EHS Topic of the Month: Ring Test Abrasive Grinding Wheels
Date postedFebruary 26, 2024
A ring test is a crucial safety procedure conducted to assess the integrity of abrasive grinding wheels before use. It involves a simple yet effective method of tapping the wheel to produce a distinctive ringing sound, providing valuable insights into its condition.
When to Conduct a Ring Test
- New Installation: Perform a ring test when initially installing a new abrasive grinding wheel.
- After Storage: If a wheel has been in storage for an extended period, conduct a ring test before using it.
- After Impact: Following any impact or mishandling, assess the wheel's integrity through a ring test.
Why Ring Tests Are Important
- Detecting Cracks and Defects: Ring tests help identify hidden cracks or defects within the wheel that may compromise safety during operation.
- Ensuring Structural Integrity: Assessing the sound produced ensures that the wheel maintains its structural integrity, minimizing the risk of breakage during use.
- Preventing Accidents: Conducting ring tests is a proactive measure to prevent accidents and injuries caused by a faulty grinding wheel.
How to Conduct a Ring Test
- Suspend the Wheel: Hang the wheel by from a pin by its center hole and ensure the wheel is dry and free from dust.
- Tap to Ring the Wheel: Lightly tap the wheel with a nonmetallic tool, such as a screwdriver handle, 1 to 2 inches from the edge of the wheel and 45 degrees to the wheel center line to create a clear, ringing sound. Rotate the wheel 45 degree and repeat.
- Listen for Sound Changes: A clear and sustained ring indicates a healthy wheel, while a dull thud may suggest internal flaws. Please note that organic bonded wheels may not emit the same clear metallic ring as do vitrified and silicate wheels.
- Inspect Visual Clues: Examine the wheel for visible cracks, chips, or any irregularities that may accompany an unsatisfactory sound.
- Repeat if Necessary: If uncertainties persist, repeat the ring test or consult the manufacturer for further guidance.
Remember to ring test all abrasive grinding wheels, including those on your hand-held grinders!
See OSHA Standard 1910.215(d)(1) for detailed ring test requirements.
ANSI B7.1 “Safety Requirements for the Use, Care and Protection of Abrasive Wheels” contains answers to most abrasive wheel safety-related questions and may be referred to for further information.
ANSI B7.1 “Safety Requirements for the Use, Care and Protection of Abrasive Wheels” contains answers to most abrasive wheel safety-related questions and may be referred to for further information.