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Bench and Pedestal Wheel Mounting
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How should you mount an abrasive wheel?
How should you mount an abrasive wheel? - Follow the manufacturer's recommendations when handling, grinding, maintaining and storing abrasive wheels.
- Ensure you have the correct type and size wheel for the machine by checking the markings on both. The machine spindle speed must not be greater than the speed marked on the wheel.
- Examine the wheel for cracks or chips and perform the "ring test." Replace the wheel, if faulty.
- Do not force a wheel onto the machine spindle or change the size of the mounting hole.
- Maintain even pressure from both flanges against the sides of the wheel. Check flanges with a straight edge. Worn or warped flanges must not be used.
- Maintain a clearance (undercut relief) of at least 3 mm (1/8 in.) to prevent pressure on the wheel near the hole.
- Check the surface of the abrasive wheel and flanges to ensure that no particles are present.
- Use paper blotters between a wheel and flanges to take up slight wheel surface roughness.
- Ensure mounting pilot(s) is rounded with length about 2/3 width of the wheel.
- Extend the threaded section well inside the loose flange.
- Tighten grinding wheels just enough to prevent them from slipping. Over tightening the spindle nuts or clamping screws can damage the wheel and grinder parts. With multiple screw mounting flanges, tighten the bolts uniformly. Start by barely tightening a screw, "snug-up" opposite screw and, in a crisscross manner, continue until all mounting screws are uniformly tight.
- Place the threads of the central spindle in the direction that allows the nut to tighten because of the force of the work being done.
- Replace all guards.
- Before turning on the power, the operator should turn the wheel by hand to check for appropriate wheel clearance.
- Warn all persons to stay clear of the area where the wheel is used.
- Stand to one side and test the wheel. Start and run the wheel for at least 1 minute. If any undue vibration occurs, switch off immediately and make adjustments. Never adjust moving machinery.
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Document last updated on January 26, 1998
Copyright ©1997-2008 Canadian Centre for Occupational Health & Safety
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