Merit Abrasives 08834181207 Mandrel Cartridge Spiral Rolls M-7

Product Description

The MERIT ABRASIVES 08834181207 is a mandrel designed to hold cartridge spiral rolls for use in die grinders and other rotary finishing tools. It features a 0.125-inch pilot diameter with a 0.5-inch pilot length that inserts into the core of a cartridge roll, securing it during operation. The 0.25-inch shank diameter and 1.25-inch shank length fit standard collets on pneumatic and electric die grinders. Overall length is 2.25 inches. This hardware component is used by machinists, fabricators, and maintenance technicians for deburring, blending, and finishing operations in bores, ports, and contoured surfaces.

This mandrel is suited for use in metalworking, fabrication shops, and maintenance environments where cartridge spiral rolls are used for internal or contoured surface finishing. The M-7 designation identifies the mandrel style, which is matched to specific cartridge roll sizes. It is commonly used in aerospace, automotive, and general metal fabrication applications where controlled abrasive finishing in tight or curved areas is required.

Key Features

• 0.125-inch pilot diameter accepts matching cartridge spiral roll cores
• 0.25-inch shank diameter fits standard die grinder collets
• 2.25-inch overall length provides reach for recessed and contoured work areas
• 0.5-inch pilot length for secure cartridge roll retention during use
• UNSPSC classified as retaining hardware (31163200)
• Sold individually — package quantity of 1

Compatibility

Designed for use with cartridge spiral rolls requiring the M-7 mandrel style. Fits die grinders and rotary tools with a collet accepting a 0.25-inch shank diameter.

Installation Notes

Installation is performed by machinists or tool operators following standard shop safety practices. Ensure the die grinder is fully powered off and disconnected from the air supply or electrical source before changing mandrels or cartridge rolls. Insert the shank fully into the collet and tighten securely before operation. Do not exceed the rated RPM of the cartridge roll being used with this mandrel.