SDP/SI is a U.S. Manufacturer of Power Transmission and Motion Control Products since 1950

Precision Gears and Small Mechanical Components Available online

We understand the importance of quick turnaround times for your projects, and we're here to help! SDP/SI offers a wide range of stock components, including pulleys, timing belts, gears, bearings, shafting, couplings, speed reducers, fasteners, motors, gearheads, and more, making it easier for you to move your project forward. Plus, we provide engineering assistance whenever you need it!

At SDP/SI, QBC, and QTC Metric Gears, we offer a wide range of components and expert services to make your design and product selection process a breeze! Our user-friendly online e-Store is here to simplify everything, with AI-powered search, helpful calculation tools, gear design data, 3D CAD models, and detailed product specs—all designed to help you work smarter and faster.

We know how important quick turnaround times are for your projects, and we’re here to support you every step of the way. With a huge selection of stock components, including pulleys, timing belts, molded and machined gears, bearings, shafting, couplings, speed reducers, fasteners, motors, and gearheads, we make it easy to keep your project moving forward. And if you need extra help, our experienced engineering team is ready to provide guidance, review your design, suggest the right components, and even create custom components or full assemblies tailored to your needs.

Let us help you get the job done! Standard inch and metric dimensioned components are offered online, many shipping within 24 hours. E-Store: https://shop.sdp-si.com

• Timing Belts and Pulleys

for easy selection go to: SDP/SI Center Distance Designer Tool

• Precision Gears / Commercial Gears
• Gearboxes
• Molded Components
• Coupling – simplify your search, click here for the SDP/SI Coupling Selector Tool
• Bearings
• Vibration and Shock Absorbing Components

Integrated Engineering and Manufacturing

Learn more about our in-house design, engineering, and manufacturing capabilities.

AS9100 and ISO 9001 registered

SDP/SI - Stock Drive Products/Sterling Instrument, a Designatronics company
250 Duffy Avenue, Hicksville, NY 11801
Phone: (516) 328-3300; (800) 819-8900
https://shop.sdp-si.com