Shaft to Bore & Shaft to Shaft Speed Reducers

Ondrives.US is an industry leading designer and manufacturer of worm and wheel gearboxes. Our worm gear reducers deliver exceptional performance and reliability in a wide range of applications.

P and PA series Shaft to Bore worm gearboxes are engineered for ≤30 Arc Minutes of Backlash or better, they are an effective power transfer solution, designed for various shaft input sizes and torque ratings. They are available in inch or metric bore and shaft sizes.

OFG series Shaft to Bore gearboxes are oil filled and sealed for life. Ratios are available from 5:1 up to 120:1

K40H series and K50H series Shaft to Bore reducers have rugged glass filled polyester housings making them economical and lighter weight.

BP series, K40S series and K50S series worm gear reducers are Shaft to Shaft gearboxes

Order the Ondrives.US Shaft to Bore & Shaft to Shaft gearboxes for your project requires, request a quote, or contact us for more information.

Precision Worm Wheel Gear Reducers

Ondrives.US offers worm and wheel gear reducers in a variety of ratios and configurations to meet your unique requirements. These compact worm gear reduction boxes are manufactured from top quality materials and engineered for high performance in demanding applications.

For full specifications and Dimensional Parametric Search, see individual product listings. 


P and PA Speed Reducers

  • High-efficiency gear reducers (as high as 90% at 1,000 RPM)
  • Standard ratios from 5:1 to 120:1
  • Standard backlash is ≤30 arc minutes
  • Backlash as low as ≤4 arc minutes is available
  • Single- or double-ended output shafts - purchase separately
  • Durable construction and components
  • Solid aluminum housings
  • Greased for life
  • Ball bearings on input and output
  • Custom gear reductions available

P80 Worm Wheel Drives

  • Precision crossed roller output; tapered roller input
  • Right angle shaft output
  • Solid aluminum casing, aluminum bronze wheel, HRC-50 induction-hardened steel worm teeth
  • Low backlash (≈6 arc minutes)
  • Ratios 25:1, 50:1 and 100:1
  • Grease-filled gearbox for minimal maintenance

OFG40 Worm Wheel Drives

  • Oil filled

K40H and K50H series Worm & Wheel Gearboxes

  • Glass filled polyester housing
  • Light weight
  • Economical
  • Shaft to Shaft or Shaft to Bore available

BP series Shaft to Shaft

  • Right angle shaft output
  • Solid aluminum casing, aluminum bronze wheel, HRC-50 induction-hardened steel worm teeth Grease-filled gearbox for minimal maintenance
  • Ratios available 9.67:1 to 60:1

Order our worm gear reduction boxes or worm wheel drives you need, request a quote, or contact us for more information.