15 different ratios which range from 3.5:1 to 100:1
Max. input speed: 1800 RPM
Output torque up to 190 in-lbs
Light weight Nylon housing
Lubricated for life
Shaft input to shaft output or shaft insight to hollow bore output
Input & Result Shafts for Worm Gearboxes
Input shafts and output shafts with drive keys and retainer rings could be supplied to your specifications for any of our hollow bore gearboxes. We carry P Series gearbox output shafts designed specifically for our worm equipment reduction boxes.

Our inventory also includes a broad collection of misalignment shaft couplings in inch and metric bore sizes for your worm gearbox app. Other ” and metric precision ground shafts are available from stock.

The Ever-Power Benefit for Worm Drive Gearboxes
Ever-Power has 30-plus years’ experience in manufacturing gearboxes and other precision drive elements. Features and benefits of our worm gears include:
High efficiency correct 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 equipment reducers built for dependability in challenging applications
Permanently lubricated
Gearboxes are conservatively rated
Offered with ingress small worm gearbox protection to IP65 or higher
Solid aluminum housings
Ball bearings upon input and output
Custom 90-degree gearboxes can be found to your specifications
Request a Quote for Precision Worm Gearboxes
We provide reliable, powerful worm gearboxes for almost all motion transfer applications. Purchase today, ask for a quote, or get in touch with Ever-Power for the worm gear reducer you need.

See individual item listings for additional information and specifications.
Worm Drive Gearboxes for High Torque Applications
Our worm gearboxes are greased for life and feature solid aluminium housings and ball bearings on insight and result. If you’re not sure which gear reduction box is best suited to your application, watch our Buyer’s Guidebook to see ten important points to consider whenever choosing a gearbox. Another important reference, Inertia and the Use of Inertia Figures, offers a method for dealing with inertia in worm gear selection.
Shaft to Bore Wormwheel Gearboxes
Shaft to bore worm gearboxes are engineered for ≤30 arc moments of backlash. Obtainable ratios range from 5:1 to 120:1 with single-ended or double-ended result shafts. Imperial and metric sizes.
High efficiency: up to 90% at 1,000 RPM
Result torque up to 1 1,400 lbf.in.
Rated for input boosts to 3,000 RPM
Backlash only 4 arc minutes
Flange Wormwheel Gearboxes
Flange gear reduction boxes have a concise footprint and create an output at 90° from the input. Obtainable in a range of sizes with single-ended or double-ended output shafts, and with standard ratios ranging from 5:1 to 120:1. Imperial and metric sizes.
High efficiency: up to 90% at 1,000 RPM
Output torque up to 1 1,400 lbf.in.
Rated for input speeds up to 3,000 RPM
Backlash only 4 arc minutes
NEMA Flange Worm Drive Gearboxes
NEMA flange worm gearboxes feature a compact aluminum framework with a 90° result angle and so are offered with decrease ratios ranging from 5:1 to 120:1. Optional NEMA 17 and NEMA 23 inputs are available, along with single-output or double-result shafts. Imperial and metric sizes.
High efficiency: up to 90% at 1,000 RPM
Result torque up to 1 1,400 lbf.in.
Rated for input boosts to 3,000 RPM
Backlash only 4 arc minutes
Miniature Wormwheel Gearboxes
Miniature worm gear decrease boxes are greased for life and offered in metric sizes with ratios which range from 1:1 to 30:1. Obtainable in 3.00mm or 4.00mm shaft output options. Metric sizes only.
High efficiency: up to 82% at 1,000 RPM
Max. Output: up to 4,000 RPM
Low backlash: ≈2°
Result torque up to 3.95 lbf.in.
Framework sizes 14mm cubed and 20mm cubed
High Ratio Reduction Worm Gearboxes
High reduction worm gearboxes feature parallel input and output shafts and are essentially two reduction gearboxes in one unit. Dual ball bearings and permanent lubrication provide years of reliable high cycle performance. Select from three frame sizes with ratios ranging from 25:1 to 900:1. Metric sizes only.
Input speeds: up to 3,000 RPM
Torque values: 2.2Nm to 34Nm
Low backlash: ≈2°
Compact Wormwheel Gearboxes
Our most small worm drive gearbox is designed to deal with demanding power transfer applications and is obtainable with a 5:1, 10:1 or 20:1 equipment ratio. Features include machined light weight aluminum housing and hardened metal gears. Imperial sizes only.
High efficiency: up to 90% at 1,000 RPM
Max. input speed: 3,000 RPM
Low backlash: maximum ≈2°
Result torque up to 3.95 lbf.in
Lightweight – approximately 4oz
Low profile – only one 1.09 in high.
Economic Molded Glass Filled Housing Speed Reducers
Assembled in a Glass filled Nylon Housing are financial yet deliver superior efficiency.