3M 7100141055 Depressed Grinding Wheel Type 27 Type 42

Product Description

The 3M 7100141055 is a depressed center grinding wheel designed for aggressive material removal on metals, welds, and hard surfaces. It carries a Type 27 and Type 42 profile, making it compatible with standard right-angle grinders. The wheel measures 4.5 inches in diameter and 0.09375 inches thick, with a 0.875-inch arbor hole. Its ceramic abrasive grain delivers an extra coarse cut, and the resinoid bond holds the grain firmly under high-load grinding. Maximum rated speed is 13,300 RPM. Licensed trades and metal fabricators rely on this wheel for weld grinding, surface conditioning, and stock removal on ferrous and non-ferrous workpieces.

This wheel is suited for use in metal fabrication shops, industrial maintenance, and field welding applications. The Type 27 depressed-center design keeps the grinding surface at a low angle to the workpiece, which is preferred for flat surface work and weld flush grinding. The Type 42 geometry also allows conical-profile use where edge access is needed. Installation on standard 4.5-inch right-angle grinders with a 7/8-inch arbor is straightforward, and the black resinoid wheel body provides visual wear indication during use.

Key Features

• Ceramic abrasive grain provides aggressive, fast stock removal on hard metals
• Extra coarse grade for heavy grinding and weld removal applications
• Rated to 13,300 RPM for use with standard right-angle grinders
• Type 27 and Type 42 dual-profile compatibility in a single wheel
• Resinoid bond maintains grain retention under sustained grinding pressure
• 7/8-inch arbor hole fits the most common grinder spindle standard

Compatibility

Designed for use with 4.5-inch right-angle grinders accepting a 7/8-inch arbor, conforming to Type 27 and Type 42 wheel mount specifications.

Installation Notes

Installation should be performed by a qualified operator following ANSI B7.1 safety standards for the use, care, and protection of abrasive wheels. Always power down and disconnect the grinder before mounting or removing the wheel. Verify the grinder spindle speed does not exceed the 13,300 RPM rating marked on the wheel before starting. Inspect the wheel for cracks or chips before each use and do not use a damaged wheel.