –20 to +50
Type of protection IP 20/54/55
Weight kg 2 to 2,7
Technical data CAT H, DC
Unit CAT 33H
Rated push load N400 to 1 200
Rated pull load N400 to 1 200
Speed (at full load) mm/s 17 to 1931)
Stroke mm 100 to 400
Retracted length mm S+150/158/1892)
Voltage V DC 12 or 24
Power consumption WN/A
Current consumption 12 V DC A 18
24 V DC A 9
24 V DC A5 (for motors C24CW
and D24CW)
Duty cycle % 20
Ambient temperature °C –20 to +50
Type of protection IP 20/44/65
Weight kg 2 to 2,7
1) Depending on selected motor.
2) Dimension depends on selected front attachment.
1) Depending on selected motor.
2) Dimension depends on selected front attachment.
1) Depending on selected motor.
2) Dimension depends on selected front attachment.
77

6 Installation
Only qualified personnel are allowed to install this equipment.
Contact SKF for further information. WARNING
Do not exceed the actuator’s load limits.
Doing so can result in serious injury and/
or property damage. For technical data
on load limits, see section 5, page 5.
Description of the mechanical installation procedure.
 Screw counter nut () onto the actuator front attachment ()
 Screw the front attachment (, ) onto the actuator’s front
attachment (), making sure that the engaged thread length is, at
a minimum, the diameter of the thread which is 12mm.
 Tighten the counter nut () onto the front attachment () with 20
Nm.
Actuator assembly
2
1
3
6
7
4
5
8
 Disassemble pin () from front attachment ().
 Install the actuator onto the front and rear attachments. Mount
the pin () onto the front attachment (). Mount rod () with
safety pins () onto the rear attachments () and ().
8
8

Overview of front and rear attachment options
 Front attachment (accessories) 576-32
 Safety pin (part of 576-32)
 Nut M12
 Front attachment (accessories) 575-32
 Actuator front attachment option G3
 Actuator front attachment option G5
2
1
3
11
12
5
9
13
4
14
10
8
7
6
 Actuator front attachment option G4
 Actuator front attachment option G1/G2
 Actuator rear attachment A1/A2
 Actuator rear attachment K1/K2
 Mounting rod (supplied with rear attachment A1/A2)
 Safety pin (supplied with rear attachment A1/A2)
 Attachment rear (accessories) 580-32
 Attachment rear (accessories) 582-32
9
9
B

7 Wiring Diagrams
WARNING
• All electrical installation/maintenance
should be carried out by qualified
personnel.
• Isolate the power before installation
or maintenance. Use the appropriate
safety equipment when installing/
repairing the actuators.
• When connecting this equipment to
the electrical supply, make sure that it
corresponds to the one described in
the technical specifications.
• For complete installation instructions
regarding SKF limit switch, see sepa-
rate installation instructions.
Connecting diagram - DC version
+
2
13 2
13
M
12/24 V DC
21
Connecting diagram - AC version
L1
N
PE
2
1
CW 0
120/230 V AC
Q1 Q2
Q2 Q1
M
Q1
Q2
W1 V1 U1
L1
L2
L3
N
PE
400 V AC
+140 °C
CCW
3¿
Black
Blue White
Brown Red
Red
Black Black
L1
N
PE
2
1
CW 0
120/230 V AC
Q1 Q2
Q2 Q1
M
Q1
Q2
W1 V1 U1
L1
L2
L3
N
PE
400 V AC
+140 °C
CCW
3¿
Limit switch Limit switch
Limit switch Limit switch
1010

8 Encoder E2
Two-channel quadrature encoder for CATR/L
32 and 33
• The encoder is available for all motor types and screw pitches in
the CAT-modular range
• The encoder consists of two parts; one rotating magnet on the
motor drive shaft, and one circuit board (PCB) assembled on the
motor’s opposite side.
• The rotating permanent magnet has four poles (2N and 2S) and
during one motor revolution, two pulses are generated in each
channel.
• The output signals, channel 1 and 2, are phase-shifted ±90°
• Supply voltage range is from 5 to 24 V DC
• Temperature range is from –20 to +50 °C
Technical information
Channel 1 (reference)
Channel 2 moving direction
Outwards CATR
Inwards CATL
Channel 2 moving direction
Inwards CATR
Outwards CATL
() Output signals when the actuator is moving either outwards or
inwards.
0° 360° 720°
90°
90°
U
U
U
1 rev. for the magnet
1111
B

Movement resolution
Actuator Gear option Pulse at 1 mm stroke Resolution per pulse [mm]
CAT  1 16,67 0,06
CAT  2 8,33 0,12
CAT  4 4,17 0,24
CAT H 1 4,00 0,25
CAT H 2 2,00 0,50
CAT H 4 1,00 1,00
CAT B 1 12,50 0,08
CAT B 2 6,25 0,16
CAT B 4 3,13 0,32
Recommended operating ratings
Parameter Value
Temperature range –20 to +50 °C
Supply voltage range +5 to +24 V DC ±5%
Current sink capability Max 20 mA
Wire color coding (colors according to DIN )
Wire color Function
Brown Supply voltage GND (-)
White Supply voltage POS (+)
Green (L)1) alt. Yellow (R)1) Output signal channel 1
Yellow (R)1) alt. Green (L)1) Output signal channel 2
1) The alternatives in wire color for output signals channel 1 and 2 mean that the actuator has
been assembled as CATR (right) or CATL (left). The wire is delivered with stripped ends (no
connector).
Encodet output circuitry – open drain with pull-up
+V
Encoder
Supply
POS
Output signal
Ch X
Supply
GND
GND
1,8 k Ω
1212

9 Maintenance
Keep this information for future reference. Please contact your local
SKF sales office if you need more information or spare parts.
Please check www.skf.com for relevant addresses.
Interval Maintenance work
Daily • Check actuator for visible damage
• Clean off dust and dirt if necessary
Monthly • Check attachments and tighten if necessary.
• Check that cables are not damaged, replace if necessary.
• Check optional equipment for visible damage, replace if necessary.
• Functional check of operation
Every 6 months • A few drops of oil should be applied to the adjustment tube
Annually • Check labels
• Check electrical connections
1313
B

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PUB MT/I  EN · October 2017
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