3M 7010309308 Finishing Flap Brush 8x3x3 in 7S Super Fine

Product Description

The 3M 7010309308 is a finishing flap brush designed for light-duty cleaning and finishing applications across industrial and trade work surfaces. Individual abrasive sheets are adhered at a 90-degree angle to a central core, creating a flap-style configuration that delivers consistent surface contact. The brush uses a super fine grade silicon carbide abrasive mineral and carries a hard 7S density rating, which provides long service life while limiting conformability to irregular surfaces. At 8 inches long by 3 inches in diameter with a 3-inch arbor hole, this brush fits standard bench grinders and pedestal units used in metal finishing and surface prep workflows.

This flap brush suits light cleaning, deburring, and surface finishing tasks on metal, composites, and similar materials. The hard density and super fine silicon carbide make it well-suited for final-stage finishing passes where minimal material removal is needed and surface condition is the primary goal. It is commonly used by fabricators, maintenance technicians, and metalworking tradespeople in shop environments requiring controlled, consistent finishing results.

Key Features

• Super fine grade silicon carbide abrasive mineral for light finishing and cleaning
• Hard 7S density rating for extended service life and low surface conformability
• Individual sheets adhered at 90 degrees to core for uniform flap action
• 8 inches x 3 inches x 3 inches overall dimensions for use on standard bench and pedestal grinders
• Sold individually — one brush per unit

Compatibility

Designed as an OEM-style replacement or direct-fit finishing flap brush for standard bench grinders and pedestal grinding units accepting an 8-inch diameter, 3-inch face-width brush with a 3-inch arbor.

Installation Notes

Installation should be performed by a qualified technician familiar with bench grinder tooling and rotating abrasive equipment. Power down and lock out the grinder before mounting or removing the brush. Confirm the spindle speed rating of the grinder does not exceed the rated RPM of the brush before operation. Inspect the flap brush for damage prior to each use and do not operate a damaged or unbalanced brush.

Technical Specifications

• Abrasive Mineral: Silicon Carbide
• Grade: Super Fine
• Density: 7S (Hard)
• Dimensions: 8 inches x 3 inches x 3 inches
• Weight: 1.97 pounds
• UPC: 00048011153315
• Sold As: Each

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7010309308