Page 8 of catalogue Rotary actuators of SKF Linearsysteme GmbH

Technical information

drive unit

Type

Dimensions in mm A B 120 120 120 120 125 C 76 76 76 76 44 D** E 35 35 35 35 42 100 100 100 100 100 F 50 50 50 50 50 G 38 38 38 38 38 H 8,5 8,5 8,5 8,5 8,5 K* 20 20 20 20 28 L 36 36 36 36 46 M 48 48 48 48 48 Q 30 30 30 30 37 R 6 6 6 6 12 T 22,8 22,8 22,8 22,8 31,3 U 6 6 6 6 8

Standard output shaft design
R U

CRAB 10 CRAB 11 CRAB 12 CRAB 13 CRAB 17

234 234 310 234 120

Q

D

D

K D

Solid

Solid with keyway

Hollow shaft with keyway

Other designs are available on request.

Motor

Type

“A” dimensions in mm

Type 360° 720 1 097 1 371 CRAB 20 CRAB 30 CRAB 40

Dimensions in mm B C D** E F G H 8,5 10,5 12,5 K* 35 65 80 L 46 72 92 M Q R 14 22 28 T 38,3 69,4 85,4 U 10 18 22

≤110°
CRAB 20 CRAB 30 CRAB 40 306 455 565

180° 419 626 768

270° 557 846 1 050

155 90 50 120 50 35 228 122 80 176 85 60 286 134 100 230 115 80

63 44,5 92 71 116 90

* Max. recommended bore in output shaft, tolerance class H8. Other classes are available. ** Max. recommended tolerance class h8. Other classes are available. SKF rotary actuators are also available with intermediate angular working ranges. Angular working range is given with a tolerance of ±5°.

Technical data
Actuator Max. angular working range Gear ratio Ball Acme screw screw Max. angular speed °/s 1:44 1:56 1:88 1:113 1:110 1:74 1:38 1:52 1:71 1:88 1:94 180 120 120 120 180 90 65 45 Efficiency factor1) Max. Ball Acme inst. screw screw output torque % 75 75 75 75 % 30 30 40 50 30 30 30 Nm 75 200 200 150 200 400 1 000 1 700 Max.2) axial load N 5 000 5 000 5 000 5 000 5 000 10 000 15 000 20 000 Max.3) tilting torque Nm 160 160 160 160 100 1 120 3 465 6 240 Backlash4) Ball Acme screw screw Start5) Temp.6) torque range Weight

°
CRAB 10 CRAB 11 CRAB 12 CRAB 13 CRAB 17 CRAB 20 CRAB 30 CRAB 40
1) 2) 3)

°
±0,05 0,0 0,0 0,0

° ±0,35 ±0,30 ±0,35 ±0,25 ±0,20 ±0,15 ±0,10

Nm ≈0,3 ≈0,3 ≈0,3 ≈0,3 ≈0,3 ≈0,5 ≈1,0 ≈2,0

°C
-20 to +60 -20 to +60 -20 to +60 -20 to +60 -20 to +60 -20 to +60 -20 to +60 -20 to +60

kg 5 7 7 6 3 9 25 42

135 135 125 ∞ ∞ 360 360 360

Axial load will decrease torque efficiency factor Axial load reduces the output torque Valid when shaft speed is <18°/s 4) Measured on the output shaft 5) Value by experience. If lower value is needed, contact SKF 6) If different temperature range is needed, contact SKF

Contact SKF if higher speed, load or torque is required. SKF rotary actuators designed with acme screw are self-locking

8

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