This browser is no longer supported. Upgrade to Microsoft Edge or switch to a supported browser, like Chrome, Safari, or Firefox, to explore the MW Components website.

We're sorry for the inconvenience.

Products > Bellows / Couplings > Helical / Beam Couplings

W Series Flexible Beam Couplings

The W-Series combines the best features of the A-Series and the H-Series, with the convenience of metric dimensions and fasteners for your metric-based designs. The W-Series can be used in a wide range of applications from driving components with light torque requirements, such as encoders and tachometers (aluminum), to lead screws and pumps requiring greater torque (stainless steel).

CAD files for stock and standard W Series beam couplings are available for download in MW OnDemand.

Shop Helical Beam CouplingsRequest a Quote


Custom Electrical Contacts

Custom beam couplings or Helical couplings offer many benefits including, choice of material composition, simplification of assembly, and customizable attachments and tolerances suited to your specific end-use. MW specializes in custom component manufacturing, providing you with the right features to ensure proper performance. Whether you need to eliminate endplay or spring, ensure zero backlash, need to increase torsional stiffness, or reduce windup, we can create the right custom coupling for your specialized need made to your exact specifications.

Send us your specs or configure a part.

Request a Custom Quote


Beam or Helical couplings are flexible shaft couplings designed to transmit torque between shafts. Due to their curved beam configurations which allow angular movement, they can accommodate misalignments and axial motion, unlike traditional rigid couplings.


  • Metric dimensions and fasteners
  • Metric and/or inch bores available
  • General-purpose
  • Relief over Standard Bores


  • Major and minor diameter shafts may enter flexure area during operation
  • Dark areas indicate relief within the coupling interior


Used for encoder/ resolver applications, low torque pump, lead screw, and various other applications.


Available in 7075-T6 aluminum alloy or 17-4 PH corrosion-resistant steel.


Integral Clamp or Set Screw (2 at 120°)

Misalignment Compensation

  • Angular - 5°
  • Axial Motion - .25mm
  • Parallel Offset - .25mm

Technical Data - Bore Ranges



Our W beam couplings are produced using either 7075-T6 Aluminum Alloy or 17-4 PH Corrosion Resistant Steel (CRES) and are sized with metric dimensions. Specialty materials and services are available for custom coupling production. Multiple attachment styles are available for added functionality. Torque range, bore ranges, operating temperatures, speed, and other performance factors will vary depending on the configuration chosen.

For more details on available coupling configurations, review the list below for a side-by-side comparison, view our Standard Coupling Comparison Guide below.

Standard Coupling Comparison Guide

Other Beam Coupling Products

Request a Sample

Want to experience this product for yourself? Request a sample.