A new series of metric locking hub bushings from Sterling Instrument (ISO 9001+AS9100 Registered Manufacturer) are designed to fit hubs with limited O.D., plus eliminate keys or splines.

Identified as the S21HSCM... Series they feature improved fit concentricity, plus easy axial or angular timing. These hub bushings are made of a steel inner and outer body. Their socket head M4 or M5 locking screws are made of alloy steel with a black oxide finish. They are stocked in eight sizes ranging from bore diameters of 6 mm to 25 mm. Unit length ranges from 16.5 mm to 25 mm.

Quotes, online orders, and 3D CAD Models are available at our updated eStore at: www.sdp-si.com/eStore.

SDP/SI offers over 130,000 power transmission components including: gears, belt and chain drives, shafts, shaft accessories, bearings, couplings, universal joints, vibration mounts, miscellaneous components, hardware, gearheads and speed reducers, right angle drives, brakes and clutches, motors and gearmotors.


Detailed specifications are contained in Catalog D805, available free upon request from:

Sterling Instrument, 2101 Jericho Turnpike, P.O. Box 5416, New Hyde Park, NY 11042-5416.
Phone: 516-328-3300 • Fax: 516-326-8827