Double Worm Gearing
The exclusive use of the involute helicoid thread form on the worm and gear provides for high efficiencies and long service existence. The hardened, ground and polished alloy steel worm develops a clean, work hardened surface on the bronze gear. For this reason, the worm gears put on in and improve with prolonged service while various other gears are deteriorating.
Product Features
Single,Double and Triple Reductions Ratios of 5:1 to 175,000:1
Center double reduction worm gearbox distances of 2″ to 20″
Drywell construction on vertical units
Multi-mounting configurations
Solid shaft and hollow shaft designs
Fan cooled Essential oil level sight glass
30,000 PSI gray cast iron housings High-strength alloy steel on input and output shafts
Centrifugally cast phosphorous bronze gears
High-shock load capacity “C” Face motor flanges
Motor scoops
ouble Reduction Worm Gearbox
Ever-Power Double Reduction Worm Gearboxes are two stage worm reduction units.
A specifically designed primary worm reduction unit is integrally mounted on a standard single reduction Ever-Power worm gearbox which forms the next stage. The composite products provide the most small and rigid set up for large reduced amount of speed necessary for sluggish shifting machinery. A wide range of ratios up to 4900:1 is obtainable.
Double Reduction Worm Gear Box Sizes Available with us are 40, 50, 60, 75, 85, 100, 125, 150, 175, 200, 250, 300, 350, 430.
Nominal Gear Ratios: 100:1, 150:1, 200:1,300:1, 400:1, 600:1, 750:1, 1000:1, 1200:1, 2000:1, 2800:1
Nominal ratios listed are a typical selection of commonly utilized ratios from the entire range of Ever-Power Dual Reduction Worm Gear Box. Information on other ratios on request.
Under Driven / Over Driven / Vertical Input or Output Shaft Version / Shaft Mounted Version / All types with motor mounting adaptor /
motor – optional
The worm shafts are constructed with top quality case hardening steel, accurately generated, ground and super finished. The worm tires comprise of phosphor bronze centrifugally cast rims of substantial sections welded to rigid centers. Considerable versatility of shaft layout is certainly permissible with all sorts of Double Reduction products. The dimension drawing for each series shows the different shaft handing arrangements and the correct reference should be quoted when purchasing.
Our regular 700 Series – the heart of Ever-Power acceleration reducer product line – has been serving industry reliably for over 40 years. Its proven modular design has set the sector standard for overall performance and is the most imitated product in the current worm gear acceleration reducer market. But why accept a knock-off when you can have the original – from Ever-Power.

Specifications
11 basic one reduction sizes
8 basic double reduction sizes
1/6 – 25 HP
5:1 – 100:1 ratios single reduction
100:1 – 3600:1 ratios double reduction
Non-flanged, NEMA C-face quill, and coupled input styles
Projecting and hollow output shafts
Projecting diameters from 1/2″ to 2-1/4″
Hollow output bore diameters from 5/8″ to 3-7/16″ (with over 20 bore sizes in share)
Features
Literature
Video
Contact
Product Features
The 700 Series’ huge oil reservoir provides efficient heat dissipation and lubrication for longer operating lifestyle.
Its multi-position mounting flexibility allows for installation in practically any position.
Housings are straddle-milled, best and bottom level, for precise alignment of horizontal and vertical bases.
Internal baffles assure positive, leak-free venting.
The 700 Series’ rugged casing, fabricated of fine-grained, gear-quality cast iron, provides maximum strength for maximum durability, as well as greater precision during worm and gear alignment.
Ever-Power’s 700 Series high-strength bronze worm equipment is straddle mounted between heavy-duty tapered roller bearings to improve thrust and overhung load capacities, sizes 713-760.
Our 700 Series’ high-strength steel result shaft assures convenience of high torque and overhung loads.
Pipe plugs allow easy fill up, level, and drain in any mounting position.
The 700 Series’ super-finished oil-seal diameters on both input and output shafts extend seal life.
Both 2D and 3D CAD drawings are available in our eCatalog.
DOUBLE REDUCTION GEAR
Ever-Power Double Decrease Worm Gear Devices are constructed using two single reduction worm gear devices. The principal worm gear device is specially designed to install integrally on a standard single worm gear unit which forms the secondary stage. The entire gear unit becomes small and rigid in arrangement for slow shifting machinery. A wide variety of ratio from 75:1 to 4900:1 is available. These gear units are particularly ideal for high torque slow-quickness drives. Worm gearing conforms to BS-721.
Worm Gear Acceleration Reducers: Double Reduction
Double Decrease Worm Gear Speed
Reducer Product Configuration
EP, Inc. manufacturers double reduction Worm Gear reducers that are designed to last. Double reduction units are made with the same top quality components as the single decrease Worm Gear reducers.