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  • Basic Auto Repair Safety

  • Automotive Lift Safety

  • Brake and Clutch Repair Safety

  • Chemicals and Fluids Safety

  • Fire Safety

  • Frame Straightener Safety

  • Fuel Handling Safety

  • Grinder Safety

  • Hand Tool Safety

  • Inspection Pit Safety

  • Ladder Safety

  • Physical Lifting Safety

  • Power Tool Safety

  • Spray Painting Safety

  • Steering and Suspension Repair Safety

  • Tire Removal and Replacement Safety

  • Vehicle Handling Safety

  • Vehicle Jack Safety

  • Welding, Cutting, and Burning Safety

  • OSHA Requirements for Auto Repair Shops

Grinder Safety

Auto mechanic using a grinder tool on a vehicle

Grinders transform energy into a powerful rotational force applied to a disk. Used for grinding, cutting, or polishing, they present significant hazards if the user loses control or handles the tool in an irresponsible manner.

Inspect the grinding wheel

Never use a damaged grinding wheel. Always inspect grinding wheels before using them:

  • Visually check for for cracks, chips, and grooves.
  • Tap the wheel gently with a screwdriver or similar tool and look for cracks and damage that aren't immediately visible.
  • Listen when tapping the wheel to perform the ring test. According to Simmons, if it gives off a dull sound, the wheel might be damaged and shouldn't be used.
  • Confirm that the wheel is securely attached to the tool and doesn't wobble.
  • Never use a grinding wheel if the labeled RPM speed is lower than the rated speed of the grinder tool.
A cutting wheel in good condition for use on a grinder.
Check that the wheel/disc is in good shape before using it.

Bench vs portable grinders

Some grinders are "bench grinders" meant to be secured to a workbench, while others are designed to be portable. Never use a vise to clamp a portable grinder to a workbench. Similarly, never use a bench grinder that isn't properly secured to a workbench according to the manufacturer's instructions.

A bench grinder properly secured to a workbench.
A bench grinder must be properly secured to a workbench.