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

Our inventory also contains a broad collection of misalignment shaft couplings in ” and metric bore sizes for your worm gearbox program. Other ” and metric precision ground shafts can be found from stock.

The Ever-Power Benefit for Worm Drive Gearboxes
Ever-Power has 30-in addition years’ experience in manufacturing gearboxes and other precision drive components. Features and benefits of our worm gears consist of:
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 dependability 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-degree gearboxes can be found to your specifications
Demand a Quote for Precision Worm Gearboxes
We provide reliable, high performance worm gearboxes for almost all motion transfer applications. Purchase today, ask for a quote, or contact Ever-Power for the worm equipment reducer you need.

See individual product listings for additional information and specifications.
Worm Drive Gearboxes for High Torque Applications
Our worm gearboxes are greased forever and feature solid light weight aluminum housings and ball bearings on input and output. If you’re uncertain which gear reduction box is best suited to your application, watch our Buyer’s Guideline to see ten essential points to consider when choosing a gearbox. Another beneficial reference, Inertia and the Use of Inertia Statistics, offers a formulation for coping with inertia in worm gear selection.
Shaft to Bore Wormwheel Gearboxes
Shaft to bore worm gearboxes are engineered for ≤30 arc a few minutes of backlash. Available ratios range between 5:1 to 120:1 with single-ended or double-ended output 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 boosts to 3,000 RPM
Backlash as low as 4 arc minutes
Flange Wormwheel Gearboxes
Flange gear reduction boxes have a compact footprint and create an output at 90° from the input. Obtainable in a variety of sizes with single-ended or double-ended output shafts, and with standard 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 1 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 so are offered with reduction ratios which range from 5:1 to 120:1. Optional NEMA 17 and NEMA 23 inputs can be found, in addition to single-output or double-output 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 only 4 arc minutes
Miniature Wormwheel Gearboxes
Miniature worm gear decrease boxes are greased forever and offered in metric sizes with ratios ranging 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°
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 input and output shafts and are essentially two reduction gearboxes within a unit. Dual ball bearings and long term lubrication provide years of dependable high cycle performance. Pick from three body sizes with ratios ranging 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 small worm drive gearbox is designed to deal with demanding power transfer applications and is available with a 5:1, 10:1 or 20:1 gear 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°
Output 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 Casing are financial yet deliver superior efficiency.