... grade,and speed2.Suitable for the work pieces made of materials Chilled steel3.High-speed steel, High-carbon steel ... , which of strong intensity, high hardness grinding4. thread work piece ... flexibility than A.Suitable for the work pieces made of materials Chilled steel, High-speed steel, High-carbon ... type 9 dish wheel)Material(A,WA,GC,C,DA,DC,PA,38A) 350*40*127 ...