This Pakistan Standard establishes a recommended range of outside diameters, applicable in principle to all milling cutters including metal slitting saws. Cutters whose exact diameters are strictly governed by the particular purpose for which they arejnjtettded (T—slot cutters or keyway cutters for example) are, however, excluded from its scope.
PS 1365-1975 history
1975PS 1365-1975 SPECIFICATION FOR MILLING CUTTERS—RECOMMENDED RANGE OF OUTSIDE DIAMETERS