•  Flanges pulled up unevenly causing side strains on wheel.

• Wheel overheated.

• Flange screw loose.

• Work jammed into wheel causing excessive pressure.

• Use only standard paper or blotting paper gaskets. Be sure gaskets and flanges are clean. Pull up evenly on alternate bolts before cinching up.

• Use plenty of coolant for dressing and grinding. Do not force or jam work into wheel.

• Keep flange screws tight at all times.

• Prevent work jamming into wheel.

Irregular Break.

• Faulty wheel.
• Wheel dropped or subject to hard blow.
• Work jammed into wheel.
• Wheel forced on collet when mounting.
• Suspend wheel and tap lightly before mounting. If result is not a clear ping do not use wheel.
• Do not handle heavy wheels except with special lifting device. Do not subject wheels to hard blows.
• Prevent work jamming into wheel. Make certain none of the pieces are oversize, particularly on infeed.
• Wheel should be just a nice sliding fit (Maximum clearance of 0.003" on diameter) on collet and must be put on squarely. Have collet on bench. Start wheel on collet and tap lightly all around with a small piece of wood - do not let wheel drop on collet.