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 insight to shaft output or shaft input to hollow bore output
Input & Output Shafts for Worm Gearboxes
Input shafts and result shafts with drive keys and retainer bands could be supplied to your specs for just about any of our hollow bore gearboxes. We carry P Series gearbox output shafts designed particularly for our worm gear reduction boxes.

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

The Ever-Power Advantage for Worm Drive Gearboxes
Ever-Power has 30-in addition years’ experience in production small worm gearbox gearboxes and other precision drive components. Features and benefits of our worm gears include:
High efficiency right 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 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 upon input and output
Custom 90-level gearboxes can be found to your specifications
Request a Quote for Precision Worm Gearboxes
We provide reliable, high performance worm gearboxes for almost all motion transfer applications. Order today, ask for a quote, or get in touch with Ever-Power for the worm equipment reducer you need.

See individual product listings for more information and specifications.
Worm Drive Gearboxes for High Torque Applications
Our worm gearboxes are greased for life and feature solid light weight aluminum housings and ball bearings on input and result. If you’re not sure which gear reduction container is most effective to your application, watch our Buyer’s Guide to see ten essential points to consider when choosing a gearbox. Another precious reference, Inertia and the Use of Inertia Figures, offers a formula for dealing with inertia in worm equipment selection.
Shaft to Bore Wormwheel Gearboxes
Shaft to bore worm gearboxes are engineered for ≤30 arc minutes of backlash. Available 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 speeds up to 3,000 RPM
Backlash only 4 arc minutes
Flange Wormwheel Gearboxes
Flange gear reduction boxes have a compact footprint and create an output at 90° from the input. Available in a range of sizes with single-ended or double-ended result shafts, and with regular ratios which range from 5:1 to 120:1. 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
NEMA Flange Worm Drive Gearboxes
NEMA flange worm gearboxes feature a compact aluminum body with a 90° result angle and are offered with decrease ratios which range from 5:1 to 120:1. Optional NEMA 17 and NEMA 23 inputs can be found, and also single-output or double-result shafts. 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
Miniature Wormwheel Gearboxes
Miniature worm gear reduction 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 Decrease Worm Gearboxes
High reduction worm gearboxes feature parallel insight and output shafts and are essentially two reduction gearboxes in one device. Dual ball bearings and permanent lubrication offer years of dependable high cycle performance. Pick from three frame sizes with ratios ranging from 25:1 to 900:1. Metric sizes only.
Insight speeds: up to 3,000 RPM
Torque ideals: 2.2Nm to 34Nm
Low backlash: ≈2°
Compact Wormwheel Gearboxes
Our most compact worm drive gearbox is designed to manage demanding power transfer applications and is available with a 5:1, 10:1 or 20:1 gear ratio. Features consist of machined aluminium 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°
Output torque up to 3.95 lbf.in
Lightweight – approximately 4oz
Low profile – only one 1.09 in high.
Economic Molded Glass Filled Casing Speed Reducers
Assembled in a Cup filled Nylon Housing are financial yet deliver superior overall performance.