S..CMP.. Helical Worm Servo Gearmotor

SEW Eurodrive


Explosion Proof Gearmotors


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Explosion-proof helical-worm gear units


S series: two stages


  • Gear units comply with Directive 94/9/EC (ATEX), or as of April 20, 2016 of the EU Directive 2014/34/EU (ATEX), equipment group II, equipment category 2, II2GD design
    • For use on the European market
    • Accepted in China
    • Accepted in Russia in conjunction with EAC certificates (successor to GOST-R)
  • Certified protection types:
    • Protection type “c”: Protected by safe construction (design safety), EN13463-1 and -5
    • Protection type “k”: Protected by liquid immersion, EN13463-1 and -8
  • Standardized robust covers as shrink disk covers on the gear unit
  • All screws are secured against automatic loosening
  • Gear unit has a separate nameplate
  • High-quality oil seals
  • Lubricant can withstand high temperatures
  • Significantly more efficient than pure worm gear units due to helical-worm combinations
  • Very low-noise operation
  • Available versions:
    • Foot-mounted or flange-mounted
    • B5 or B14 flange-mounted
    • Solid or hollow shaft
    • Hollow shaft with keyed connection, shrink disk, splined hollow shaft, or TorqLOC®


Explosion-proof synchronous servomotors


CMP.. series


  • Compliant with Directive 94/9/EC (ATEX), or as of April 20, 2016 of the EU Directive 2014/34/EU (ATEX), equipment group II, equipment category 3
    • Category II 3GD, for use in zones 2 / 22
    • Category II 3D, for use in zone 22
    • Also available with brake and Hiperface® encoder (with electronic nameplate) in category 3D

Explosion-proof helical-worm servo gearmotors


Multi-function drives with design-related benefits: The explosion-proof helical-worm servo gearmotors have exceptional power delivery and precise scalability, and are fully certified according to ATEX.


Explosion-proof versions: Dynamic helical-worm servo gearmotors


The explosion-proof version of the S..CMP.. helical-worm servo gearmotors offers maximum safety. It is designed for operation in systems subject to explosion risk and meets all ATEX requirements for equipment group II in category 3.


This enables you to enjoy all the benefits of the S..CMP.. helical-worm servo gearmotors while ensuring maximum safety at the same time. You can count on the explosion-proof helical-worm servo gearmotors to deliver dynamics, running smoothness, and precision. This particularly applies to any of your systems that are based on efficiently linking precise individual steps to build complex processes.


As they are angular drives, they are compact and save installation space. The explosion-proof S..CMP.. gearmotors are designed in such a way that they guarantee a low-noise system environment. Moreover, these drives offer excellent damping properties, so your systems operate with low levels of vibration. This is due to the linear application of force on the input shaft, which efficiently prevents torque impulses and enables high levels of running smoothness and noise reduction.


Certification according to ATEX includes equipment group II and equipment category 3. The combinations are available in II3GD and II3D design.

Please feel free to contact us – We are ready to help with any application. Call us at (208) 322-2425