A new series of hollow-shaft right angle helical gear drives from Sterling Instrument feature built-in keyways plus left or right hand rotation. Identified as the S991HY-... Series, the gear drives feature heavy-duty sealed ball bearings, 1:1, 2:1 or 3:2 ratios plus rated speeds up to 1200 rpm. They are suited for most industry applications such as for use in printing, packaging and textile machinery. They are made with an aluminum alloy, hard-anodized case, 1144 steel, hollow bore shafts, and 4140 heat-treated steel gears. Their hollow-bore sizes range from 5/8” to 3/4” and their maximum operating temperature is 93,3 °C.
Edited by: Jürgen Wirtz