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Small aluminum Oldham coupling hub with set screw, one-inch diameter, 1.125-inch length, 3/8-inch bore

Ruland Manufacturing

Ruland Manufacturing OST16-6-A Oldham Coupling 3/8 in Bore

SKU CH-71PH-KTN5A

Oldham coupling with 3/8 in bore handles 0.5° angular and 0.008 in parallel misalignment at up to 4,500 RPM

  • Precise alignment with 0.5 degree angular tolerance
  • Smooth operation up to 4,500 RPM maximum speed
  • Compact 1 in diameter fits tight spaces
  • Lightweight aluminum hubs reduce rotating mass
  • Secure set-screw locking on 3/8 in round bore

Oldham Coupling 3/8 in Bore

This Oldham coupling connects two shafts with a 3/8 in round bore using set-screw locking. It suits motion-control systems that must tolerate parallel and angular misalignment while transmitting torque at moderate speeds.

Thermals Noise Power

The coupling operates mechanically without electrical power draw, active cooling or audible noise. It is rated for a maximum speed of 4,500 RPM and handles axial motion of 0.004 in within its aluminium hubs.

Set-Screw Hubs and Misalignment Allowance

Set screws on each hub secure the shafts without a keyway, simplifying installation. The design accommodates 0.5 degrees of angular misalignment and 0.008 in of parallel offset, reducing load on connected bearings.

Highlights

  • Precise alignment with 0.5 degree angular tolerance
  • Smooth operation up to 4,500 RPM maximum speed
  • Compact 1 in diameter fits tight spaces
  • Lightweight aluminum hubs reduce rotating mass
  • Secure set-screw locking on 3/8 in round bore

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the Ruland OST16-6-A Oldham coupling on a 3/8 in shaft, and what step is often missed?

Slide each aluminium hub onto the shaft to the 0.39 in length-through-bore, then tighten the set screws; the step often missed is checking that parallel offset stays within 0.008 in and angular misalignment within 0.5 degrees after locking.

What maintenance or replacement will this coupling need over time?

Inspect the centre disc for wear whenever shafts are realigned; replace the disc if parallel misalignment exceeds 0.008 in or axial play grows beyond 0.004 in, as the aluminium hubs themselves rarely wear.

What is the first limit reached under sustained high-speed operation?

The 4,500 RPM maximum speed rating is the primary limit; exceeding it risks hub distortion and accelerated disc wear before any other parameter is breached.

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