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Your benefits

Powerful operation
The dynamic explosion-proof helical-bevel servo gearmotors are designed for torques of up to 8000 Nm.

Achieve precision
State-of-the-art servo drive technology provides all the advantages of short response times and precise scalability.

Ensure safety
These servomotors are used in systems operated in particularly sensitive areas.

Powerful performance with our explosion-proof helical-bevel gearmotors

For drives used in areas with high gas or particle emissions, specific requirements must be met for explosion protection. Our explosion-proof K..CMP helical-bevel servo gearmotors offer a complete solution that is cost-effective and safe.

With dynamic, precise, and compact servo drive technology on the one hand and certified safety for potentially explosive system environments on the other. The explosion-proof K..CMP.. helical-bevel servo gearmotors guarantee a high degree of functionality in terms of power delivery and precision – especially when complex processes and process reliability are involved. Thanks to their precise scalability, unlimited range of variants, and wear-free design, the explosion-proof K..CMP.. helical-bevel servo gearmotors are always the unit of choice.

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

Contact form Worldwide locations Locations in Germany Worldwide directives and standards TorqLOC® hollow shaft mounting system Adapters Extended Warranty Surface and corrosion protection Lubricants DUO diagnostic unit Brakes and brake control Encoder systems /DUE diagnostic unit option Premium Sine Seal oil seal Other additional features Learn more Explosion-proof helical-bevel gear units K series: three-stage
  • 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”: Protection guaranteed by safe construction (design safety)
    • 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
  • High efficiency
  • Gearing with high fatigue strength
  • Long, maintenance-free service life
  • 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®

Sizes K..37 to K..107, explosion-proof (three stages)

  • Double gear units for very low output speeds also available
  • Reduced backlash variant
More on explosion-proof K series helical-bevel gear units
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
More on explosion-proof CMP.. series synchronous servomotors
K..CMP.. gearmotors
K.. gear unitsCMP.. motors
Gear unit sizeSizeTorque range MaDyn
3740M – 71M15 – 230
4750S – 80S29 – 435
5750S – 100S38 – 665
6750S – 100L42 – 920
7763S – 100L77 – 1550
8771S – 100L205 – 3240
9780S – 100L765 – 4710
107100S – 100L565 – 9090

Applications in potentially explosive areas with air/gas or air/dust mixtures according to Directive 94/9/EC (ATEX), or as of April 20, 2016 of the EU Directive 2014/34/EU (ATEX),

Gearmotor (directly mounted gearmotor)II3GD
Stand-alone gear units (gear units with adapter AQ)II2GD1/21
Stand-alone CMP.. motorII3GD


  • Food industry
  • Packaging machines
  • Packers/unpackers
  • Palletizers and packaging machines
  • Sorting and stacking systems
  • Conveyor belts
  • Cycle feeds
  • Tire, rubber and plastic processing machines
  • Travel axes, lifting axes, additional axes
  • Positioning drives