Since 1985, Quality Transmission Components (QTC) has been a leading supplier of medium and coarse pitch metric gears throughout the United States, Canada and Mexico. QTC is the exclusive North American distributor for Kohara Haguruma Kogyo K.K. (KHK Gear Industry Co., Ltd.) of Saitama, Japan. As Japan’s largest independent gear manufacturer, KHK produces over 3600 standardized, medium and coarse pitch metric gears, and gear related items. KHK’s modern, ISO 9001:1994 certified facilities utilize sophisticated gear cutting and grinding equipment to serve the gear needs of many Japanese original equipment manufacturers.

Selecting stock metric gears has been simplified since the introduction of our catalog, Q410: The Handbook of Metric Gears. In addition to the product offerings, this 456-page catalog contains a comprehensive technical reference section entitled “Elements of Gear Technology”. The topics covered include the principles of involute gearing, gear dimension calculations, the definition of backlash, plastic gear design, elements of gear accuracy, principles of surface contact, methods of lubrication and methods for noise reduction. The product section includes detailed specifications for our complete offering of:

• Spur gears
• Helical gears
• Ring gears (Internal & External)
• Racks (Straight, Helical & Flexible)
• Miter gears (Straight & Spiral)
• Bevel gears (Straight & Spiral)
• Worms & Worm Wheels (Standard & DuplexTM)
• Screw gears
• Involute splines (Internal & External)
• Ratchets & Pawls

Gear couplings These products are offered in sizes from module 1 thru module 10, in materials that include alloy steel, carbon steel, stainless steel, cast iron, aluminum bronze, brass, cast bronze, nylon, and acetal. A complete inventory of KHK’s product line is maintained at our warehouse in Garden City Park, New York and we replenish our stock from the factory’s inventory on a bi-weekly basis.

In addition to our extensive standard product line, we can also supply build-to-print custom gearing in quantities from prototype to production.

New Product Information

NEW PRODUCT CATALOG Q460
The process of selecting timing belt pulleys, belts, belt and roller chain tensions and other power transmission components for new prototypes or for production applications just became easier with the publication by Quality Transmission Components of a FREE 368-page catatog, identified as Q460.

Metric Gears, Large Off-The-Shelf Selection
Designing with metric gears just became easier with the introduction of a newly expanded series of metric gears from quality Transmission Components. OTC now features approximately 3,400 products in 76 types of standardized 20 degree pressure angle metric gears.

Stainless Steel Gears Feature Fairloc®
New Series of Stainless Steel Gears Feature The Fairloc® Integral Fastening System

Flexible Molded Duracon and Steel Racks
New Series of Flexible Racks from OTC Are Designed for Low Cost Linear Indexing or as Internal or External Gears