The 1A1 Precision Wheel is primarily used for precision slot grinding in thickness over .050”, where a thickness tolerance of +0/-.0005” is sufficient. The 1A1 Precision wheel is available in diameters of 4”, 5”, and 6”, with a 1/4” diamond or CBN depth and an abrasive core. The Diamond or CBN section is flush with the abrasive core, or upon request, is available with a 1/4” wide, approximately .005” deep relief. The thickness of the 1A1 Precision Wheel ranges from .020” to .250”, in increments of .001” or fraction thereof. The use of a Diacut 1A1 Type support flange is required for stability and safety. The 1A1 flange is available from 3” to 5 1/2” diameters, in increments of 1/2”. If a smaller hole size is required, the Diacut 1A1 Hole Reduction Flange is available.