RA Series Helical Worm Gearbox

Its RA series of worm gearboxes have coupling between RS series gearboxes as well as the XA front stage of the series to provide higher reduction ratios than the single worm gearboxes.

Category: Tag:


Main Components

  • Input and output oil seals in NBR
  • Housing and covers in die-cast aluminum (for the pre-stage and till size 85 of the RS gearbox) and grey cast iron (sizes 110, 130, and 150 of the RS gearbox)
  • Worm wheel in bronze
  • Bearings with a ball or conical roller
  • Input flanges in die cast aluminium
  • Motor flexible coupling
  • Gears in cemented and hardened alloy steel
  • Support hub in grey cast iron
  • Synthetic oil for lifetime lubrication of the gears
  • RCA oil seal in NBR
  • Worm shaft in alloy steel


  • Low maintenance and management costs
  • Modular concept
  • An extended lifetime with excellent reliability
  • Easy installation and maintenance
  • Long life lubrication
  • Versatility of use

Special Solutions

For Application Sectors

  • Silicone, Viton, or special seals for high/low temperatures and the food & beverage sector
  • Anodization for chemical and ship-building/marine sectors
  • Special lubricants for high/low temperatures and the food & beverage sector
  • Non-standard breather plugs for high/low temperatures
  • Special paint finishes for chemical, ship-building/marine, and food & beverage sector
  • ATEX version for potentially explosive environments

For NEMA and servo motors

  • Flanges and couplings for servomotors
  • Output holes in inches
  • Input couplings for NEMA motors