KHK USA specializes in custom machined gearboxes.

For over 90 years Kohara Gear Industry (KHK) has engaged in the production of custom machined gearboxes. The dedication to this product has resulted in sourcing world-class equipment and training of personnel in world-class production methods.

Custom machined gears undergo additional machining operations beyond standard production, including bore modifications, shaft integration, keyway cutting, tapped holes, and surface treatments tailored to specific application requirements.

Kohara Gear Industry is both ISO 9001:2015 and ISO 14001:2015 certified. Every custom machined gearboxe produced by KHK undergoes rigorous quality control including material analysis, dimensional verification, and performance testing.

With the largest selection of standardized metric gears in North America — over 27,000 configurations — KHK USA’s team of professionals look forward to assisting you with all your custom machined gearboxes needs.

Understanding Metric Gears

Metric gears use the module system (designated by “m”) to define tooth size, as opposed to the diametral pitch (DP) system common in inch-based gearing. Module equals the pitch diameter divided by the number of teeth, expressed in millimeters. KHK USA provides the most comprehensive selection of stock metric gears in North America, making it easy to source custom machined gearboxes for any application.

Complete Product Range

In addition to custom machined gearboxes, KHK USA offers the full range of metric gear products: spur gears, helical gears, internal gears, miter gears, bevel gears, screw gears, inch gears, worm gears, gearboxes, CP racks & pinions, racks, and other products.

Why KHK USA for custom machined gearboxes

Because we are the largest and best source for custom machined gearboxes, we provide free resources including How To Select Gears, free gear calculation software, and free gear drafting software.

KHK’s custom machined gearboxes are available in a wide range of modules from 0.5 to 10, covering fine pitch, medium pitch, and coarse pitch applications.