A cylindrical part rotates while a wheel grinds along its length.
Standard Dimensions:
| Inches | mm | Inches | mm | Inches | mm |
| 12 | 305 | 1 | 1-1/2 | 2 | 25.4 | 38 | 51 | 3 | 4 | 5 | 76 | 101.6 | 127 |
| 14 | 356 | 1 | 1-1/2 | 2 | 3 | 25.4 | 38 | 51 | 76 | 3 | 4 | 5 | 76 | 101.6 | 127 |
| 16 | 406 | 1 | 1-1/2 | 2 | 3 | 25.4 | 38 | 51 | 76 | 5 | 8 | 127 | 203.2 |
| 18 | 455 | 1 | 1-1/2 | 2 | 3 | 25.4 | 38 | 51 | 76 | 5 | 8 | 127 | 203.2 |
| 20 | 508 | 1 | 1-1/2 | 2 | 3 | 4 | 25.4 | 38 | 51 | 76 | 102 | 5 | 8 | 12 | 127 | 203.2 | 304.8 |
Recommended Specifications: | General Purpose | SA60K7V | SA | Semi-friable aluminium oxide |
| Steel < 55Hrc | PA60M7V | WAG | Highly friable grain |
| Steel > 55Hrc | SA60K7V | PA | Tough but friable aluminium oxide |
| Stainless Steel (soft) 300 series | SA60M7V | GC | For non-ferrous metals |
| Stainless Steel (hard) 400 series | SA60K7V | | |
| Nickel Alloys | WAG80H8V | | |
| HSS & tool steel | SA60K7V | | |