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- Type 27 SG Depressed Center Grinding Wheel
- 9 in Diameter
- 30 Grit
| Hardness Grade | S |
| RPM [Max] | 8600 rpm |
| Tool Shape | Type 27 |
| Abrasive Material | Aluminum Oxide |
| Arbor Diameter | 7/8 in |
| Dia. | 9 in |
| Type of Abrasive | Bonded |
| Grit | 30 |
| Abrasive Trade Name | ZA |
| Thickness | 0.25 in |
| Weight | 16.2 LB |
