Stock Drive Products/Sterling Instrument
SDP/SI ISO 9001 producers of Spur Gears Helical Gears Internal Gears Bevel Gears Plastic Gears Miter Worm Precision Rack Pinion ring Gear blanks spiral Anti-Backlash Dials nylon machined Worms ground custom spline gears and all other type of Gears
http://www.sdp-si.com/eStore/CoverPg/Gears.htm

Rush Gears Custom Spur Gears
Nobody makes gears faster - prototypes, production runs, variety of materials
http://www.rushgears.com

Chicago Gear Works
Manufacturers of custom gears, miter gears, worm gears and worm sets, spur gears, bevel gears, and Coniflex gears.
http://www.chicagogearworks.com

Allenberry Gears
ALLENBERRY GEARS, an QS-9000 & ISO-9002 Company, manufactures & exporters of GEARS, autoparts, transmmission gears, differential gears, engine gears, gearboxes at Faridabad, India
http://www.allenberrygears.com

Spicer Industries Inc.
Molded nylon and plastic cut gears in metric module and standard pitch are available in spur gears with hub, miter gears, bevel gears, worms, sprockets and racks. Please inquire for custom gears in steel, brass, aluminum and other materials.
http://www.spicerindustries.com

Gear Motions, Inc.
Two manufacturing locations provide gear grinding and cutting services for spur, helical, and bevel gears as well as sprockets and splines at Gear Motions.
http://www.gearmotions.com

OEMsuppliers.com - Powder Metal Parts
Manufactures powder metal gears and structural parts. Helical gears, worm gears, spur gears, bevel gears, pinion gears.
http://oemsuppliers.com/pm1.shtml

Spencer-Pettus Printing and Industrial Gears
Custom engineered and machined gear components and gearbox repairs
http://spgear.com/

Gear Cutting Co. Ltd
gear cutting and gear manufacturing in the uk - spur gears, helical gears, bevels, worm wheels, splines & power transmission
http://www.gearcutting.com

Gears simulator
Use Gears simulator to design and simulate mechanical systems including gears, chain and belt drives and other components. Includes the online help and FAQs. A 30 days trial demo can be downloaded.
http://www.terra.es/personal/jdellund/simulator.htm