Motor shaft does not fit your gearbox? Gearbox output does not match your joint or housing? Tell us both sizes and we machine the coupling or adapter flange that joins them, bored to each side.
Pick the case that looks like yours. Each coupling is made to your two sizes, so it does not matter whether the parts came from us.
Your servo or stepper shaft does not fit the gearbox input.
We make: A coupling bored to the motor shaft on one side and the gearbox input on the other, plus an adapter flange if the mounting faces differ.
Quote this couplingYou drive a joint, wheel or axis directly and the motor shaft does not match its bore.
We make: A coupling or bore adapter that takes the motor shaft into your joint, hub or pulley.
Quote this couplingThe gearbox output shaft or flange does not match the joint, housing or load you connect to.
We make: An output coupling or adapter flange sized to the gearbox output and to your part.
Quote this couplingTwo shafts of different diameter, key type or unit (inch and metric) need to turn together.
We make: A coupling, sleeve or bush with a different bore on each side: smooth, keyed, D-cut or clamped.
Quote this couplingThe most common mismatches we solve. Sizes are examples; we work to yours.
| Example | The mismatch | What we make |
|---|---|---|
| Motor shaft Ø14 mm, gearbox input Ø19 mm | Different shaft diameters (OD) | Coupling bored 14 mm on one side and 19 mm on the other |
| Motor shaft Ø8 mm, joint or pulley bore Ø12 mm | Shaft smaller than the bore (ID) | Bore adapter sleeve or bush, or a coupling to your hub |
| Stepper shaft 6.35 mm (¼ in), gearbox Ø8 mm | Inch shaft to metric bore | Inch-to-metric coupling |
| Keyed motor shaft, smooth gearbox shaft | Different shaft types | Keyway on one side, clamping bore on the other; D-cut and spline too |
| Motor pilot Ø50 mm, gearbox input face for Ø70 mm | Mounting face does not match | Adapter flange with your pilot and bolt circle on each face |
| Gearbox output flange PCD 58 mm, joint PCD 80 mm | Output does not match the joint or housing | Output adapter flange or coupling |
| Shafts too far apart or too close | Axial gap or overlap | Coupling or spacer made to the length you need |
A motor model number or a drawing is often enough. If you measure, these six sizes cover a coupling and an adapter flange. Measure the other part (gearbox, joint or housing) the same way; for a bore, give its inner diameter and depth.
One-piece couplings with a different bore on each side: clamping, keyed, D-cut or splined, in metric or inch sizes. Motor to gearbox, motor to joint, gearbox to load.
Adapter plates with pilot, bolt circle and bolt holes machined to your servo or stepper on one face and the gearbox or housing on the other.
Output flanges, shafts and hollow-bore adapters so a gearbox bolts straight to your robot joint, pulley, pinion or wheel hub.
Foot mounts, joint housings and motor brackets in aluminium or steel, made to your drawing.
Enter the two sizes and watch the coupling drawing update. Add a drawing or motor model if you have one.
Use a coupling with a different bore on each side. We machine the coupling to your motor shaft diameter on one side and the gearbox input shaft or bore on the other, for example 14 mm to 19 mm, with a clamp, key or D-cut to suit each shaft.
Yes. Send the motor shaft size and the bore, hub or flange of the joint or housing, or a drawing of both. We make the coupling or adapter that joins them.
Yes. We make output couplings and adapter flanges that match the gearbox output shaft or flange on one side and your part on the other.
For each shaft: the diameter, the usable length and the type (smooth, keyed with key width, D-cut, spline). For a bore: its inner diameter and depth. For a mounting face: the pilot diameter, bolt circle (PCD) and bolt size. A motor model number or a PDF/STEP drawing is often enough.
Yes. Couplings can be bored to inch shafts such as 1/4 in (6.35 mm) on one side and metric sizes such as 8 mm on the other.
Yes. There is no minimum order quantity. We make single couplings and flanges for prototypes and batch quantities for production.
PDF, DWG, DXF, STEP/STP, IGES, Parasolid (X_T), SolidWorks part files, ZIP archives and photos (JPG, PNG, WEBP), up to 25 MB each. Files are stored privately.
