A new series of pressure locking hub connectors from Sterling Instrument (ISO 9001+AS9100 Registered Manufacturer) are designed for fast and accurate repositioning of the hub. Radial screw positioning saves space along the shaft. Uniform surface pressure against the shaft and hub prevents damage to the surfaces and enables the use of small diameter hubs. These hardened steel connectors handle a temperature range of -22°F to +180°F. Hub bore sizes range from .748" to 1.811" and from 18 mm to 54 mm.

Identified as the S21BPY-... Inch Series and the S21BPYM... Metric Series they feature easy, space saving use with no wear or stress on the components they are mounted to. Here's how they work. When the pressure screw is tightened the double-walled sleeve and hub expands uniformly against shaft and hub and creates a rigid joint. Dismantling is done by loosening the screw which returns the connector to its original dimensions. It can then easily be dismantled.

Quotes, online orders, and 3D CAD Models are available at our updated eStore at: https://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 D810 and 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