Bench Grinder Safety

Bench grinders are found in many areas of the schools including technical shops and custodial areas. These devices have several basic adjustments and machine guarding components that must be utilized so the machines can be used safely. Typical accidents involving grinders have included fingers caught in machine components, eye and face injuries due to missing guards and improper eye protection.

Supervisors and instructors must ensure all grinding equipment is code compliant, in safe working condition and users are properly trained in the safe use of the equipment. Please direct any questions regarding safety procedures to your Supervisor or Instructor.

Safety Procedures

• Fasten grinders securely.
• Ensure all guards are in place and secure.
• Adjust tool rests to within 3 mm (1/8 in.) of wheels and should be on horizontal centre of the machine spindle.
• Maintain 6 mm (1/4 in.) wheel exposure with tongue guard.
• As wheel wears down, readjust the tool rest and tongue guard. When you can no longer adjust them, replace the wheel.
• Stand to one side until grinding wheel reaches operating speed.
• Bring work into contact with grinding wheel slowly and smoothly without bumping.
• Apply gradual pressure to allow wheel to warm up, use only the pressure required to complete a job.
• Move the work back and forth across the face of the wheel. This prevents grooves.
• Wheels are made to grind certain items. Do not grind rough forgings on small precision wheels.
• Ensure grinder speed does not exceed the operating speed marked on the wheel.
• Replace worn wheels if you cannot dress them (only dress a wheel if you have been trained in doing so).
• Visually inspect wheels for possible damage before mounting.
• Wear gloves only when necessary.
• Wear proper Personal Protective Equipment (PPE)
• Eye, ear and face protection.
• Safety boots where required.
• Respiratory protection may be required, depending on the work.