3M 7000021284 Radial Bristle Brush 400 Grit Ceramic

Product Description

The 3M 7000021284 is a radial bristle brush designed for surface finishing, deburring, blending, and light material removal on metal and other hard substrates. Built with ceramic abrasive bristles rated at 400 grit, this brush delivers a super fine finish suitable for precision work on welds, edges, and contoured surfaces. At 6 inches in outside diameter and 7/16 inch in thickness, it mounts via a plain arbor connection to a 1-inch arbor hole. The ceramic abrasive construction provides consistent cut rate and extended service life under repeated use. Licensed technicians and fabricators working in metal finishing, maintenance, and repair operations will find this brush fits standard bench and pedestal grinder setups.

This radial bristle brush is suited for bench grinder and pedestal grinder applications in metal fabrication shops, maintenance facilities, and industrial service environments. It is appropriate for finishing stainless steel, carbon steel, aluminum, and similar hard materials where a super fine, controlled surface finish is required. The 6-inch diameter and plain arbor mounting make it a straightforward replacement for worn radial bristle brushes in existing setups.

Key Features

• Ceramic abrasive bristles rated at 400 grit for super fine surface finishing
• 6-inch outside diameter fits standard bench and pedestal grinder configurations
• 7/16-inch brush thickness for consistent contact across contoured and flat surfaces
• Plain arbor connection with 1-inch arbor hole for direct mounting
• Blue bristle color for easy grit identification in multi-brush shop environments
• Maximum operating speed of 6,000 RPM

Compatibility

Designed for use with bench grinders and pedestal grinders accepting a 1-inch plain arbor and accommodating a 6-inch accessory diameter. Verify machine arbor size and maximum accessory RPM rating before installation.

Installation Notes

Installation should be performed by qualified personnel familiar with abrasive wheel and brush mounting procedures. Disconnect and lock out power to the grinder before mounting or removing the brush. Confirm that the grinder's rated maximum accessory speed meets or exceeds the brush's 6,000 RPM maximum operating speed before use. Always install and use appropriate guards per applicable ANSI and machine manufacturer requirements.