... , grain, grade,and speed2.Suitable for the work pieces made of materials Chilled steel3.High-speed steel, High-carbon steel, which ... weaker flexibility than A.Suitable for the work pieces made of materials Chilled steel, High-speed steel, High-carbon steel,Chromium ... recessed one side wheel,type 6 straightcup wheel,type 7 recessed two sides wheeltype 8 taper cup wheel, type 9 dish wheel)Material(A,WA ...