Select an angle-grinder disc using its marked operation and material, then match diameter, arbor, speed and guard to the grinder. OSHA 1926.303 requires abrasive-wheel inspection and ring-testing before mounting in construction work; wheel ratings remain model-specific.
The accessory determines whether an angle grinder cuts, removes material or blends an edge. Pick it from the workpiece and the accessory label, then check that the wheel and guard match the tool.
Match the accessory to the operation
| Accessory and typical job | Check before buying |
|---|---|
| Bonded cut-off wheel for compatible metal or masonry stock | Material rating, wheel thickness, diameter, arbor and cut-off use |
| Grinding wheel or disc for removing weld, burr or surface material | Material rating, wheel profile and grinder orientation |
| Flap disc for blending, deburring and finishing a compatible surface | Grit, backing construction and the finish the job needs |
| Diamond blade for listed masonry, tile or another named material | Exact material, wet or dry rating, segment design and speed |
These are accessory families, not universal permissions. Read the printed specifications; a similar shape does not mean a wheel can do the same job. Use the grinder manual to verify the wheel size, arbor or mounting system, maximum speed and guard. Keep the required guard installed and use only the guard specified for that operation.
Check the wheel and setup
Before mounting, check the wheel for cracks, chips, moisture damage or other defects. OSHA’s construction standard calls for abrasive wheels to be closely inspected and ring-tested before mounting. A wheel must fit the spindle freely; never force it onto the tool. Use the maker’s instructions for the wheel, flange and nut, and tighten only as directed.
OSHA also requires guards for specified portable abrasive-wheel operations, with narrow exceptions in the standard. The rule applies to construction employment; for any job, follow the tool maker’s manual, accessory label and applicable site safety requirements. Use the eye and face protection specified for the material and task. See OSHA’s abrasive wheels and tools standard.
Buy for the cuts you actually make
Check whether the package contains the operation and material you need, how many wheels are included, and whether replacements are available in the same size and rating. For long, straight cuts in sheet goods or lumber, compare the setup in circular saws versus track saws. For drilling and fastener work on the same battery platform, see impact drivers versus drills. Browse power tools.
Common questions
Can I use a grinding disc to cut metal?
Only when the disc maker labels that exact accessory for cutting and the grinder manual permits it. A grinding wheel and a thin cut-off wheel are designed for different operations.
How do I know whether a disc fits my grinder?
Match its diameter, arbor or mounting system, operating speed and approved guard to the tool manual and accessory label. Do not remove a guard to make a wheel fit.
What should I check before mounting an abrasive wheel?
Inspect it for cracks or damage, confirm its markings and fit, and follow the maker's mounting instructions. OSHA's construction standard requires abrasive wheels to be inspected and ring-tested before mounting.
Can one diamond blade cut every material?
No. Diamond blades are labeled for specific materials and wet or dry operation. Check the blade and grinder instructions for the exact work.