Custom shaft collars sized by bore. A ring that clamps onto a shaft to locate a bearing, sprocket, or sheave.
Pick a bore size below to load a collar into the configurator. Each one comes with the OD, width, and cup-point set screw already sized to its bore, and a slip fit to the shaft. You stay in control of the bore, width, material (1215 default; 303 stainless, 1045, or 4140), and the set screw, and you can add a second screw or a keyway. Slide it on, line it up, and tighten against the shaft. Send us your measured shaft size and we confirm the bore before cutting.
Collars by bore size
Custom set-screw shaft collars, sized by bore. A ring that clamps onto a shaft to locate a bearing, sprocket, or sheave. Each card loads a collar with the OD, width, and cup-point set screw sized to its bore, into the configurator as an editable starting point. Machined from 1215, 303 stainless, 1045, or 4140. Click a bore size to begin.
By the bore, the diameter of the shaft it clamps onto. Pick the card that matches your shaft and the collar loads with the bore, OD, width, and set screw already sized to it. Slide it on, line it up, and tighten the set screw against the shaft. Every dimension stays editable in the configurator.
A cup-point socket set screw (ANSI B18.3) threaded radially through the collar wall, bearing on the shaft. A 1" bore collar uses a 3/8-16 screw, smaller bores step down to 5/16-18 and 1/4-20. For higher holding power, a flat or a shallow spot drilled on the shaft under the screw helps; you can add a second set screw at 90 degrees in the configurator.
Set-screw collars are the simplest and lowest-cost way to lock a part to a shaft, and they are what these cards build. The screw bites the shaft, leaving a small witness mark, and holds well for locating and light-duty work. Clamp and two-piece collars grip the full bore without marring and hold better against reversing loads, so they are worth considering if you cannot mark the shaft or the load reverses often. For most locating jobs the set-screw collar is the right tool.
The cards default to 1215 free-machining steel. Switch to 303 stainless for washdown service, or 1045 / 4140 for higher clamp duty, in the configurator. Material certs (MTRs) are available on request.
Yes, that is the point of building them to order. Set any bore in the configurator, with a slip fit to your measured shaft, plus the keyway or second set screw if you need it. We confirm the bore against your shaft before cutting.
