The importance of dressing and turning abrasive grinding wheels can never be over-emphasized. Dressing will restore the exposure and cutting ability of the abrasives on the wheel surface.
Dressing must be performed after truing or whenever the wheel surface becomes loaded or glazed, or has lost its cutting ability. Dressing removes the unwanted residue, such as braze and steel particles, from the wheel surface. Dressing also removes a certain small portion of the cutting abrasive. Truing is the procedure for eliminating any unwanted 'run-out' once the wheel has been mounted. Truing is best done wet.
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