GRINDING WHEEL PERFORMANCE

The performance of the grinding wheel can be evaluated by measuring the Grinding Removal Ratio (GRR). GRR can be measured by the following method

• Weigh a new (unused) grinding wheel and a part of the work piece on weighing scale
  and note its weight.
• Grind the work piece for a set time.
• After grinding weigh the workpiece and the grinding wheel.
• Material loss/Wheel loss

Where material loss = Weight of workpiece before grinding-weight of the workpiece after grinding. Wheel loss = Weight of grinding wheel before grinding-weight of grinding wheel after grinding. The higher the numbers better the performance of the wheel. Average range values for the 180mm grinding wheel is 10 to 14. GRR should not be less than 6