SDP/SI (800) 819-8900

Setting Ideas into Motion

SDP/SI - Stock Drive Products/Sterling Instrument provides small mechanical components, engineering and manufacturing services for industrial and commercial applications.

Our Products:

Gears
 Gears, Differentials, Ratchets and Pawls
Timing Belts and Pulleys, Chains and Sprockets
  Drive Components
Shafts and Shaft Accessories
  Shafts and Shaft Accessories
Bearings and Bearing Blocks
  Bearings and Bearing Blocks
Couplings and Flexible Shafts
  Couplings and Flexible Shafts
Vibration and Shock Mounts
  Vibration and Shock Mounts
Linear Motion Products
  Linear Motion Products
Hardware and Misc. Components
  Hardware and Misc. Components
Gearheads and Speed Reducers
  Gearheads and Speed Reducers
Right Angle Gear Drives
  Right Angle Gear Drives
Clutches and Brakes
  Clutches and Brakes
Motors and Gearmotors
  Motors and Gearmotors





Providing Product Solutions Since 1950

Since 1950, design engineers have depended on SDP/SI for high-quality components, subassemblies, and engineering expertise. As a company founded and managed by engineers we understand and respond to the developing needs of our customers better than anyone.

Over 100,000 inch and metric dimensioned components are available for fast turnaround. When a standard product won't meet your requirements we can provide alternative solutions through custom design and manufacturing. Our engineering and manufacturing teams will partner with you throughout the entire process. By providing design, development, manufacturing, assembly, and testing in one location we can ensure the end product will meet your expectations.

Design Tools

Center Distance Designer
Find the correct center distance for your belt and pulley application
Coupling Selector
Find the perfect coupling easily

Latest News

See our facility




Our Company
About DesignatronicsOur Management ApproachQuality Management SystemPress Releases and Events
Brands
SDP/SI - Stock Drive Products / Sterling Instrument QTC METRIC GEARSQuality Bearings and Components
Ordering Information
Terms and ConditionsPrivacy PolicyPaperless Invoices
Connect
FacebookLinkedinGoogle+Google+ (SDP/SI)Twitter