NEW HYDE PARK, N.Y.—Stock Drive Products/Sterling Instrument (SDP/SI) has expanded its component offering with the introduction of a new series of Fairloc® Hub Miter and Bevel Gears. The precision gear sets include the unique Fairloc hub design, are machined from stainless steel and anodized aluminum, and are offered in a variety of ratios, the company reported in a press release.

The Fairloc hub precision miter and bevel gear sets S13F3Z-72 (72 pitch), S13F4Z-64 (64 pitch), and S13F6Z-48 (48 pitch) are available as standard catalog items, but can be customized to meet client requirements, such as different number of teeth, different pitch, bore size, or passivation. The one-piece construction is said to eliminate the need for two separate components, a clamp and split-hub bevel gear, resulting in greater reliability and time and cost savings.

The compact, self-contained Fairloc hub is reported to provide a number of advantages, better reliability of fixing the gear to the shaft, superior accuracy of clamped gear runout to the shaft, and easy adjustment. Fairloc can be tightened and released repeatedly without marring the shaft, the company said.

“Many of our customers have switched to the Fairloc® hub design, not only for gears, but also pulleys and couplings, and the numbers are growing,” said Cris Ioanitescu, applications engineering manager, in a statement. “Our increased gear-cutting capacity and improved methods of production are resulting in shorter lead times and an expanded product mix.”

SDP/SI ( is an ISO 9001:2008- and AS9100C-certified company that provides mechatronic-based design, engineering, and manufacturing services for critical motion control applications, including aerospace, defense, and medical. The company reports that it specializes in high-quality machined parts, molded components, precision gears, and gear assemblies.

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