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The 3M 7100178249 is a 244D series general-purpose flap wheel designed for grinding, polishing, sanding, and finishing metal and similar surfaces. Built with aluminum oxide mineral, the abrasive cuts aggressively, resists wear, and still delivers fine surface finishes. Individual abrasive flaps are mounted around the wheel and continually lap the workpiece as they wear, exposing fresh cutting edges. The X-weight cotton cloth backing is durable enough to resist tearing at edges while remaining malleable enough to reduce gouging and marring. This wheel measures 3 inches in diameter and is sold individually.
This flap wheel is suited for general metal fabrication, maintenance, and finishing tasks where consistent stock removal and surface conditioning are both required. It is compatible with Type 83 (T83) and Type 84 (T84) mandrel mounting systems, making it adaptable to a range of right-angle and die grinders commonly used in fabrication shops, HVAC sheet metal work, and industrial maintenance settings. At 60 grit, it is well positioned for moderate material removal followed by a reasonably smooth finish in a single operation.
Designed for use with Type 83 (T83) and Type 84 (T84) mandrel mounting systems on standard right-angle grinders and die grinders accepting a 3-inch flap wheel.
Flap wheels of this type are installed by qualified trades and fabricators following grinder manufacturer guidelines for maximum RPM and mandrel compatibility. Always confirm the spindle speed rating of the grinder does not exceed the wheel's rated speed before mounting. Disconnect and de-energize the tool before mounting or removing the wheel. Inspect the wheel for damage before each use and replace if flaps show signs of delamination or the backing is compromised.
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