15 different ratios ranging from 3.5:1 to 100:1
Max. input speed: 1800 RPM
Result 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 result shafts with drive keys and retainer rings can be supplied to your specs for just about any of our hollow bore gearboxes. We bring P Series gearbox output shafts designed specifically for our worm equipment reduction boxes.

Our inventory also contains a broad selection of misalignment shaft couplings in in . and metric bore sizes for your worm gearbox program. Other in . and metric precision surface shafts are available from stock.

The Ever-Power Advantage 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 consist of:
High efficiency correct angle worm gear reducers
Backlash: 4, 8, or 30 arc-min
Single shaft, dual shaft, or flange install input
NEMA mount flanges available
Rugged worm gear small worm gearbox Reducers built for reliability in challenging applications
Permanently lubricated
Gearboxes are conservatively rated
Available with ingress protection to IP65 or higher
Solid aluminum housings
Ball bearings on input and output
Custom 90-level gearboxes can be found to your specifications
Ask for a Quote for Precision Worm Gearboxes
We provide reliable, powerful worm gearboxes for all motion transfer applications. Order today, demand a quote, or contact Ever-Power for the worm gear reducer you need.

See individual item listings for more information and specifications.
Worm Drive Gearboxes for High Torque Applications
Our worm gearboxes are greased for life and feature solid aluminum housings and ball bearings on input and result. If you’re uncertain which gear reduction box is best suited to your application, watch our Buyer’s Guideline to see ten important points to consider when choosing a gearbox. Another useful reference, Inertia and the usage of Inertia Figures, offers a formula for dealing with inertia in worm gear selection.
Shaft to Bore Wormwheel Gearboxes
Shaft to bore worm gearboxes are engineered for ≤30 arc mins of backlash. Offered ratios range between 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 at least one 1,400 lbf.in.
Rated for input speeds up to 3,000 RPM
Backlash as low as 4 arc minutes
Flange Wormwheel Gearboxes
Flange gear decrease boxes have a compact footprint and generate an output at 90° from the input. Obtainable in a range of sizes with single-ended or double-ended result shafts, and with regular ratios ranging from 5:1 to 120:1. 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 speeds up to 3,000 RPM
Backlash as low as 4 arc minutes
NEMA Flange Worm Drive Gearboxes
NEMA flange worm gearboxes include a compact aluminum frame with a 90° result angle and so are offered with reduction ratios ranging from 5:1 to 120:1. Optional NEMA 17 and NEMA 23 inputs can be found, as well as single-output or double-output shafts. Imperial and metric sizes.
High efficiency: up to 90% at 1,000 RPM
Output torque up to at least one 1,400 lbf.in.
Rated for input boosts to 3,000 RPM
Backlash as low as 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. Available 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°
Output torque up to 3.95 lbf.in.
Frame 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 device. Dual ball bearings and permanent lubrication provide years of dependable high cycle performance. Pick from three frame sizes with ratios which range from 25:1 to 900:1. Metric sizes only.
Insight speeds: up to 3,000 RPM
Torque values: 2.2Nm to 34Nm
Low backlash: ≈2°
Compact Wormwheel Gearboxes
Our most compact worm drive gearbox is made to deal with demanding power transfer applications and is obtainable with a 5:1, 10:1 or 20:1 gear ratio. Features include machined aluminum housing and hardened steel 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 1 1.09 in high.
Economic Molded Glass Filled Housing Speed Reducers
Assembled in a Glass filled Nylon Housing are financial yet deliver superior overall performance.