Contact wheels forms and grooving
The deeper and wider the grooving the more aggressive the effect of the abrasive grit and the higher the stock removal
Flat coated contact wheels are more ideal for finer grit size
grooving Nr. 2: fine, uniform grooving for fine grinding
grooving Nr. 3: standard grooving for universal grinding (most commonly used grooving)
grooving Nr. 6: “saw-tooth” grooving for coarse grinding