Worm Gearbox

Wormwheel gearboxes, or worm gearboxes, feature a gear arrangement in which a worm (i.e., a gear in the form of a screw) meshes with a worm gear (similar to a spur gear). Wormwheel gearboxes produce an output that is 90° from the input. A worm gearbox can be used to transmit higher torque or reduce rotational speed.

Most often, a worm gearbox has right hand threads; to change the direction of the output, a left hand thread worm gearbox is required. Worm gearboxes are referred to as 90 degree gearboxes and worm gear reducers.

Ondrives.US designs and manufactures precision right angle worm gearbox systems in ten frames sizes in shaft to bore, hollow bore flange mount, NEMA flange, high ratio, compact, and miniature configurations. Custom worm gearbox systems are also available—contact our application engineers to discuss your custom requirements.

Output torques as high as 420Nm are available. Most of our worm gear reducers are built with ≤30 arc minutes backlash, and can be supplied with as low as ≤4 arc minutes backlash. NOTE: Worm gearboxes should not be used as speed increasers.

Request Your Quote for a Custom or Modified Standard

Order today or request a quote on the worm gearbox  you need. Contact Ondrives.US to learn more.


See individual product listings for additional information and specifications. 


Shaft to Bore Flange NEMA Flange Miniature

Shaft to Bore Gearboxes

Flange Gearboxes

NEMA Flange Gearboxes

Miniature Gearboxes

High Ratio Compact Shafts for Cross Axis  

High Ratio Gearboxes

Compact Gearboxes

Gearbox shafts


If you’re not sure which worm gear reducer is best suited to your application, view our Buyer’s Guide to see ten important points to consider when choosing a gearbox. Another valuable reference, Inertia and the Use of Inertia Figures offers a formula for dealing with inertia in gearbox selection.

Worm Gearbox Input & Output Shafts

Input shafts and output shafts with drive keys and retainer rings can be supplied to your specifications for any of our hollow bore gearboxes. We carry P Series gearbox output shafts designed specifically for wormwheel gear reducers. Click here for more information.

We offer a broad selection of misalignment shaft couplings in inch and metric bore sizes for your worm gearbox application.

Other inch and metric precision ground shafts are available from stock.

The Ondrives.US Advantage

  • High efficiency right angle worm gear reducers
  • Backlash: 4, 8, or 30 arc-min
  • Single shaft, double shaft, or flange mount input
  • NEMA mount flanges available
  • Rugged worm gear reducers built for reliability in challenging applications
  • Permanently lubricated
  • 30-plus years’ experience in manufacturing gearboxes
  • Gearboxes are conservatively rated
  • Available with ingress protection to IP65 or higher
  • Solid aluminum housings
  • Ball bearings on input and output
  • Custom 90 degree gearboxes are available to your specifications

Contact Ondrives.US for Precision Worm Gearboxes

We provide reliable, high performance worm gearboxes for all motion transfer applications. Order today, request a quote, or contact Ondrives.US for the worm gear reducer you need.