3M 7100138325 Scotch-brite Bristle Disc 3 Inch 50 Grit

Product Description

The 3M 7100138325 Scotch-Brite Radial Bristle Disc is a ceramic abrasive disc designed for surface preparation, coating removal, and finishing on metal and other materials. Molded, abrasive-filled flexible bristles replace wire brushes in applications including rust removal, weld burn cleanup, paint and adhesive stripping, oxide removal, and general surface conditioning. The proprietary ceramic abrasive grain delivers aggressive cutting action while maintaining consistent finish quality from first use through the end of the disc's service life. At 3 inches in diameter with a 50 grit rating, this disc suits both detailed work and broader surface areas on complex or contoured parts.

This disc is used in metal fabrication, welding finishing, industrial maintenance, and surface prep workflows. Its curved, flexible bristle design conforms to irregular and contoured surfaces, making it practical in applications where a rigid abrasive tool would lose contact. It is appropriate for use in shop environments by welders, machinists, maintenance technicians, and trade professionals who need consistent results on surface conditioning tasks. The disc contains no wire filaments, reducing the hazard of wire fragment ejection during operation.

Key Features

• Ceramic abrasive grain delivers aggressive cutting and consistent finish throughout the disc life
• Flexible molded bristles conform to contoured and complex part geometries
• Removes paint, rust, adhesives, weld burns, heavy oxides, and surface contaminants
• No wire filaments, reducing risk of wire fragment ejection compared to wire brushes
• Bristle spacing optimized for high-loading removal tasks such as coating and adhesive stripping
• Requires less applied pressure than wire brushes to achieve effective material removal

Compatibility

Designed for use with angle grinders and rotary tools that accept 3 inch radial bristle discs with the appropriate arbor configuration. Confirm spindle speed rating and arbor compatibility before installation.

Installation Notes

Installation and operation should be performed by personnel familiar with rotary abrasive tool safety practices. Disconnect and de-energize the tool before mounting or removing the disc. Verify that the tool's maximum RPM rating meets or exceeds the disc's rated speed before use. Eye protection and appropriate PPE are required during operation, as with all abrasive disc applications.

Technical Specifications

• Disc Diameter: 3 inches
• Grit: 50
• Abrasive Material: Ceramic
• Disc Profile: Curved
• Package Weight: 1.25 pounds
• Package Length: 6.9 inches
• Package Width: 3.6 inches
• Package Height: 4.2 inches
• Unit of Measure: Box
• Minimum Order Quantity: 4

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100138325