How to find the right Set-Screw Shaft Collars AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Set-Screw Shaft Collars
- Shaft hardness
- Use only on shafts softer than the set screw point. Do not use on hardened or precision ground shafts. The cup point must bite into the shaft to hold.
- Shaft surface damage
- Expect a raised burr under the screw, and plan for it if the collar or other parts will later slide off the shaft. The burr can jam parts during disassembly.
- Flat on the shaft
- Machine a small flat under the screw where possible. A flat improves holding and keeps the burr out of the sliding path.
- Screw count and material
- Prefer steel collars with steel screws for load, and stainless for corrosion resistance. The screws do all the holding, so screw material and engagement limit capacity.
- Bore fit
- Match the nominal shaft size in the same unit system. Too much clearance cocks the collar off-axis when the screw is tightened.
Brands that matter
- Climax Metal Products: Large range of set-screw collars in steel and stainless.
- Boston Gear: Supplies standard set-screw collars.
- Stafford Manufacturing: Offers set-screw collars alongside clamp styles.
- Ruland: Also lists set-screw collars, though better known for clamp styles.
What to avoid
- Use on hardened, chrome-plated or linear-motion shafts
- Collars that use plain flat-point screws when cup-point is expected
- Reusing worn or rounded set screws
Questions
Why does my set-screw collar slip?
The screw may not be biting because the shaft is too hard or the screw is under-tightened. Switching to a clamp collar or adding a flat usually solves it.