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Grinding Wheel Designation
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Arbor Hole Size
For Use With
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Arbor Hole Thread Size
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Backup Pads Required
Abrasive Material
U.S.–Mexico–Canada Agreement (USMCA) Qualifying
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Easy-Use Grinding Wheels for Angle Grinders—Use on Metals
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The saucer shape lets you hold these wheels at shallower angles than Type 27 wheels, so they’re more comfortable to handle. They are also known as Type 28 wheels and raised-hub wheels.
Wheels are aluminum oxide, which is the most common abrasive used in grinding metal.
Caution: Use only accessories that have a greater rpm rating than the maximum speed of the grinder you choose.
Wheel | Each | Package | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dia. | Thk. | Arbor Hole Size | Arbor Hole Thread Size | Max. Rotation Speed, rpm | Abrasive Material | Abrasive Bond Material | Designation | Shape | Backup Pads Req. | Color | Grit (Surface Texture) | Each | Pkg. Qty. | Pkg. | ||||
For Steel, Stainless Steel, Aluminum, and Brass | ||||||||||||||||||
Unthreaded Arbor Hole | ||||||||||||||||||
| 4 1/2" | 1/4" | 7/8" | — | 13,300 | Aluminum Oxide | Synthetic Resin | Type 28 | Raised Hub | No | Black | 24 (Rough) | 4477A4 | 00000 | 25 | 4477A411 | 0000000 | ||
| 7" | 1/4" | 7/8" | — | 8,600 | Aluminum Oxide | Synthetic Resin | Type 28 | Raised Hub | No | Black | 24 (Rough) | 4477A1 | 00000 | 20 | 4477A113 | 000000 | ||
| 9" | 1/4" | 7/8" | — | 6,600 | Aluminum Oxide | Synthetic Resin | Type 28 | Raised Hub | No | Black | 24 (Rough) | 4477A2 | 00000 | 20 | 4477A212 | 000000 | ||
Threaded Arbor Hole | ||||||||||||||||||
| 4 1/2" | 1/4" | — | 5/8"-11 | 13,300 | Aluminum Oxide | Synthetic Resin | Type 28 | Raised Hub | No | Black | 24 (Rough) | 4477A3 | 0000 | 10 | 4477A311 | 00000 | ||
| 7" | 1/4" | — | 5/8"-11 | 8,600 | Aluminum Oxide | Synthetic Resin | Type 28 | Raised Hub | No | Black | 24 (Rough) | 4477A11 | 00000 | 10 | 4477A112 | 000000 | ||
| 9" | 1/4" | — | 5/8"-11 | 6,600 | Aluminum Oxide | Synthetic Resin | Type 28 | Raised Hub | No | Black | 24 (Rough) | 4477A12 | 00000 | 10 | 4477A121 | 000000 | ||
