Oldham Coupling 32mm
Oldham coupling, 32mm outer diameter, aluminium alloy hubs with a Delrin/Teflon floating disc.
Overview
The TOHC-32 is an Oldham coupling, 32mm outer diameter, for connecting two shafts that aren't perfectly aligned - typically a motor shaft to a leadscrew or ballscrew.
An Oldham coupling works through a floating centre disc with a tongue on each face, set at 90 degrees to each other, sliding in matching slots in the two aluminium alloy hubs. That sliding action absorbs small amounts of parallel and angular misalignment between the shafts without transmitting side-loads into the motor bearing, which a rigid coupling would. The disc itself is Delrin/Teflon, a low-friction plastic that lets it slide freely in the slots.
This design is backlash-free by nature - there's no gear mesh or set-screw play to take up, which matters directly for positioning accuracy on a stepper or servo axis. The aluminium hubs keep added rotating mass low, relevant on a stepper motor where extra inertia at the shaft slows acceleration response.
Bore size on each hub is matched to the specific motor and leadscrew shafts being connected - confirm both bore diameters fit before ordering.
For a smaller or larger shaft pairing, the TOHC-25 and the TOHC-43/TOHC-53 in this range bracket it in outer diameter.
Supplied by Tiny Controls in India.
Specifications
| Coupling size | 32 mm |
|---|
Questions
Is the bore a standard size, or does it need matching to my specific shafts?
It's matched to the specific motor and leadscrew shafts being connected — confirm both bore diameters fit before ordering, not a fixed standard size.
How does this actually absorb misalignment between two shafts?
A floating center disc with a tongue on each face, set 90 degrees apart, slides in matching slots in the two hubs — that sliding action takes up small parallel and angular misalignment without transmitting side-loads into the motor bearing, unlike a rigid coupling.
Where does 32mm sit in your Oldham coupling range?
In the middle — the TOHC-25 is smaller, the TOHC-43 and TOHC-53 are larger.
Any backlash to worry about with this design?
None — backlash-free by design, no gear mesh or set-screw play to take up.
What are the hubs and disc actually made of?
Aluminum alloy hubs (keeps rotating mass low) with a Delrin/Teflon floating disc (low friction, slides freely).