Gears & Gear Manufacturers

Gears are mechanical devices that transfer torque and motion or set mechanical motion in action through the engagement of other gears, a shaft or a series of parts. Gears interlock with one another and turn together with the help of evenly cut teeth. Teeth allow different sized and shaped gears to interlock with one another. Gear applications are quite diverse and highly customizable; they appear anywhere that an application requires speed reduction, speed increase, power transmission, motion transmission or force reduction. The relationship between gear size and speed is called “speed ratio,” or alternatively, “gear ratio.” Gear ratio can be calculated using a gear’s number of teeth. For example, two interlocking gears that have 60 teeth and 30 teeth, respectively, have a gear ratio of 2:1.

The world of industrial gears is quite varied. Some common ones include: spur gears, sprockets, planetary gears, bevel gears, spline gears, helical gears, rack and pinion spur gears, rear end gears, worm gears and differential gears. The spur gear, also called a straight-cut gear, is the simplest type of gear available. Straight-sided along the gear wheel’s axis, with straight teeth in line with the axis, spur gears are frequently used as sprockets. Sprockets are thin gears with easy-locking teeth that lock into roller chains, like bike gears. They’re used for non-slip pulley power transmission. Other types of spur gears transmit motion and torque laterally through compatibility with other parallel aligned gears. Such gears are main components in planetary gears. Planetary gears, also called epicyclic gear trains, are used in complex applications that require smooth torque transmission, such as drivetrains and automotive transmissions.

Some Leading Manufacturers

Omni Gear & Machine Corporation

Joliet, IL | 800-876-7216

Omni Gear & Machine manufactures a diverse range of custom gears. Whether you need spur gears, helical gears, sprockets, splines, or worm gears, we can create the right gear for your applications. Service and quality come first at Omni Gear & Machine. Every gear is manufactured to your specifications, and we will work with you throughout the whole process to ensure that we satisfy your production requirements. Let us know how we can serve you by giving us a call today!

Commercial Gear & Sprocket Company, Inc.

East Walpole, MA | 800-491-1073

With over 65 years of experience manufacturing all kinds of gears, Commercial Gear & Sprocket is the obvious choice for superior expertise and quality. OEMs from the construction, mining, medical, transportation, and defense industries have come to insist on our outstanding gear and sprocket products. Your custom requirements are no problem for our experienced staff. We manufacture bevel gears, helical gears, splines, sprockets, and much more! Visit our website or call us for more information!

The Adams Company

Dubuque, IA | 563-583-3591

Custom manufacturer of spur, helical, straight bevel, and worm gears. Gears feature pitches as coarse as 2.5 diametral, with ratios from 1:1 to 1:10 & maximum face widths up to 3.5 in. Gears are available with straight teeth with coniflex or conventional bearing.

KHK USA

Mineola, NY | 516-248-3850

KHK USA is a leading manufacturer and supplier of industrial gears. We have been manufacturing high quality industrial gears since 1935, so you can count on us for superior expertise, reliability, and performance. We manufacture all kinds of gears, including spur, helical, internal, miter, screw, worm, and bevel gears. Whether standard or custom, we can engineer a gear to meet your needs. Get in touch with us today to see what we can do for you!

Butler Gear Co., Inc.

Butler, WI | 262-781-3270

Butler Gear Co. is your gear manufacturing specialist! We can manufacture a broad range of custom gears for virtually any application. With our versatile manufacturing capabilities, we can fabricate small, medium, and large diameter helical gears, spur gears, sprockets, worm gears, internal gears, rack gears, splines, and more. We utilize advanced manufacturing technology and processes to deliver quality products quickly and to specifications! Call us to discuss your requirements and applications!


The spur gear used by planetary gears is called a “sun spur,” which is surrounded by three-plus exterior gears called “planet gears.” Bevel gears are conically shaped, allowing them to interlock with other gears perpendicularly, making them useful for rear end wheel torque applications. Bevel gears have either straight or curved teeth, in which case they are called spiral bevel gears. Curved teeth are helpful for speed reduction of process machines like packaging machinery, textile looms, material handling systems and conveyor systems. Spline gears are either cylindrical or rod-shaped with straight teeth that allow them to transmit motion laterally by fitting inside internal devices or gears.

When manufacturers design industrial gears, they choose teeth numbers and gear ratios with the knowledge that these determine a gear’s durability and strength, as well as the speed, function and control the gear will wield within a larger assembly. To help gears withstand wear and tear, they may also use a variety of cutting techniques, such as gear hobbing. To increase or reduce a shaft’s rotational speed, manufacturers join differently sized gears. These gears may be made from any number of materials, depending on their application requirements. Most are made from metals or hard plastics. Demanding automotive applications, for example, engage hard metals like copper, brass, steel and, occasionally, titanium. In contrast, machinery applications that require lightweight components often utilize water-resistant plastics like polycarbonate and nylon. Also, to extend and improve the working life of gear systems, gears generally use some form of lubrication. Well-maintained gears yield great results.

Omni Gear & Machine Corporation

Spur Gear ManufactuingIndustrial Gears – Omni Gear & Machine Corporation