Wednesday, January 13, 2021 By Dave Basila

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Stock Drive Product/Sterling Instrument’s new facility in Hicksville, NY is a state of the art 96K sf manufacturing and engineering facility. I am very impressed with the streamlined operation, cleanliness and professionalism I witnessed in the facility.

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Along with a lot of new cutting-edge equipment, SDP/SI is fully ISO 9001:2008 + AS9100D certified with a high level of automation and lights-out manufacturing capabilities. SDP/SI manufactures precision motion components in the USA, providing standard, tailored and full custom solutions.

Today I’d like to share an overview of their Shaft Couplers.

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SDP/SI provides a wide variety of shaft couplers for flexible or rigid applications.  They use a variety of materials and designs to meet the specific torque, speed, angle and other requirements of your system. Fairloc® hubs are available to make them easy to use as well as provide precise alignment.

Standard shaft sizes from .0625” to .625”

Types of couplings

Bellows Gear Grip Flexible Spring
Flexible Slit type Spider Type Neo-Flex
Helical    Flexible Spline Disc Type
Sleeve Type Miniature Ball Rigid
Flexible Jaw Type Oldham Couplings Spring Wrapped
K Type Torque Tube Rigid Fairloc
High Speed   Anti Vibration

Flexible Coupling Shaft

Every application with shafts requires careful consideration of the system requirements to achieve optimum performance.  Application information and product specifications are readily available on the website.

To help you find the appropriate coupling for your application try the Coupling Selector Tool:

SDP/SI is a leading manufacturer of small mechanical components, servicing a wide variety of aerospace, medical, defense, automation, and commercial industries for over 70 years. Quotes, online orders, and 3D CAD Models are available on their updated estore at

SDP/SI offers over 87,000 small mechanical components, including gears, belt and chain drives, pulleys, shafts, shaft accessories, bearings, couplings, universal joints, vibration mounts, miscellaneous components, hardware, gearheads and speed reducers, right angle drives, brakes and clutches, motors and gearmotors. Capabilities include custom design, manufacturing, and assembly.

 For additional information about SDP/SI please visit