3M 7100138334 Radial Bristle Brush 8x1 Inch 120 Grit

Product Description

The 3M 7100138334 is a radial bristle brush designed for surface preparation, cleaning, and coating removal across metal, wood, and composite materials. It measures 8 inches in diameter by 1 inch in width with a 1.25-inch arbor hole and is rated at 120 grit. The brush uses aluminum oxide and Cubitron abrasive grain bonded into flexible bristle segments that flex under contact, delivering consistent abrasion with minimal applied pressure. The package includes a universal bench motor adapter, making setup straightforward on standard bench grinders and polishing motors. Trade professionals use this brush as a direct replacement for wire brushes where reduced surface aggression is required.

This radial bristle brush suits light to medium surface preparation tasks including weld seam blending, rust and scale removal, paint stripping, and general deburring on ferrous and non-ferrous metals. The flexible bristle design conforms to contoured and irregular surfaces, making it practical for pipe ends, valve bodies, fittings, and fabricated assemblies. It is appropriate for use in HVAC sheet metal fabrication, plumbing, and general mechanical service environments where a safe alternative to rigid wire brushes is preferred.

Key Features

• 120 grit aluminum oxide and Cubitron abrasive grain for consistent material removal
• Flexible bristle construction conforms to contoured and irregular surfaces
• Cleans and preps with minimal applied pressure, reducing surface damage risk
• Suitable replacement for wire brushes in surface cleaning and coating removal applications
• Includes universal bench motor adapter for bench grinder compatibility
• 1.25-inch arbor hole fits standard bench motor spindles

Compatibility

Designed for use on standard bench grinders and polishing motors accepting a 1.25-inch arbor. The included universal bench motor adapter broadens fitment to a range of common bench-mounted drive units.

Installation Notes

Installation should be performed by a qualified technician following the bench grinder or motor manufacturer's mounting instructions. Power down and lock out the bench motor before mounting or removing the brush. Confirm the spindle speed rating of the drive unit does not exceed the maximum rated RPM of the brush before operation. Always wear appropriate eye protection and follow applicable shop safety requirements when operating rotary abrasive tools.

Technical Specifications

• Diameter: 8 inches
• Width: 1 inch
• Arbor Hole: 1.25 inches
• Grit: 120
• Abrasive Mineral: Aluminum Oxide and Cubitron Abrasive Grain
• Weight: 3.9 pounds
• Unit of Measure: Each

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100138334