A series of right angle EG planetary gearheads from Sterling Instrument, a ISO 9001:2000+AS9100B registered manufacturer, features low cost and is offered in four standard NEMA sizes: 17, 23, 34 and 42. These gearheads, identified as the S91 SREG Series, feature the planetary system, high torsional stiffness, case-hardened spiral bevel gears, and are sealed to extend service life. They offer both single and double stage design, and include a precision balanced clamp-on pinion. Woodruff keys number 404 and motor mounting hardware kits are supplied. 

Each of the four NEMA sizes is offered in 13 gear ratios ranging from 3:1 to 100:1. Their maximum input speed is 5,000 rpm. Their radial and axial shaft loading is 400 lb. Their single stage and double stage minimum efficiency is 85 percent and 80 percent respectively. Operating temperatures range from -40 degrees Fahrenheit to +225 degrees Fahrenheit. The housings are made of gold zinc plated steel. The right angle housing and mounting flanges are made of black anodized aluminum.

Quotes, online orders, available stock and 3-D CAD model downloads are available at Sterling Instrument's eStore at: www.sdp-si.com/eStore. SDP/SI offers NEMA inline gearheads, NEMA right angle single output gearheads and NEMA dual output gearheads, all in sizes 17, 23, 34 and 42.

Detailed specifications are contained in Catalog D795, available free upon request from Sterling Instrument.