Safety

Using Quick‑Mount Hubs on Portable Grinding Wheels

Close up of an operator using a 9" Norton Quantum3 depressed center wheel

What Is a Quick‑Mount Hub?

A quick‑mount hub is a threaded hub permanently attached to a portable grinding wheel. It allows the wheel to be mounted directly onto a threaded angle‑grinder arbor without additional flanges or tools, reducing setup time. 

Only wheels manufactured with an integrated quick‑mount hub should be used as quick‑mount systems.

Pointing out a quick-mount hub on a Norton Quantum3 grinding wheel

Proper Mounting Procedure

  1. Lock the Arbor. Press the lock button on the back of the angle grinder to prevent the arbor from turning.
  2. Install the Wheel. Thread the quick‑mount hub onto the arbor and tighten by hand only.
    • A wrench is not required.
    • The system uses the self‑locking effect:
      • Right‑angle grinders rotate clockwise and use standard right‑hand threads.
      • Rotational force increases friction, naturally tightening the threads during use.

Illustration of a cross section of a grinding wheel with a quick-mount hub being mounted to a right angle grinder

Proper Removal Procedure

  1. Press the lock button on the back of the angle grinder.
  2. Place a wrench on the nut portion of the quick‑mount hub and turn it counterclockwise to break it loose.
  3. Once loosened, remove the wheel by hand by continuing to turn it counterclockwise until fully unthreaded.

Important Safety Notes

  • Only use wheels designed and manufactured with quick‑mount hubs.
  • Never modify a wheel to create your own quick‑mount system.
  • Always follow ANSI, OSHA, and manufacturer safety requirements when using grinding wheels and power tools.
  • Inspect wheels before use and verify compatibility with the machine’s speed rating.

Mounting a Wheel: Quick-Mount Hub vs. Straight Hole

Need More Information?

For additional information on this topic or if you need any other abrasive safety information, please review the Norton Product Safety page, ANSI, OSHA, and all literature provided by the abrasive wheel and machine manufacturer. You may contact the Saint-Gobain Product Safety Department at (508) 795-2317, or contact your Saint-Gobain Abrasives representative with any safety related questions.