Rigid Shaft Couplings



Rigid couplings are a type of coupling that should only be utilized when shafts are precisely in line. A rigid coupling is only suitable for shafts in close alignment or held in alignment. If not aligned, torque will transfer to the shafts and bearings and likely cause premature failure. Unlike most other types of couplings, there is no flexible element in a rigid coupling.

There are three main types of rigid couplings: sleeve, flanged and clamped. For commercial shafting, a rigid coupling may be a sleeve with the shafts pressed into each end or it may be a clamping sleeve. The sleeve on each shaft end may have an external flange with bolt holes. Couplings for large power machines are bolted together to hold the shafts rigidly; therefore the shafts must be accurately aligned before assembly.

Here is a list of Manufacturers / Brands that we represent:

  • Regal PTS (KopFlex)
  • Rexnord (Falk)
  • Baldor (Dodge)
  • Renold
  • Collars and Couplings
  • Climax
  • Royersford
  • Altra Motion (Boston, Ameridrive/ Zurn)
  • Dalton
  • Lovejoy
  • Ruland
  • Stafford
  • QM