A shop technician is preparing to mount a new vitrified abrasive wheel onto a bench grinder and must perform a standard ring test to check for hidden structural damage. Arrange the steps of the ring test procedure in the correct chronological order from first to last.
- 1Suspend the grinding wheel freely by supporting it through its center arbor hole with a small wooden dowel, rod, or finger.
- 2Gently tap the side of the wheel approximately 45 degrees from the vertical centerline using a light, non-metallic implement such as a wooden screwdriver handle.
- 3Listen to the resulting sound to verify that it produces a clear, resonant metallic ring rather than a dull, dead thud.
- 4Rotate the wheel 45 degrees and repeat the tapping procedure around the circumference to test all quadrants.
Answer
The correct sequence begins with suspending the wheel freely through its arbor hole, followed by tapping the wheel 45 degrees from the vertical centerline with a non-metallic handle, listening for a clear resonant ring, and finally rotating the wheel to repeat the test at other points around the perimeter.
The standard safety procedure for testing a vitrified abrasive wheel requires isolating the wheel first by suspending it freely through the arbor hole. Next, the technician taps the face of the wheel 45 degrees from vertical using a light non-metallic handle. The technician listens for a clear metallic ring, which indicates structural integrity. Finally, the wheel is rotated 45 degrees and re-tapped to verify that no cracks exist in any quadrant.
Step-by-Step Solution
Key Concept
Abrasive wheel ring test procedure for bench grinder safety
Estimated Time:45s