A groove is to be milled in a M.S. workpiece by using 10 mm diameter end mill cutter rotating at 350 rpm. The cutter speed should be :

36) A slot is to be milled with a 16 mm slot mill cutter. If cutting speed is 20 m / min., the rpm of the machine should be :

37) Gang milling operation is usually performed when :

38) Which one of the following is the reason for built up edge on the cutting edge of the milling cutter ?

39) As compared to a finish milling cutter, a rough milling cutter of the same diameter will have :