Our flexible shaft coupling products satisfy a wide variety of applications where precise positioning and control of machine components is required. We offer a broad line of standard designs with a variety of configurations to match your size and torque requirements.


Our stainless steel welded diaphragm couplings provide:

  • Low wind-up (rotational deflection between driver and load)
  • Low backlash (from reversing or varying loads)
  • Constant rotational velocity
  • Low inertia
  • High corrosion resistance
  • Ability to withstand extreme temperature conditions
  • Reliable axial and angular characteristics

Meeting Your Needs

Our standard bellows shaft couplings are available in bore sizes ranging from .090 to .625 inches [2.29 to 15.88 mm] with maximum torque ratings of 25 to 5000 in-oz [0.1 to 19.2 N•m].

If you don’t find a standard product that meets your application requirements, we can design a custom product for you.

Design Fabrication Cost-of-Ownership Additional Specifications

The Senior Advantage

  • Experience – Decades of proven service
  • Speed – Standard and custom designs fast and right
  • Flexible – Designs for a wide variety of applications (torque/size requirements)

The Senior Advantage

  • Variety of metals to suit environments (e.g. high corrosion resistance)
  • Trouble-free operation (Reliable axial/angular characteristics)

The Senior Advantage

  • We “engineer-in” ultimate reliability & extreme performance
  • Zero maintenance/service
  • Extended lifecycles

OTS Couplings

  • Bore size range
  • Torque ratings
  • Custom designs are welcome

Product Resources

Coupling Bellow Design Datasheet