3M
3M 55959 Depressed Center Wheel Type 27 7 in .25 in 5/8-11
A 7-inch Type 27 ceramic grinding wheel with a 5/8-11 threaded arbor for angle grinders, rated to 8,500 RPM and built for steel
- TypeSanders
- Weight1.06
- Type 27 depressed centre for aggressive grinding on steel
- Ceramic abrasive cuts faster and lasts longer on tool steel
- 5/8-11 threaded hub mounts directly on angle grinders
- 8,500 RPM maximum speed matches high-output grinders
- Extra-coarse 36 grit removes heavy stock in fewer passes
3M Green Corps 7 in Type 27 wheel
The 3M 55959 is a depressed-center grinding wheel built for angle grinders. Its 7 in diameter and 0.25 in thickness suit heavy stock removal on steel and tool steel. The ceramic abrasive runs at up to 8,500 RPM with a 5/8-11 threaded hole.
Replaces worn Type 27 wheels on steelwork
Swap it in when the current wheel has lost its edge or when the job calls for the extra-coarse 36 grit Green Corps blend. The ceramic grain keeps cutting longer than conventional aluminum-oxide wheels, so the change pays off on high-volume grinding tasks.
Check grinder speed and arbor fit
Verify the tool’s no-load RPM does not exceed 8,500 and that it accepts a 5/8-11 threaded arbor. Confirm the guard is rated for a 7 in Type 27 wheel and that the workpiece is steel or tool steel, the only materials specified.
Highlights
- Type 27 depressed centre for aggressive grinding on steel
- Ceramic abrasive cuts faster and lasts longer on tool steel
- 5/8-11 threaded hub mounts directly on angle grinders
- 8,500 RPM maximum speed matches high-output grinders
- Extra-coarse 36 grit removes heavy stock in fewer passes
Specifications
| Type | Sanders |
|---|---|
| Weight | 1.06 |
| Brand | 3M |
| Model | 55959 |
Questions about this item
Will the 5/8"-11 threaded hole fit my angle grinder spindle?
The wheel uses a 5/8"-11 threaded hole that matches standard angle-grinder spindles of the same size.
What is the correct way to mount this Type 27 wheel so it runs true?
Thread the wheel onto the spindle by hand, then tighten with the grinder's lock-nut wrench while holding the spindle lock; do not overtighten.
How will I know when this 36-grit ceramic wheel needs replacing?
Replace the wheel when the abrasive surface wears down to the backing or when vibration increases during grinding.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.
