3M 7000028339 Quick-change Disc 3 in 36 Grit Ceramic

Product Description

The 3M 7000028339 is a coated abrasive quick-change disc designed for use with Type R (Roloc TR) attachment systems on angle grinders and die grinders. It features a 36-grit ceramic abrasive on a polyester cloth backing, rated for very coarse material removal. At 3 inches in diameter and rated to 20,000 RPM, this disc is built for aggressive grinding, weld blending, and surface preparation on metal. The ceramic abrasive grain self-sharpens during use, maintaining consistent cut rate across the disc life. Each package contains one disc, with a minimum order quantity of 50 units.

This disc is suited for metal fabrication, maintenance, and repair applications where rapid stock removal is required. Typical use cases include weld seam grinding, deburring, and rust or scale removal on structural steel, pipe, and sheet metal. The orange color coding identifies the 777F series within the 3M abrasives lineup. It is primarily installed and used by metal fabricators, pipefitters, ironworkers, and maintenance technicians working in industrial and commercial environments.

Key Features

• Type R (Roloc TR) quick-change attachment for tool-free disc swaps
• 36-grit ceramic abrasive rated as very coarse for aggressive stock removal
• Polyester cloth backing (YF weight) for durability under grinding loads
• 20,000 RPM maximum speed rating
• 3-inch diameter fits standard Roloc TR grinder pads and mandrels
• 777F series ceramic grain self-sharpens to sustain cut rate throughout disc life

Compatibility

Designed for use with Type R (Roloc TR) quick-change attachment systems. Fits standard 3-inch Roloc TR backup pads and mandrels used on pneumatic and electric die grinders and angle grinders equipped with a compatible TR holder.

Installation Notes

Installation is performed by trade professionals and fabricators using a compatible Roloc TR backup pad or mandrel. Ensure the grinder is powered off and air supply disconnected before changing discs. Thread the disc button onto the mandrel until it seats securely, then verify the tool RPM rating does not exceed the disc maximum of 20,000 RPM before operation. Always wear appropriate PPE including eye protection and gloves when operating grinding equipment.