Approx. Weights
Abrasive Conversions
Grade Markings
Wheel Speed Chart
Anatomy of a Wheel
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| Abrasive |
Grit Size | Combination | Grade | Structure | Bond | Reinforcing Cloth | |
| SA | Friable (white) |
12 14 16 20 24 30 36 46 60 80 100 |
Nominal .1 .2 .4 .5 |
Soft |
Dense 1 2 3 4 5 6 7 8 Open 9 10 11 12 13 |
ResinB B7 B9 B11 B12 B15 Vitrified V VA Rubber R25 R50 |
F external cloth |
| P | Friable (pink) |
F2B-2 internal cloth | |||||
| A | Regular Aluminum Oxide |
F1-1 internal cloth | |||||
| AM | Semi Friable (Combination) |
F1H-1 internal plus 2 hub cloth | |||||
| MA | Semi Friable (Combination) |
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| T | Treated Aluminum Oxide |
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| TA | Treated (Combination) |
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| D | Aluminum Oxide |
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| C | Silicon Carbide |
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| CA | Silicon Carbide (Combination) |
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| Z | Zirconia |
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| ZA | Zirconia (Combination) |
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| N | Norzon |
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| NA | Norzon (Combination) | ||||||
| AN | Norzon (Combination) |
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| NC | Norzon (Combination) |
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| CN | Norzon (Combination) |
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| NT | Norzon (Combination) |
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| NTS | Norzon (Combination) |
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| TN | Norzon (Combination) |
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| B | Cubitron |
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