How to Install an Oldham Coupling

Release Date: October 3, 2013

A step by step procedure of how to install an oldham coupling. Watch the video and follow the instructions below. Please feel free to contact us if you have any questions on proper collar installation. Email:


HI, I’m Mike Langley, Welcome back to Ruland’s technical series, today I’m going to show you how to install one of our motion-controlled bellows couplings. For the installation today, we’ll need our bellows coupling, torque wrench, misalignment measuring tools and your PPE. We are ready to begin, first make sure the shaft misalignment is within the coupling’s ratings. Complete misaligned information is available on Please note that exceeding the coupling’s ratings will cause the stainless-steel bellows to deform and ultimately fail. Next, we remove the bellows coupling from its packaging and place it on the shafts. The shafts mix then into the relief portion of the bore as long as it does not exceed the strap penetration length. This information on the product specification page along with 3D CAD drawings. Fully tighten the screw on one hub to the recommended seating torque using the appropriate torque wrench. Before we tighten the screw on the second hub, we need to rotate the coupling by hand to allow it to reach its free length. Begin tightening the hub on the second shaft with the coupling axially relaxed and misalignment angles centered along the length of the coupler. Fully tighten the screw to the recommended seating torque using the appropriate torque wrench. Your coupling assembly is now complete. Thank you for viewing this video. For more installation videos, as well as technical information and CAD model, please visit

Installation Instructions

  1. Assure that the misalignment between shafts is within the coupling's ratings.
  2. Slide a hub onto each shaft to be joined with the drive tenons facing each other.
  3. Rotate the hubs on the shaft so the drive tenons are located 90° from each other.
  4. Place a torque disk so one groove fits over the drive tenons of a hub and center the disk by hand.
  5. Insert a shim with the thickness of the coupling's axial motion rating into the groove of the torque disk.
  6. Slide the tenons of the second hub into the mating groove in the disk until it touches the shim stock.
  7. Fully tighten the screw(s) on each hub to their recommended seating torque.
  8. Remove the shim stock to leave a small gap between the top of the drive tenons and the torque disk to allow for axial movement.
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