3M 7100085779 Tapered Cartridge Roll P120 1/2x1x1/8 in

Product Description

The 3M 7100085779 is a full tapered cartridge roll in the 341D series, designed for precision grinding and finishing work on contoured surfaces, slots, and hard-to-reach areas. Built on an X-weight cloth backing, it delivers the durability needed for aggressive material removal without premature breakdown. The abrasive is aluminum oxide, resin bonded for heat resistance, and graded at P120 — a fine grit well suited for blending, deburring, and light stock removal. The roll measures 1/2 inch wide, 1 inch in length, and 1/8 inch in diameter, making it a compact tool for tight-tolerance finishing work. Installation requires a matching mandrel and a rotary tool, die grinder, or similar powered spindle. Machinists, metal fabricators, and toolroom technicians are the primary users.

This cartridge roll is used in metalworking, fabrication shops, and maintenance applications where standard flat abrasives cannot conform to the workpiece geometry. It is well matched for deburring drilled holes, blending weld seams in confined areas, and finishing curved or contoured metal surfaces. The tapered profile allows access to angled recesses and chamfered edges that straight-shank abrasives cannot reach. At P120 grit, it is appropriate for intermediate finishing passes after coarser stock removal is complete.

Key Features

• Aluminum oxide abrasive grain for consistent cut rate on ferrous and non-ferrous metals
• X-weight cloth backing provides high tensile strength and resistance to tearing under load
• Resin bond construction resists heat buildup during extended grinding operations
• Full tapered profile reaches angled recesses, slots, and contoured surfaces
• P120 grit delivers a balance of material removal and surface finish quality
• Compact 1/2 inch x 1 inch x 1/8 inch size fits standard cartridge roll mandrels

Compatibility

Designed for use with standard cartridge roll mandrels on die grinders, rotary tools, and similar spindle-driven equipment rated for the appropriate RPM of this roll size.

Installation Notes

Installation is performed by threading the roll onto a compatible mandrel and tightening per the mandrel manufacturer's specifications. Always verify the tool's rated RPM does not exceed the maximum rated speed of the abrasive before operation. Wear appropriate eye protection and gloves during installation and use. Inspect the roll for tears, separation, or uneven wear before each use and replace if damage is found.

Technical Specifications

• Series: 341D
• Abrasive Material: Aluminum Oxide
• Backing Type: X-Weight Cloth
• Bond Type: Resin
• Grit: P120
• Width: 1/2 inch
• Length: 1 inch
• Diameter: 1/8 inch
• Weight: 0.01 pounds
• Unit of Measure: Roll
• UPC: 00051144972593

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100085779