• Detailed information about your individual product
  • CAD data and documentation for your configuration
  • Option to directly request a quotation or place an order
 Configure product now
Your benefits

Comprehensive offer
as the gear units offer finely stepped torques and gear ratios for use in potentially explosive atmospheres.

Easy combination
because you can easily combine an explosion-proof helical gear unit with an explosion-proof motor from our modular system.

Explosion-proof parallel-shaft helical gear units
The classic: Versatility and performance, even in potentially explosive atmospheres

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

A total of six single-stage and 15 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, our explosion-proof helical gear units offer an optimum ratio between torque output and installation space.

Only half the solution without a motor? Then use our sophisticated modular concept and combine the explosion-proof gear units of the R series with the explosion-proof motor of your choice.
Contact form Worldwide locations Worldwide directives and standards Surface and corrosion protection AMS.. and AQS.. adapters Extended Warranty Lubricants DUO diagnostic unit Learn more RX / R / RM series explosion-proof helical gear units
  • Highly efficient helical gear units in 6 frame sizes
  • High output speed, torque up to 830 Nm
  • Gear unit ratios up to i = 8.65
  • Available in foot or flange-mounted design
 Sizes 57 / 67 / 77 / 87 / 97 / 107
Gear unit ratio i 1.30 – 8.65
Max. output torque
Nm 69 – 830
Motor power range (Mounting via AM motor adapter) kW 0.12 – 45
  • Applications in potentially explosive atmospheres 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)
  • Applications with equipment categories II2GD
  • Use with air mixtures
    • With gases (G): in zones 1 and 2
    • With dusts (D): in zones 21 and 22
  • Examples:
    • Roller conveyors
    • Belt conveyors
    • Chain conveyors
  • Explosion-proof helical gear units with extended output bearing hub
  • Specifically designed for agitating applications
  • Ten frame sizes
 Sizes 57 / 67 / 77 / 87 / 97 / 107 / 127 / 137 / 147 / 167
Gear unit ratio i 4.29 – 289.74
Gear unit ratio – double gear units i 134 – 27,001
Max. output torque Nm 450 – 18,000
Motor power range (Mounting via AM motor adapter) kW 0.12 – 160
  • Applications in potentially explosive atmospheres 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)
  • Applications with equipment categories II2GD
  • Use with air mixtures
    • With gases (G): in zones 1 and 2
    • With dusts (D): in zones 21 and 22
  • Examples:
    • Agitators
    • Blenders
    • Mixers
    • Kneaders
  • Fifteen frame sizes allow for an optimum ratio between performance and space requirements
  • Finely stepped gear unit ratios up to i = 289.74; or i = 27,001 for double gear units
  • Available in foot or flange-mounted design
  • Also available with reduced backlash
 Sizes 07 / 17 / 27 / 37 / 47 / 57 / 67 / 77 / 87 / 97 / 107 / 127 / 137 / 147 / 167
Gear unit ratio i 3.21 – 289.74
Gear unit ratio – double gear units
 i 90 – 27 001
Max. output torque Nm 50 – 18,000*
Motor power range (Mounting via AM motor adapter) kW 0.09 – 160

* Also with reduced backlash
  • Applications in potentially explosive atmospheres 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)
  • Applications with equipment categories II2GD
  • Use with air mixtures:
    • With gases (G): in zones 1 and 2
    • With dusts (D): in zones 21 and 22
  • Examples:
    • Rotary tables
    • Pumps and fans
    • Waste water and sewage treatment plants
    • Fans
    • Roller conveyors
    • Belt conveyors
    • Chain conveyors
    • Corner transfer units