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Precision internal gears from Quality Transmission Components are stocked in 22 sizes in modules 1 through 3. These 20^o pressure angle internal gears, identified as the SI and SIR Series, are made from S45C steel which are black oxide coated and have tooth hardness less than 194HB. They can be combined with available spur gears to make planetary gear drives. Both Series can be cut to make segment gears or corner racks. The SI Series conforms to JIS N8 grade, and the SIR Series conforms to JIS N9 grade standards.

At the new QTC eStore you can get immediate quotes, download 3D models, and place online orders. Go to: http://www.qtcgears.com/RFQ/default2.asp Other power transmission solutions provided by QTC include over 9,000 off-the-shelf timing belt pulleys, belts, belt and roller chain tensioners and other components for prototypes and production applications.

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These gears are designed to fit shafts ranging from 1/8" to 3/8" (4 mm to 10 mm) in diameter. The suggested clearance between the bore and the shaft is .0001"/.0008" (shaft tolerance of g6,h6 or h7).

A new series of 148 inch and metric hub (spur) gears manufactured by Sterling Instrument feature the patented Fairloc® integral hub fastening system which eliminates marred shafts.

Other Quality Transmission Products:

• Spur Gears
• New! Planetary Gearheads
• New! Diametral Pitch Gears
• Helical Gears
• Internal Gears
• Racks
• Racks & Pinions
• Miter Gears
• Bevel Gears
• Screw Gears
• Worms, Worm Gears
• Other Products - Including
• Pawls & Hubless Ratchets,
• Gear Couplings
• and Involute Spline Shafts and Bushings

About Quality Transmission Components:

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 QTC's New Catalog, Q420: The Handbook of Metric Gears