Dewalt DW8904COMBO Type 27 Grinding Wheel 4.5 in 46 Grit

Product Description

The DEWALT DW8904COMBO is a Type 27 depressed-center grinding wheel designed for use with 4.5-inch angle grinders. Constructed from zirconia alumina abrasive bonded with a resinoid bond, this wheel delivers aggressive stock removal at a coarse 46 grit rating. The depressed-center (Type 27) profile allows flush and flat grinding on workpieces where a standard raised-hub wheel would be obstructed. At a maximum operating speed of 8,500 RPM, it suits most standard 4.5-inch right-angle grinder spindles. Licensed tradespeople and fabricators in HVAC, plumbing, and general metalwork reach for this wheel when cutting prep, weld cleanup, or surface conditioning on steel and stainless stock is required.

This wheel fits standard 4.5-inch angle grinders with a 7/8-inch arbor hole. The Type 27 geometry is the correct choice for surface and bevel grinding applications where the wheel face contacts the workpiece at a low angle. It is well suited to sheet metal work, structural steel fabrication, pipe fitting, and ductwork preparation common in mechanical contracting environments. The coarse 46-grit zirconia alumina construction is optimized for fast, aggressive material removal rather than finishing work.

Key Features

• Zirconia alumina abrasive provides fast cut rate and extended wheel life on ferrous metals
• Type 27 depressed-center profile allows flush grinding on flat and contoured surfaces
• Resinoid bond construction for consistent grain exposure and controlled wear
• 46 grit coarse grade for aggressive stock removal and weld bead cleanup
• 8,500 RPM maximum rated speed compatible with standard 4.5-inch angle grinders
• 7/8-inch arbor hole fits most common grinder spindle configurations

Compatibility

Designed as a direct-fit replacement wheel for 4.5-inch Type 27 angle grinders with a standard 7/8-inch arbor. Consult the grinder manufacturer RPM rating before mounting to confirm the tool does not exceed 8,500 RPM.

Installation Notes

Installation must be performed by a qualified operator following ANSI B7.1 safety requirements for the use, care, and protection of abrasive wheels. Disconnect and de-energize the grinder before mounting or removing any wheel. Inspect the wheel for cracks or damage before each use and never operate above the rated maximum RPM. Always use the guard supplied with the grinder and wear appropriate PPE including eye and face protection.