Driving Innovation with Our Engineering, Design and Manufacturing Expertise
SDP/SI is a trusted U.S. manufacturer of high-precision gears, superior mechanical components and custom solutions, partnering with engineering teams in aerospace, defense, medical, robotics, and automation industries since 1950. With ISO 9001:2015 and AS9100D certifications, we offer the quality, consistency, and reliability required in critical applications.

96,000 sq. foot manufacturing facility - over 170 machines, tour our facility

Operations include:

CNC Swiss Turning, Multi-tasking Machines
• CNC Lathe (Mill - Turn) Multi-tasking Machines
• Bevel Gear Cutting
• Gear Hobbing
• Gear Shaping Coniflex Bevel Gear Generators
• Rack Cutting
• Rapid-Tooth Cutting only Capabilities
• Learn more

Our integrated design, engineering, manufacturing, and assembly services, combined under one roof, enables faster development cycles, efficient prototyping and responsive custom solutions. Our clients rely on us for:

• Precision gears (spur, helical, bevel, worm, racks and more)
• Custom gearboxes
• Timing belt and pulleys (synchronous drive systems)
• Bearings and linear motion components
• Motors, controllers, gearheads and more
• Assembly of mechanical and electromechanical subassemblies
• Engineering development - Learn more
• Prototype to high-volume production

Eliminating the need for multiple sources, we streamline your development and production processes by offering a comprehensive inventory of inch and metric standard components. In addition to SDP/SI, our Designatronics family includes QTC Metric Gears and QBC - Quality Bearings & Components, covering everything from gears, timing belts and pulleys to couplings, bearings, hardware, and vibration and shock absorbing products. Explore all the options, get product specifications, download 3D CAD models, and place orders 24/7 at our website: https://shop.sdp-si.com

From off-the-shelf parts to fully customized solutions, we deliver the performance, precision and reliability that engineers and manufacturers count on. Explore SDP/SI, download Catalogs, White Papers, eBooks, and Application Stories here!

Get to know:

QBC - Quality Bearings & Components (https://qbcbearings.com) offers a wide selection of bearings and linear motion products for aerospace, medical, industrial, agricultural and automotive industries. As an authorized stocking distributor for many of the world's largest bearing manufacturers, we have access to a broad range of products. • Specializing in discontinued and hard to find bearings plus value-added services.

QTC METRIC GEARS (https://qtcgears.com) supplies high-quality gearing for industrial and automation applications. With more than 25,000 stock metric gears, we can meet the growing need for metric gears for both OEM and MRO needs.