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Helical Products Company, Inc.

X Series

Cross Slot

Helical X Series Beam CouplingThe X-Series couplings offer a cost effective balance between couplings that are too stiff radially and those not stiff enough torsionally for servo-type applications. It features high torsional stiffness, low radial loads, one piece integrity, good flexibility, and zero backlash. Created for high performance motion control systems, the X-Series incorporates two flexible element sets – combining greater end-to-end rotational accuracy with radial flexibility – in one design. Configure X Series Couplings


  • Ideal for motion control applications (servo motors)
  • Up to 10 times greater torsional stiffness than beam types
  • Low cost alternative to bellows types
Relief * Major and minor diameter shafts may enter flexure area during operation Diameter shaft diagram * Dark areas indicate relief within the coupling interior


High performance motion control systems.


Available in 7075-T6 Aluminum Alloy


Integral Clamp or Set Screw (2 at 120°)

Misalignment Compensation

  • 5° angular
  • .010 inch parallel offset
  • .010 inch axial motion

Technical Data

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