3M 7000120684 Star Mandrel 1/4 X 1/4-20 Ext Thread

Product Description

The 3M 7000120684 is a star mandrel designed to mount and secure abrasive star wheels that feature 1/4-20 internal threads. The mandrel provides a stable, rigid connection between the abrasive star and the drive tool, keeping the accessory centered and locked during rotary operation. It is used in metal fabrication, surface prep, and finishing applications where Scotch-Brite star-style abrasives are the specified tooling. Machinists, fabricators, and maintenance technicians install this mandrel when setting up die grinders or drills for deburring, blending, or surface conditioning work.

This mandrel is suited for shop environments where threaded abrasive stars are regularly cycled on and off a rotary tool. The 1/4-20 external thread configuration matches standard Scotch-Brite star wheel hubs, and the 1/4-inch shank fits standard die grinder and drill collets. It is appropriate for both light maintenance tasks and production-level surface finishing on metal, composite, and similar workpiece materials.

Key Features

• 1/4-20 external thread secures Scotch-Brite star wheels with matching 1/4-20 internal threads
• 1/4-inch shank diameter fits standard die grinder and drill collets
• Rigid mandrel design keeps abrasive star centered under load
• Sold individually — unit of measure is each

Compatibility

Designed for use with Scotch-Brite star abrasive wheels that have 1/4-20 internal threads. Verify thread engagement and shank compatibility with your specific rotary tool before use.

Installation Notes

Installation is performed by machinists or maintenance technicians familiar with rotary abrasive tooling. Before mounting or removing the mandrel, disconnect the drive tool from its power source and confirm the spindle has come to a complete stop. Thread the mandrel fully into the abrasive star by hand, then seat the shank into the collet of the die grinder or drill according to the tool manufacturer's specified depth. Do not exceed the maximum RPM rating of the abrasive star being used.

Technical Specifications

• Thread Size: 1/4-20 External
• Shank Diameter: 1/4 inch
• UPC: 50048011139284
• Unit of Measure: Each
• Minimum Order Quantity: 1

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000120684