3M 7010299085 Straight Cartridge Roll 80 Grit 3/8 in

Product Description

The 3M 7010299085 is a straight cartridge roll abrasive designed for use with rotary die grinders and mandrel-style holders in metalworking, fabrication, and finishing applications. It measures 3/8 inches in diameter and cuts at 80 grit, placing it in the medium grade range — effective for blending welds, deburring edges, and removing light stock from metal surfaces. The abrasive material is aluminum oxide, bonded to a cloth backing that provides flexibility and durability during extended use. Maximum operating speed is 24,000 RPM. This type of roll is a standard consumable stocked by metal fabrication shops, maintenance crews, and tool rooms.

Straight cartridge rolls in this diameter and grit are commonly used for inside-diameter finishing, port blending, and surface prep in tight spaces where flat abrasives cannot reach. Typical applications include deburring drilled holes, smoothing weld joints on tubing and pipe, and general surface conditioning on ferrous and non-ferrous metals. The cloth backing allows the roll to conform slightly to curved surfaces, making it useful for contoured workpieces. This roll is sold individually but requires a minimum order quantity of 100 units per order.

Key Features

• Aluminum oxide abrasive grain for consistent cutting on ferrous and non-ferrous metals
• Cloth backing provides flexibility and tear resistance during use
• 80 grit medium grade suitable for blending, deburring, and light stock removal
• Rated to 24,000 RPM for compatibility with standard die grinders
• 3/8 inch diameter fits standard cartridge roll mandrels

Compatibility

Designed for use with cartridge roll mandrels sized for 3/8 inch diameter rolls, as used in pneumatic and electric die grinders operating at speeds up to 24,000 RPM.

Installation Notes

Install onto a compatible mandrel following the mandrel manufacturer's instructions and ensure the roll is seated securely before operating. Always verify the grinder's rated RPM does not exceed the roll's 24,000 RPM maximum before use. Wear appropriate eye and face protection, and confirm the workpiece is secured before grinding. Inspect the roll for damage or looseness before each use and discard any roll that shows signs of unraveling or core separation.