Double Worm Gearing
The exclusive usage of the involute helicoid thread form on the worm and gear offers high efficiencies and lengthy service lifestyle. The hardened, surface and polished alloy metal worm develops a easy, work hardened surface on the bronze equipment. Because of this, the worm gears wear in and improve with prolonged service while additional gears are wearing out.
Product Features
Single,Dual and Triple Reductions Ratios of 5:1 to 175,000:1
Center distances of 2″ to 20″
Drywell construction upon 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 capability “C” Face motor flanges
Motor scoops
ouble Reduction Worm Gearbox
Ever-Power Double Decrease Worm Gearboxes are two stage worm reduction units.
A specifically designed primary worm decrease device is integrally mounted upon a standard single decrease Ever-Power worm gearbox which forms the second stage. The composite products provide the most compact and rigid arrangement for large reduced amount of speed necessary for slower shifting machinery. A wide range of ratios up to 4900:1 is available.
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 collection of commonly used ratios from the entire range of Ever-Power Dual Reduction Worm Gear Box. Information on other ratios available 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 made from 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 flexibility of shaft layout is definitely permissible with all types of Double Reduction models. The dimension drawing for each series shows the various shaft handing arrangements and the appropriate reference should always be quoted when buying.
Our standard 700 Series – the heart of Ever-Power swiftness reducer products – has been serving industry reliably for over 40 years. Its confirmed modular style has set the industry standard for performance and is the most imitated item in today’s worm gear velocity reducer market. But why accept a knock-off when you can have the initial – from Ever-Power.

Specifications
11 basic single 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 virtually any position.
Housings are straddle-milled, best and bottom, for precise alignment of horizontal and vertical bases.
Internal baffles assure positive, leak-free venting.
The 700 Series’ rugged housing, fabricated of fine-grained, gear-quality cast iron, provides maximum strength for optimum durability, as well as greater precision during worm and gear alignment.
Ever-Power’s 700 Series high-strength bronze worm gear is straddle mounted between heavy-duty tapered roller bearings to increase thrust and overhung load capacities, sizes 713-760.
Our 700 Series’ high-strength steel result shaft assures capacity for high torque and overhung loads.
Pipe plugs allow easy fill up, level, and drain in virtually 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 can be found in our eCatalog.
DOUBLE REDUCTION GEAR
Ever-Power Double Reduction Worm Gear Units are constructed using two single reduction worm gear devices. The primary worm gear unit is specially designed to attach integrally on a standard single worm gear device which forms the secondary stage. The complete gear unit becomes small and rigid in set up for slow shifting machinery. A wide double reduction worm gearbox selection of ratio from 75:1 to 4900:1 is available. These gear units are particularly suitable 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 decrease units are made with the same top quality elements as the single reduction Worm Gear reducers.