SDP/SI – Stock Drive Products/Sterling Instrument is a U.S. manufacturer of precision power transmission and motion control solutions, serving aerospace, defense, medical, robotics, industrial automation, and other high-performance industries since 1950. As part of the Designatronics family of companies, SDP/SI combines in-house engineering expertise with vertically integrated manufacturing to deliver reliable, application-specific mechanical solutions for demanding OEM and engineering applications.

SDP/SI designs and manufactures a broad range of precision mechanical components, including bevel gears, anti-backlash gears, helical gears, miter gears, worms and worm wheels, internal gears, gear racks, pinions, planetary gears, gearboxes, speed reducers and increasers, differentials, custom shafting, and precision mechanical assemblies. The company’s proprietary Fairloc® hub design provides enhanced shaft alignment, secure positioning, and simplified adjustability for improved system performance.

When standard catalog components do not meet application requirements, SDP/SI’s engineering team develops custom-engineered solutions tailored to exact performance, dimensional, and environmental specifications. Capabilities include specialized geometries, custom lengths and diameters, precision finishes, and fully integrated mechanical or electromechanical subassemblies.

Comprehensive in-house engineering and manufacturing capabilities include:

• Precision mechanical component manufacturing
• Custom gearbox design and production
• Complex precision machined parts
• Mechanical and electromechanical subassembly integration

Advanced CNC manufacturing capabilities include:

• CNC Swiss turning
• CNC lathe and mill-turn operations
• CNC milling and machining centers

Precision gear manufacturing capabilities include:

• CNC bevel gear cutting
• CNC hobbing
• CNC shaping
• Coniflex bevel gear generation
• Rack cutting

With decades of engineering experience and vertically integrated U.S. manufacturing operations, SDP/SI provides engineers and OEMs with high-quality, precision-engineered motion control and power transmission solutions designed for critical-performance applications.

SDP/SI – Stock Drive Products/Sterling Instrument
250 Duffy Avenue
Hicksville, NY 11801 USA

Phone: (516) 328-3300 | (800) 819-8900
Website: https://shop.sdp-si.com