For over 90 years Kohara Gear Industry (KHK) has engaged in the production of hardened components. The dedication to this product has resulted in sourcing world-class equipment and training of personnel in world-class production methods.
Hardened gears undergo heat treatment processes including induction hardening, carburizing, and through-hardening to achieve superior surface hardness and wear resistance while maintaining tough, ductile cores for shock resistance.
Kohara Gear Industry is both ISO 9001:2015 and ISO 14001:2015 certified. Every hardened component 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 hardened components needs.
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 hardened components for any application.
In addition to hardened components, 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.
Because we are the largest and best source for hardened components, we provide free resources including How To Select Gears, free gear calculation software, and free gear drafting software.
KHK’s hardened components are available in a wide range of modules from 0.5 to 10, covering fine pitch, medium pitch, and coarse pitch applications.
Factory direct from Japan — 87+ years manufacturing excellence. Ships anywhere in the USA in 3 business days. ISO 9001:2015 & ITAR certified.
