Your benefits

  • High flexibility

    with direct motor mounting because there is no longer any need for an adapter with clamp coupling.

  • Incredible performance

    thanks to the high operating speeds and efficiency levels.

  • High reliability

    due to the wear-free gearing and consistently low rotational clearance.

  • Low-backlash planetary servo gear units
  • Designed for nominal torques from 25 Nm to 3 000 Nm
  • Available in three output variants:
    • PSF: B5 output, flange, smooth solid shaft (without key)
    • PSKF: B5 output, flange, solid shaft with key
    • PSBF: B5 output, flange block shaft according to EN ISO 94
  • Easy mounting of (third-party) motors using the EPH motor adapter
  • Life-long lubrication
  • Surface protection: OS1 to OS4
  • High permitted overhung loads

PS.F series planetary servo gear units

Type Size
Single-stage/
double-stage		 Torque class
Nm		 Overhung load range
N		 Gear ratios
i		 Rotational clearance` (single-stage/double-stage)
Standard Optional
Reduced (../R) Minimized (../M)
PS(K)F 121 / 122 25 1 900 – 2 000 Single-stage1)
32),4,5,7,10

Double-stage1)
16,20,25, 28, 35,40,49,70,100

 8′ / 10′ 4′ / 6′ 2′ / 3′
221 / 222 55 1 720 – 2 680 6′ / 8′ 3′ / 4′ 1′ / 2′
321 / 322 110 4 380 – 5 480
521 / 522 300 6 150 – 9 610
621 / 622 600 13 400 – 14 200 4′ / 6′ 2′ / 3′ 1′ / 1′
721 / 722 1000 25 700 – 35 900
821 / 822 1750 51 400 – 62 800
921 / 922 3000 55 000 – 83 300
  1. 1) Other gear ratios on request
  2. 2) Only for PS(K)F 121 / 521
Type Size
Single-stage/
double-stage		 Torque class
Nm		 Overhung load range
N		 Gear ratios
i		 Rotational clearance` (single-stage/double-stage)
Standard Optional
Reduced (../R) Minimized (../M)
PSBF 221 / 222 55 1 530 – 5 000 Single-stage
5,7,10

Double-stage
153),20, 25, 35,
49,70,100

 6′ / 8′ 3′ / 4′ 1′ / 2′
321 / 322 110 8 580 – 25 000
521 / 522 300 13 900 – 40 000
621 / 622 600 20 800 – 60 000 4′ / 6′ 2′ / 3′ 1′ / 1′
721 / 722 1 000 37 900 – 120 000
821 / 822 1 750 66 100 – 180 000
  1. 1) Other gear ratios on request
  2. 2) Only for PS(K)F 121 / 521
  3. 3) Only for PSBF 322 / 522