Gears/

Worm Gears

Worm gears are the combination of a simple spur gear and a worm. A worm is a threaded metal rod that looks like a screw. Worms distinguish themselves from screws in that they are only machined in the middle; the threads do not begin or end at either end of the rod. The spur gear comes into contact with the worm at its threaded middle section. If the spur turns, it causes the worm to rotate. If the worm rotates, it causes the spur to turn.

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Omni Gear & Machine Corporation
Joliet, IL
800-876-7216
Omni Gear & Machine is an industrial gears manufacturer specializing in precision machined & custom gears in a variety of sizes & types. Our products include spur gears, plastic gears, metric gears, helical gears, worm gears, spline gears & internal gears. Check out our website or call today! Our commitment to customers is job 1. Customers across America depend on us for quality & reliability.
 
Commercial Gear & Sprocket Company, Inc.
East Walpole, MA
800-491-1073
Commercial Gear & Sprocket can custom make almost any kind of gear or machined part up to 60" in diameter. We have been doing this since 1946 at competitive pricing & with the highest quality. Among such industrial gears are bevel gears, helical gears, worm gears and spur gears. We are members of the American Gear Manufacturers Association and our quality control department conforms to ISO 9002.
 
Andros Gear Manufacturers
Laval, QC
450-686-2403
Andros manufactures custom profile gears, gearboxes and precision machined components. Our staff takes pride in the quality of our extensive product line which includes spur, helical, bevel and worm gears, sprockets, racks and more. Using the latest manufacturing and inspection techniques we provide a complete one stop, economical solution for all your gearing and precision machining needs.
 
Atch-Mont Gear Co., Inc.
Ivyland, PA
888-505-2163
Creating prototypes through production runs since 1972, we are quite adept as a gear manufacturer. We manufacture bevel gears, custom gears, fine pitch gears, helical gears, metric gears, planetary gears, spur gears and worm gears for a multitude of applications. A philosophy of quality for a fair price coupled with personal service makes ATCH-MONT Gear your reliable and trusted source for gears.
 
Moore Machine & Gear, Inc.
Evansville, IN
812-963-3074
Founded in 1962, Moore Machine & Gear has developed a reputation nationwide as a manufacturer of custom gears. A knowledgeable staff can assist you from design to fabrication to finish for quality helical, worm, pump, bevel gears and more. With capabilities including hobbing, shaping, grinding, turning and milling, heat treating, fabrication and assembly, you are sure to get more with Moore.
 

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Marples Gears, Inc.
San Gabriel, CA
800-276-4327
Marples Gears is a manufacturer of precision gears. Our product offering includes spur, helical, spline, worm, metric gears and more. We are certified to MIL-I-45208 and MIL-STD-456962. We specialize in high-precision, fine-pitch gears for precise movement and positioning requirements. We've been serving aerospace, defense, optical, space, medical & commercial industries for 60 years.
 
General Gear
Toronto, ON
416-743-4410
For almost 40 years, General Gear has been known and respected as a leading supplier of high quality loose gears, gearboxes, components and sub assemblies for a wide range of industry sectors including, industrial, aerospace, power generation and OEM. We truly are a global supplier serving over 100 customers in Canada, the USA and Europe. General Gear is a division of General Donlee Ltd.
 
Schafer Gear Works, Inc.
South Bend, IN
574-234-4116
Schafer Gear Works is a leading producer of high-precision, custom-engineered industrial gears & machined parts. Look to us for the production of your spur gears or helical gears. Since 1934, our values of hard work & commitment to customer satisfaction have been well ingrained into the culture of our company. Bring us your most demanding specifications and we'll provide effective solutions.
 
Buffalo Gear, Inc.
Sanborn, NY
888-283-3432
Have a need for custom precision gears? Contact Buffalo Gear for help! We can manufacture gears with diameters from 3/8" to 40", in stainless steel, aluminum, iron, brass, bronze and other materials. We have experience in making worm gears, helical gears, metric spur gears, ring gears and pinion gears. Manufacturing the best since 1962.
 
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Industry Information

Worm Gears

Worm gears are used to transfer torque, just like all other industrial gears, but they are capable of transferring motion at odd angles or under unusual circumstances. The tuning pins of a string bass, for example, are connected to worms, which themselves are connected to gears. Those gears are connected to rods, which are themselves each connected to a string. The worm gear is capable of resisting the tension of the string, keeping the instrument in tune. Worm gears are usually constructed of bronze, iron, or steel, but are available in a wide range of material options. Worm gears are not a recent advancement in torque transmission technology; original worm gear configurations were made of wood and were often attached to hand cranks.

Worm gears can transfer motion between axes. A gear's axis, in the case of a circular gear viewed at its face, extends from the middle of the circle out into the z axis. In the case of a worm, the axis goes through each end. The axes of worms and circular gears intersect each other when they are paired together. The transfer of torque between two axes is one of the defining features of a worm drive. Another defining feature is the control over that transfer that the configuration allows its users. Worm drives can be used to either speed up or slow down the transfer of torque. They can also multiply or resolve torque or enhance the accuracy in positioning systems. Worm and spur teeth quantities, pitch diameters, face widths and lengths are all contributing factors to the performance of a worm gear. Power transmission requirements, noise and heat generation all depend on those configurations. For less demanding applications, some worm gears can be made of synthetic materials like nylon and other plastics.

worm gear
Worm Gears Image Provided by Omni Gear & Machine Corporation