Description
The Collet Spanner UM ER40 is a collet spanner made to fit ER40 UM collet nuts. It is made from high-strength alloy steel with a corrosion-resistant coating, and its precise fit grips the nut securely without slipping, for controlled tightening and easy loosening during tool changes.
Tips
- Use the spanner on the nut and hold the chuck or spindle steady while tightening.
- Tighten firmly but don’t over-tighten: excessive torque can damage the collet and nut.
Buy ER40 accessories in South Africa
See all ER40 collets, nuts and spanners and our full ER collet range. Stocked items are dispatched within 24 hours, with 1–3 working day delivery nationwide.






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