How to Specify Cut-Off Wheels for Stainless Steel
Most stainless cutting problems come down to contamination rather than abrasive performance. When a wheel contains free iron, that iron transfers to the cut face and starts to rust within days, long after the part has shipped.
Check for iron and sulphur free marking
Wheels intended for stainless carry an INOX or iron-free and sulphur-free marking. Sulphur is used as a filler in general purpose bonds and it is the second common source of staining.
- INOX / iron-free marking on the blotter
- Sulphur-free bond formulation
- Batch burst test report to EN 12413
Match thickness to the job
Thin wheels cut faster and cooler but deflect more. As a rule: 1.0 mm for tube and thin sheet, 1.2 mm for general profile, 1.6 mm when the operator needs a straight cut without a guided tool.
Confirm the speed rating
The wheel must be rated above the free speed of the tool it goes on. A 115 mm wheel on a 13,300 rpm grinder needs a matching rating — never rely on the tool being throttled.