SDP/SI Is an ISO 9001 manufacturer of over 540 sprockets, Roller Chain Sprockets, Ladder Chain Sprockets, and Hubless sprockets.
At SDP/SI we can modify our standard catalog parts to your spec or produce completely custom components for you. SDP/SI uses our state-of-the-art CNC production facilities to enable us to keep our custom prices very competitive. For modified standard catalog parts or custom components please call our Application Engineers and/or describe your part on the Email form to the right.
Stock Drive Products and Sterling Instrument are major ISO 9001:2000 Certified operating divisions of Designatronics Incorporated, a company that began in 1960 as a manufacturer of small mechanical products. Today, Designatronics serves a worldwide customer base in excess of 15,000 accounts rang-ing from Fortune 100 companies to emerging hi-tech firms.
To order any of the Stock Drive Products / Sterling Instrument Catalogs:
Available for order and/or download:
- Interactive CD Rom D710 (including instant viewing of 68,000 Drive Components 10x faster than the internet alone!
- New Conidrive™ Belt Drive Catalog DN10 also DN10 in HTML / PDF format
- New Feed & Idler Roller Catalog D150 also D150 in HTML / PDF format
- Handbook Of INCH Drive Components, Catalog 790-2 (1,184-pages) also 790-2 in HTML / PDF format
- Handbook Of Metric Components,Catalog 785 (1,240-pages) also 785 in HTML / PDF format
- Gearheads D125 Catalog (256 Pages) also D125 in HTML / PDF format
- Handbook of Timing Belts & Pulleys, D265 (480-pages) also D265 in HTML / PDF format
- Handbook of Fairloc® Components, D242 (96-pages) also D242 in HTML / PDF format
- Drive Component Design Textbook, D757 (784 Pages) also D757 in HTML / PDF format
To View our entire product line including specifications, additional information and pricing and ordering information,
click on the product areas below for more information:
- Bearings
- Belts & Cables
- Brakes
- Clutches
- Couplings
- Fairloc® Components
- Flexible Shafts
- Gears & Gear Clamps
- Gearheads, Motors, Gearmotors, Right Angle Drives, Speed Reducers
- Fasteners, Dials & Other Hardware
- Linear Motion
- Machine Screws
- Motors
- Timing Belt Pulleys
- Retaining Rings
- Roller Chains
- Shaftloc® Components
- Shafts & Accessories
- Right Angle Speed Reducers
- Springs
- Sprockets
- Universal Joints
- Vibration Mounts, Shock Mounts and Isolators
About SDP/SI – Stock Drive Products / Sterling Instrument:
Stock Drive Products and Sterling Instrument are major ISO 9001:2000 Certified operating divisions of Designatronics Incorporated, a company that began in 1960 as a manufacturer of small mechanical products.


