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Oldham Coupling 53mm

Oldham coupling, 53mm outer diameter, aluminium alloy hubs with a Delrin/Teflon floating disc.

Coupling size
53 mm

Overview

The TOHC-53 is an Oldham coupling, 53mm outer diameter, the largest in this range, 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. At this size the coupling suits a larger motor frame and thicker shafts than the rest of this range, typically NEMA 34 territory.

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 shaft pairing, the TOHC-25, TOHC-32 and TOHC-43 in this range cover smaller outer diameters.

Supplied by Tiny Controls in India.

Specifications

Coupling size 53 mm

Questions

I'm running a NEMA 34 motor — is this the coupling size I need?

Likely, yes — this size suits a larger motor frame and thicker shafts than the rest of the range, typically NEMA 34 territory. Still confirm your actual bore diameters before ordering.

Is this the biggest Oldham coupling you sell?

Yes — 53mm outer diameter, the largest in this range.

Does the bore come in a standard size, or does it need matching?

Matched to the specific motor and leadscrew shafts being connected — confirm both bore diameters fit before ordering.

Any backlash with this design?

None — backlash-free, no gear mesh or set-screw play to take up.

My motor is smaller than NEMA 34 — is this overkill?

Probably — the TOHC-25, TOHC-32 and TOHC-43 in this range cover smaller shaft pairings.