3M 7000121747 | 700143 Standard Abrasives 1/4" Shank x 3.0 in Length Specialty Mandrel

Description

3M 7000121747 Standard Abrasives Mandrel is a steel specialty mandrel made to extend abrasive reach and access confined geometries. The 1/4" shank x 3.0" overall length fits standard 6 mm collets and die grinders, enabling users to drive 1" diameter x 1" wide x 3/16" center hole unitized wheels. Specially made for heavy industrial use, this 3M specialty mandrel secures center hole unitized wheels with an 8-32 eyelet attachment and threaded drive for reliable torque transfer. Use it to reach tight bores, internal shoulders and other hard to access areas where a standard wheel cannot engage the work surface. Built of hardened steel, the mandrel provides repeatable, measurable performance and long service life under rotary tool loads.

Product Features and Benefits

Precision 1/4" (6.35 mm) shank for secure mounting

The 0.25" shank diameter fits common collets and drill chucks for stable concentric rotation and low runout during high-speed grinding.

3.0" overall length to reach tight, recessed areas

700143 features extended length provides access inside bores and narrow cavities so unitized wheels can contact hard-to-reach surfaces without tool interference.

Steel construction for durability and repeatability

3M Specialty Mandrel hardened steel body resists bending and wear under load, delivering consistent concentricity and long operational life in industrial applications.

Designed for center-hole (CH) unitized wheels

Threaded 8-32 eyelet attachment drives 1"×1"×3/16" CH unitized wheels securely, simplifying setup for surface conditioning tasks.

Compatibility with die grinders and rotary tools

Optimized for rotary tool mandrel and die grinder mandrel use, enabling quick attachment and dependable torque transmission for abrasive operations.

Frequently Asked Questions

Is this a 1/4 inch shank mandrel?

Yes, the mandrel uses a 0.25" (6.35 mm) shank suitable for standard collets and chucks.

Can I use this as a rotary tool mandrel or die grinder mandrel?

Yes, it is designed for die grinders and rotary tools to drive unitized wheels in confined areas.

Does it function as an abrasive wheel mandrel for unitized wheels?

Yes, it drives 1" diameter x 1" wide x 3/16" CH unitized wheels via an 8-32 threaded eyelet.

What wheel sizes and attachment type does the mandrel accept?

It accepts 1"×1"×3/16" center-hole unitized wheels and uses a threaded 8-32 attachment for secure fitting.

Warning:

This product can expose you to materials and/or chemicals including arsenic, lead, and other materials and/or chemicals which are known to the state of California to cause cancer and/or reproductive harm.

For more information, visit www.P65Warnings.ca.gov