3M 7100138324 Ceramic Tapered Disc Brush 80 Grit 3 in

Product Description

The 3M 7100138324 is a ceramic radial bristle disc brush designed for deburring, blending, and surface finishing on metal and other hard materials. Running at up to 20,000 RPM, this medium-grade brush delivers consistent, aggressive cutting action through its ceramic abrasive construction. The tapered disc profile concentrates bristle contact on the work surface, making it well suited for edge work and contour finishing. It accepts a 3/8-inch arbor hole and features a plain hole connector for straightforward mounting on compatible rotary tools and right-angle grinders.

This brush is used in metalworking, fabrication, and maintenance applications where controlled surface conditioning is required. The 80 grit, medium-grade ceramic abrasive is appropriate for moderate stock removal, weld blending, and cleaning scale or oxidation from ferrous and non-ferrous metals. Its compact 3-inch outside diameter makes it practical for working in tight areas or along part edges where larger wheels cannot reach. Each package contains one brush unit.

Key Features

• Ceramic abrasive construction for consistent cut rate and long service life
• 80 grit medium grade for moderate stock removal and surface blending
• 3-inch outside diameter with tapered disc profile for edge and contour work
• Maximum rated speed of 20,000 RPM
• 3/8-inch arbor hole with plain hole connector for quick mounting
• 1-inch trim length provides controlled bristle flex during use

Compatibility

Designed for use with rotary tools, die grinders, and right-angle grinders fitted with a 3/8-inch arbor. Verify that the tool's rated speed does not exceed the brush's 20,000 RPM maximum before mounting.

Installation Notes

Installation should be performed by a qualified operator familiar with abrasive tool safety. Power down and disconnect the tool from its energy source before mounting or removing the brush. Confirm the arbor size and tool RPM rating are within specification before operation. Always wear appropriate eye protection and follow applicable ANSI B11 or employer safety standards when using rotary abrasive accessories.