3M 7000121790 Cartridge Roll Mandrel CM-9 Threaded

Product Description

The 3M 7000121790 is a threaded cartridge roll mandrel designed to hold abrasive cartridge rolls for grinding and finishing in hard-to-reach areas. Designated as the CM-9, this mandrel features a 0.12 inch pilot diameter and attaches to rotary power tools such as die grinders and drills via a threaded shank secured into a collet assembly or drill chuck. Made of plated steel, it adds effective reach into interior diameters, holes, angles, and curved surfaces where flat abrasives cannot access. The cartridge roll is sold separately. Weighing 0.045 pounds, the mandrel is a lightweight addition to any metalworking toolkit.

This mandrel is well suited for metalworking applications where access to tight interior geometries is required. Typical use cases include deburring, blending, and finishing inside bores, tubes, and contoured workpiece surfaces in fabrication, maintenance, and repair environments. The CM-9 is compatible with straight, full tapered, and half tapered cartridge rolls that match its 0.12 inch pilot diameter. It is used by metalworkers, machinists, and fabricators working with die grinders or similar rotary tools in both shop and field settings.

Key Features

• Threaded mandrel design secures cartridge roll for stable grinding and finishing
• 0.12 inch pilot diameter fits corresponding cartridge roll sizes
• Compatible with straight, full tapered, and half tapered cartridge roll styles
• Plated steel construction for durability in abrasive applications
• Shank secures into collet assembly or drill chuck of standard rotary power tools
• Extends reach into interior diameters, holes, and other confined workpiece areas

Compatibility

Fits all Standard Abrasives straight, full tapered, and half tapered cartridge rolls sized to the 0.12 inch pilot diameter. Designed for use with rotary power tools including die grinders and drills with compatible collet or chuck assemblies.

Installation Notes

Installation and use should be performed by machinists or metalworkers familiar with rotary abrasive tooling. Always power down and disconnect the rotary tool before loading or removing the mandrel. Confirm the shank is fully seated and tightened in the collet or chuck before operation. Inspect the mandrel and cartridge roll for wear or damage prior to each use.

Technical Specifications

• Mandrel Designation: CM-9
• Pilot Diameter: 0.12 inches
• Shank Type: Threaded
• Material: Plated Steel
• Weight: 0.045 pounds
• UPC: 00051115329364

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000121790