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3 D4 20 50 4T 3 1R0
regular and irregular polygons
Better hardness and wear resistance
anti-vibration
BB Center Drill Carbide Diameter:5 3 D4 20 50 4TBB Center Drill 60 is used for producing center holes in work pieces which require machining between centers. Right hand cut Carbide A form (d1*L1*D*L) 1*1. 6*4*50 1. 5*2. 1*4*50 2*2. 6*6*50 2. 5*3. 1*6*50 3*4*8*50 4*5*10*60 5*D10*70 6*D12*75 HI, welcome to BB official store. We are professional manufacturer ,development and production of machining tools. We provide various tools for you . You can follow us and see more. You have free choice of