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Stock Drive Products and Sterling Instrument were founded by engineers, Established in 1960. ground shafts drill rods hardened hollow drawn  Shaftloc® Sleeves shaft extenders reducers collars Fairloc stainless steel reducer extender


SDP/SI ON-LINE eStore offers: Compression Springs, Constant Force Springs, Belleville Spring Washers, Extension Springs, Neg'ator Constant Force Springs, Spring Motors, Spring Motor Assembly, Spring Posts, Power Reels and Torsion Springs.

Click on [Inch] or [Metric] to go directly to our eStore and shop online. Click on Press for press release.

Products: Gears, Drive Components, Shafting and Shaft Accessories, Bearings, Couplings. Quote Request, Engineering Tools, RoHS Compliant Download, Featured Products and Trade Shows. Buy Online About us:  Stock Drive Products/Sterling Instrument strives to be the best manufacturers of quality electromechanical components & assemblies. Capabilities:  Machinery List, Facility Brochure, Facility Tour, Engineering Tools, RoHS Statement. At Stock Drive Products/Sterling Instrument, our experienced engineering, manufacturing & inspection teams are dedicated to producing a quality component at a competitive price. Catalogs: Request A Catalog & View and Download Catalogs. Contact Us: Directories, Domestic Sales Representatives and International Sales Representatives Home
Belleville Spring Washers [Inch]
Compression Springs [Inch] [Metric]
Extension Springs [Inch] [Metric]
Belleville Washers Negator Constant Force Springs extension  Compression Springs Spring Motor Assembly Belleville Washers Negator Constant Force Springs extension  Compression Springs Spring Motor Assembly Belleville Washers Negator Constant Force Springs extension  Compression Springs Spring Motor Assembly

Neg'ator® Constant Force Spring [Inch]
Technical Library

Neg'ator® Spring Motors [Inch]
Technical Library
Neg'ator® Spring Motor Assemblies [Inch]
Technical Library
Belleville Washers Negator Constant Force Springs extension  Compression Springs Spring Motor Assembly Belleville Washers Negator Constant Force Springs extension  Compression Springs Spring Motor Assembly Belleville Washers Negator Constant Force Springs extension  Compression Springs Spring Motor Assembly
Spring Posts [Inch] [Metric]
Spir'ator® Spring Powered Reels
Base Mounted
[Inch]
Spir'ator® Spring Powered Reels
Base Mounted - Closed Case
[Inch]
Belleville Washers Negator Constant Force Springs extension  Compression Springs Spring Motor Assembly Belleville Washers Negator Constant Force Springs extension  Compression Springs Spring Motor Assembly Belleville Washers Negator Constant Force Springs extension  Compression Springs Spring Motor Assembly
Spir'ator® Spring Powered Reels
Bracket Mounted
[Inch]

Spring Powered Reels Arbor Mounted
[Inch]
Torsion springs [Inch] [Metric]
Belleville Washers Negator Constant Force Springs extension  Compression Springs Spring Motor Assembly Belleville Washers Negator Constant Force Springs extension  Compression Springs Spring Motor Assembly Belleville Washers Negator Constant Force Springs extension  Compression Springs Spring Motor Assembly

Note: Prices and specifications are subject to change without notice. Every effort has been made to provide accurate technical and product information. The company disclaims responsibility for any error or omission in the accuracy of the technical and product information published.torsion springs spring extension springs spring motor motors springstorsion springs spring extension springs spring motor motors springstorsion springs spring extension springs spring motor motors springstorsion springs spring extension springs spring motor motors springstorsion springs spring extension springs spring motor motors springstorsion springs spring extension springs spring motor motors springstorsion springs spring extension springs spring motor motors springstorsion springs spring extension springs spring motor motors springstorsion springs spring extension springs spring motor motors springstorsion springs spring extension springs spring motor motors springstorsion springs spring extension springs spring motor motors springstorsion springs spring extension springs spring motor motors springstorsion springs spring extension springs spring motor motors springstorsion springs spring extension springs spring motor motors springstorsion springs spring extension springs spring motor motors springstorsion springs spring extension springs spring motor motors springsball bearings ceramic bearing linear thrust needle roller miniature stainless steel spherical plastic frelon lined sleeve inner races ball bearings ceramic bearing linear thrust needle roller miniature stainless steel spherical plastic frelon lined sleeve inner races ball bearings ceramic bearing linear thrust needle roller miniature stainless steel spherical plastic frelon lined sleeve inner races ball bearings ceramic bearing linear thrust needle roller miniature stainless steel spherical plastic frelon lined sleeve inner races ball bearings ceramic bearing linear thrust needle roller miniature stainless steel spherical plastic frelon lined sleeve inner races ball bearings ceramic bearing linear thrust needle roller miniature stainless steel spherical plastic frelon lined sleeve inner races ball bearings ceramic bearing linear thrust needle roller miniature stainless steel spherical plastic frelon lined sleeve inner races ball bearings ceramic bearing linear thrust needle roller miniature stainless steel spherical plastic frelon lined sleeve inner races ball bearings ceramic bearing linear thrust needle roller miniature stainless steel spherical plastic frelon lined sleeve inner races ball bearings ceramic bearing linear thrust needle roller miniature stainless steel spherical plastic frelon lined sleeve inner races