Dewalt DWA8908F Type 27 Grinding Wheel 4.5in 24 Grit

Product Description

The DEWALT DWA8908F is a Type 27 depressed center grinding wheel built for aggressive stock removal on metal surfaces. It measures 4.5 inches in diameter and 0.25 inches thick, with a 7/8-inch arbor hole for standard angle grinder compatibility. The ceramic abrasive grain at 24 grit cuts fast and runs cool, making it well suited for heavy grinding passes where material removal rate matters. A resinoid bond holds the ceramic grain under load, and the reinforced fiberglass construction supports safe operation up to 13,300 RPM. The wheel weighs 0.42 pounds and ships individually.

This wheel is used by welders, fabricators, ironworkers, and HVAC sheet metal mechanics for weld grinding, surface prep, and edge cleanup on steel, stainless, and other hard metals. The Type 27 depressed-center profile keeps the grinding face off the workpiece and allows for a low angle of attack, which is the standard configuration for flat surface and weld bead grinding with a 4.5-inch right-angle grinder. The 24-grit ceramic grain suits initial passes and fast stock removal rather than finishing work.

Key Features

• 24-grit ceramic abrasive for fast, aggressive grinding action
• Type 27 depressed center profile for low-angle flat and weld grinding
• 13,300 RPM maximum rated speed for 4.5-inch angle grinders
• 7/8-inch arbor hole fits standard right-angle grinder spindles
• Resinoid bond with reinforced fiberglass construction for durability under load
• Hardness code R for consistent performance across the wheel life

Compatibility

Designed as an OEM-style replacement or direct-fit grinding wheel for 4.5-inch right-angle grinders accepting a 7/8-inch arbor and rated to 13,300 RPM or higher.

Installation Notes

Grinding wheels must be installed by qualified personnel following ANSI B7.1 safety standards and the grinder manufacturer guidelines. Always inspect the wheel for cracks or chips before mounting and confirm the grinder spindle RPM rating meets or exceeds 13,300 RPM before use. Power down and unplug or lock out the grinder before changing wheels. Use the correct flange and arbor nut torque per the grinder manufacturer specification, and always run a new wheel for at least 60 seconds at full speed in a guarded area before contact grinding.