CAT Face Milling Holder Milling Tool Holder, used in the clamping of the cutter with the radial drive groove, such as the face milling cutter, the vertical disc cutter, the set type end mill, high speed and high precision machining . Cat Face Milling Holder Specifications 1. Cat Face Mill Holder material:20CrMnTi 2. hardness:56-58 3. precision taper less than AT3 4. carbon depth less than0.8mm 5. pre-balance standard:G6.3 18000rpm,precision balance G2.520000rpm,25000rpm,30000rpm 6.Lathe Machine Tool Holder Surface"environment protection",special coating surface treatment,improve the hardness and endurance of the surface,cleaness better,accuracy stable,surface