Rotary Tool Accessories

Grinding Stones and Mounted Abrasives

The working end has to reach the surface without crowding the surrounding edges. Compare profile and head dimensions after confirming the abrasive and material pairing.

What to check before buying

Use the model number to identify the abrasive and the intended workpiece materials. A broad head covers a different contact area than a narrow point. For an inside corner or a small burr, check both the head width and the amount of usable space around the holder. Keep the head diameter separate from the tool-side shank measurement.

Start with the abrasive family

Use the exact manufacturer material list to distinguish aluminum oxide and silicon carbide models. A similar shape or color does not establish how the abrasive is meant to be used.

Compare the part that contacts the work

The broad 85422 and the narrower 84922 show how two stones in the same family suit different clearances. Compare the mounted head and its shoulder against the whole opening.

Compare these accessories

Manufacturer references

Questions about this department

Can I identify the abrasive by color?

Look for the named abrasive in the manufacturer’s product information. Listing colors can shift with lighting, and shape or color alone does not establish the material guidance.

What should I measure if the stone must reach a recess?

Check the recess opening and depth, then compare the working head and its shoulder to that space. Confirm separately that the shank fits the approved holder.

Buying guides