3M 87446 Silver 5in x 1/4in x 5/8-11 T27 Depressed Center Grinding Wheel PK10
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This is a factory-new box of 10 3M Silver Depressed Center Grinding Wheels, PN 87446, Type 27 (T27) quick-change design, measuring 5 in x 1/4 in x 5/8-11 (125 mm x 6 mm x 5/8-11 threaded hub). The abrasive specification is 27 A36 P BF — aluminum oxide grain at 36 grit, P-grade hardness, resin bonded with fiberglass reinforcement — delivering an aggressive stock-removal rate on steel, stainless steel (INOX-rated: Fe <0.1%, S <0.1%, Cl <0.1%), and other metals without contaminating the workpiece. The integrated 5/8-11 quick-change threaded hub eliminates the need for a separate backing nut, enabling fast wheel swaps on any standard 5 in angle grinder with a 5/8-11 spindle. Rated to 12,250 RPM max (80 m/s), certified to EN 12413 and ANSI B7.1; manufactured in Austria with a lot expiration date of 10/2028.
Product Specifications
| Brand | 3M |
| Part Number (MPN) | 87446 |
| Series | 3M Silver |
| Wheel Type | Type 27 (T27) Depressed Center |
| Quantity per Pack | 10 |
| Diameter | 5 in (125 mm) |
| Thickness | 1/4 in (6 mm) |
| Arbor / Hub Thread | 5/8-11 Quick Change (integrated nut) |
| Abrasive Grade Code | 27 A36 P BF |
| Abrasive Material | Aluminum Oxide |
| Grit | 36 |
| Hardness Grade | P |
| Bond Type | Resin Bond w/ Fiberglass Reinforcement (BF) |
| Max RPM | 12,250 RPM |
| Max Surface Speed | 80 m/s |
| Compatible Materials | Steel, Stainless Steel (INOX) |
| Iron Content (Fe) | < 0.1% |
| Sulfur Content (S) | < 0.1% |
| Chlorine Content (Cl) | < 0.1% |
| Safety Standards | EN 12413, ANSI B7.1 |
| Country of Manufacture | Austria |
| Expiration Date | 10/2028 |
| UPC | 051125874465 |