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Your advantages

High flexibility
is offered by the servo gear unit in direct motor mounting, as the usual adapter with clamp coupling is no longer required.

Enormous performance
thanks to high operating speeds and efficiencies.

Great reliability
thanks to wear-free gearing and consistently low rotational clearance.

Explosion-protected BS.F series helical-bevel servo gear units

Explosion-protected, low-backlash servo planetary gear units: compact and reliable

Explosion protection in a compact design, plus high rotational speeds and high torques: this is what characterises our ATEX-compliant planetary servo gear units.

Our planetary gear units reliably ensure precision and efficiency in potentially explosive environments. The PS.F series offers torques from 25 Nm to 3 000 Nm.

They have consistently low rotational clearance and high torsional stiffness. All gear ratios from i = 3 to i = 100 are integer and finely stepped. This makes these explosion-protected servo gear units in equipment category II particularly suitable for use on open-loop controls where integer resolution ratios are required.

Only half the solution without a motor? Then take advantage of our sophisticated modular system and combine the explosion-protected servo gear units of the PS.F series with a motor. explosion-protected servomotor of your choice.
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  • Low-backlash ATEX-compliant servo planetary gear units
  • Designed for torque classes 25 Nm to 3,000 Nm
  • Two output variants available:
    • PSF: Output B5, flange, full wave smooth (without key)
    • PSKF: Output B5, flange, full wave with key

Explosion-protected servo planetary gear units PS.F series
type Size single-stage 2-stage size Torque class
Nm 		Gear ratio i 3)
single-stage 		Gear ratio i 3)
2-stage 		Rotational clearance `
single-stage 		Rotational clearance `
2-stage
PSF 121 122 25 3 / 4 / 5 / 7 / 10 15 / 16 / 20 / 25 / 28 / 35 / 40 / 49 / 70 / 100 8 4) / 4 5) / 2 6) 10 / 6 / 3
PSF 221
 222
 55 3 / 4 / 5 / 7 / 10
 15 / 16 / 20 / 25 / 28 / 35 / 40 / 49 / 70 / 100 6 / 3 / 1 8 / 4 / 2
PSF 321
 322
 110 3 / 4 / 5 / 7 / 10
 15 / 16 / 20 / 25 / 28 / 35 / 40 / 49 / 70 / 100 6 / 3 / 1 8 / 4 / 2
PSF 521
 522
 300 3 / 4 / 5 / 7 / 10
 15 / 16 / 20 / 25 / 28 / 35 / 40 / 49 / 70 / 100 6 / 3 / 1 8 / 4 / 2
PSF 621
 622
 600 4 / 5 / 7 / 10
 15 / 16 / 20 / 25 / 28 / 35 / 40 / 49 / 70 / 100 4 / 2 / 1 6 / 3 / 1
PSF 721
 722
 1 000 4 / 5 / 7 / 10
 15 / 16 / 20 / 25 / 28 / 35 / 40 / 49 / 70 / 100 4 / 2 / 1 6 / 3 / 1
PSF 821
 822
 1 750 4 / 5/ 7 / 10
 15 / 16 / 20 / 25 / 28 / 35 / 40 / 49 / 70 / 100 4 / 2 / 1 6 / 3 / 1
PSF 921 922 3 000 4 / 5/ 7 / 10 15 / 16 / 20 / 25 / 28 / 35 / 40 / 49 / 70 / 100 4 / 2 / 1 6 / 3 / 1

3) Other gear ratios on request

4) Standard

5) Reduced

6) Minimised
  • Potentially explosive users with air-gas or air-dust mixtures in accordance with Directive 94/9/EC (ATEX) or, from 20 April 2016, EU Directive 2014/34/EU (ATEX)
  • Applications with equipment category II2GD
  • Use with air mixtures
    • with gases (G): in zones 1 and 2
    • with dusts (D): in zones 21 and 22
  • Examples
    • Packaging machines
    • Machine tools
    • Filling and dosing equipment
    • Labelling machines
    • FFS machines
    • Cycle feeders
    • Pick & place robotics
    • Robot travelling axes
    • Flying saw
    • Processing machines
    • Handling gantries
    • Conveyor belts
    • Feed, swivelling and auxiliary axes
    • Travelling axes, additional axes
    • Woodworking centres