Explosion-Proof Helical Gear Units Helical Gear Unit

SEW Eurodrive


Explosion Proof Gear Units


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A total of six single-stage and 14 two and three-stage sizes cover a performance range of 50 Nm to 18,000 Nm. This gear unit series is also far ahead in terms of gear unit ratios: from i = 1.30 to i = 289.74, in double gear units even i = 27,001. Torque ratings and gear unit ratios this finely stepped are hard to find on the market.


The R gear units also meet demands for high output speeds and light weight, of course. With a consistently high level of efficiency, explosion-proof helical gear units offer an optimum ratio between torque output and installation space.


RX / R / RM series explosion-proof helical gear units


  • 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, category 2, variant II2GD
    • For use on the European market
    • Accepted in China
    • Accepted in Russia in combination with EAC certificates (formerly 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
  • All screws are secured against automatic loosening
  • Gear unit has a separate nameplate
  • High-quality oil seals
  • Lubricant can withstand high temperatures
  • Single or multi-stage
  • Foot- or flange-mounted
  • Foot- and flange-mounted
  • Flange-mounted with extended bearing hub

Explosion-Proof Helical Gear Units


Choose from 21 sizes of gear units for use in potentially explosive atmospheres. The helical gear units in II2GD version are the ideal combination of performance and low space requirements.


The explosion-proof helical gear units have equipment group II approval for category 2. They drive systems and machines in potentially explosive atmospheres.

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