Ever-Power worms and worm gears provide a highly effective answer for power transmission applications requiring high-ratio acceleration reduction in a restricted space using right angle (90°), nonintersecting shafts. When properly applied, worms and worm gears provide the smoothest, quietest form of gearing.
Because the efficiency of a worm gear drive depends on the lead angle and amount of begins on the worm – and because increased effectiveness is always an objective, the ratio ought to be kept as low as possible. To run correctly, worms and worm gears used together will need to have the same diametral pitch and threads.
Our complete line of worms and worm gears can be ordered through the Ever-Power Gear Guaranteed Same Day Shipment Plan for the fastest worm drive shaft delivery possible.
Worm gears are usually used when large swiftness reductions are needed. The reduction ratio depends upon the number of begins of the worm and quantity of the teeth on the worm gear. But worm gears have sliding get in touch with which is noiseless but will produce heat and have relatively low transmission performance.
For the materials for creation, in general, worm is made from hard metal as the worm gear is manufactured out of relatively soft metal such as for example aluminum bronze. This is because the number of tooth on the worm gear is relatively high compared to worm with its number of starts being usually 1 to 4, by reducing the worm equipment hardness, the friction on the worm teeth is reduced. Another characteristic of worm manufacturing is the need of specialized machine for gear trimming and tooth grinding of worms. The worm gear, however, may be made with the hobbing machine utilized for spur gears. But due to the various tooth shape, it is not possible to cut many gears simultaneously by stacking the gear blanks as can be carried out with spur gears.
The applications for worm gears include equipment boxes, fishing pole reels, guitar string tuning pegs, and where a delicate velocity adjustment by utilizing a sizable speed reduction is needed. When you can rotate the worm gear by worm, it is generally not possible to rotate worm by using the worm gear. This is called the self locking feature. The self locking feature cannot continually be assured and a separate method is recommended for true positive reverse prevention.
Also there is duplex worm gear type. When working with these, it is possible to change backlash, as when one’s teeth wear necessitates backlash adjustment, without needing a change in the center distance. There are not too many producers who can generate this kind of worm.
Wormwheel gearboxes go by several names, including 90-degree gearboxes, right angle gearboxes, velocity reducers, worm equipment reducers and worm drive gearboxes. Gear reduction boxes feature a gear arrangement when a gear in the form of a screw, also referred to as a worm, meshes with a worm equipment. These gears are usually created from bronze and the worms are metal or stainless steel.

While worm gears act like a spur gear, the worm gearboxes are significantly smaller than other gear reduction boxes. A main benefit of worm equipment reducers is certainly that they produce an output that is 90° from the input and can be utilized to transmit higher torque or decrease rotational speed. Most often, a worm gearbox has right hand threads; to improve the direction of the output, a left-hand thread worm gearbox is required.
Additional advantages of worm drive gearboxes include:
High reduction ratios
High torque multiplication
Quiet operation
Absorbs shock loads
Wormwheel Gear Reduction Boxes Provide Effective Speed Reduction in A Compact Design
Even though gear reduction boxes are small, they deliver high power efficiency in a number of operating scenarios. Worm drive gearboxes are typically found in applications requiring huge quickness reductions in a small space. Examples of common movement control applications include:
Tuning instruments
Elevators
Conveyor belts
Automated gates
Precision Manufactured Worm Drive Gearboxes
Ever-Power designs and manufactures precision correct position worm gearbox systems in ten frames sizes in shaft to bore, hollow bore flange install, NEMA flange, high ratio, small, and miniature and Molded Glass Filled Housing configurations. Customized worm gearbox systems are also offered. Contact our application engineers to discuss your custom requirements.

Output torques since high as 420Nm are available. The majority of our worm equipment reducers are built with ≤30 arc-moments backlash and may be supplied with as low as ≤4 arc-minutes backlash.
NOTE: Worm gearboxes SHOULD NOT be used as speed increasers.