Acetal Spur Gears feature Fairloc® integral hub fastener.

Press Release Summary:

Produced to ISO Class 7 specs with 303 stainless steel hubs, S1VZ05M, S1VZ08M, and S1VZ10M Series are, respectively, precision 0.5, 0.8, and 1 Module acetal spur gears. Incorporated Fairloc® integral hub fastener eliminates marred shafts. Offered in 5 mm face widths, 20° pressure angle metric gears fit 5 or 8 mm dia shafts. Products are available in sizes from 15-95 mm dia with 15-186 teeth. Gears with 10 mm bores are stocked without Fairloc hubs.

Original Press Release:

New Series Of 0.5, 0.8 & 1 Module Acetal Spur Gears from Sterling Instrument Feature Fairloc® Integral Hub Fastener

New Hyde Park, New York - A new series of precision 0.5, 0.8 and 1 Module acetal spur gears manufactured by Sterling Instrument (an ISO 9001 manufacturer) are produced to ISO Class 7 specs with 303 Stainless Steel hubs. They feature the Fairloc® integral hub fastener. These 20° pressure angle metric gears are identified as the S1VZ05M, S1VZ08M and S1VZ10M Series. Fairloc® is a patented integral hub fastener which eliminates marred shafts. The choice of Fairloc® hubs permits frequent phase adjustment, timing and position adjustment while adding positive metal-to-metal fastening strength along both hub sections. The Fairloc® integral hub fastener consists of two slots that are machined into the hub, one radially the other angularly, to create a transverse wedge which remains attached to the solid portion of the hub on one side. The resultant cantilevered clamping section has a tapped hole to accept a cap screw which passes through a clearance hole in the solid portion of the hub, and into a threaded hole in the transverse wedge section. As the screw is tightened, the cantilevered section clamps the shaft securely. The screw can be tightened and released repeatedly without marring the shaft or affecting its torque-transmitting abilities. They are stocked in 5 mm face widths and are designed to fit shafts that are 5 or 8 mm in diameter. They are stocked in a range of sizes from 15 to 95 mm in diameter and from 15 through 186 teeth. Gears with 10 mm bores are stocked hubless, without the Fairloc® hubs.

Detailed specifications are contained in SI Catalog 785 available free upon request from Sterling Instrument. This catalog can be viewed now on the Web at:, or via mail request at: 2101 Jericho Turnpike, Box 5416, New Hyde Park, NY 11042-5416. Phone: 516-328-3300 o Fax: 516-326-8827. Web:

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