Replacement Machine Shafts & Shaft Collars

A replacement shaft has to match the bearings, drive components, and retainers that fit onto it. Send a drawing if you have one, or sketch the shaft with dimensions from a single end face and photos of both ends.

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Stepped stainless machine shaft with a milled keyway beside a split shaft collar — Illustrative product image

How to measure a stepped shaft or shaft collar

Record the overall length, each journal diameter, and the position of each shoulder from a common end face. For a keyway, record width, length, depth, and distance from the reference end. Mark any retaining-ring grooves, flats, cross holes, or threads on the sketch.

Where to measure

Reference drawings. Verify dimensions on your part or the manufacturer’s drawing.

Shaft diameters and shoulder locations

Use the same end face for each shoulder location. Measure diameters across the cylindrical surfaces and note any worn bearing seats.

Keyway and shaft collar bore

Measure the keyway between its sidewalls and record its length and position from the shaft end. Measure the collar across its inner bore and record its face-to-face width.

What to include in a shaft quote

Include the material, finish and any fit tolerances from the original drawing. Flag worn bearing seats so we can review the intended size. For a collar, include bore, outside diameter, width, and whether it uses a clamp or set screw. Add the equipment model and quantity.

Request a quote for a shaft made to your drawing or measure the mating bearing or sprocket.

Manufacturer reference MISUMI stepped shaft drawings and machining options