EndmillsSquareRadiusBallnoseMulti-PurposeGeneral-purposeHighEfficiencyHardene dSteelRoughingNon-ferrousMetalCFRPCoatedUncoated Stock ±0.01 DC DN DMM h6 ap MOLD FINISH MASTER SUMIBORON Ballnose Endmills for Copper Electrode Machining BNBC Type CopperAlloy Ballnose Flutes Side Milling Face Milling R-Grooving Profiling Fig 1 RE±0.005 APMX 15˚ LU LF I Body Dimensions (mm) Cat. No. RadiusRE Dia.DC Cutting Edge Length Neck Length Overall Length Head Dia.APMXLULFDNShank Dia.DMMFig BNBC 2R010-0034 ● 0.1 0.2 0.2 0.3 50 0.17 4 1 BNBC 2R010-0104 ● 0.1 0.2 0.2 1.0 50 0.17 4 1 BNBC 2R020-0054 ● 0.2 0.4 0.3 0.5 50 0.37 4 1 BNBC 2R020-0204 ● 0.2 0.4 0.3 2.0 50 0.37 4 1 BNBC 2R030-0104 ● 0.3 0.6 0.4 1.0 50 0.57 4 1 BNBC 2R030-0304 ● 0.3 0.6 0.4 3.0 50 0.57 4 1 BNBC 2R050-0304 ● 0.5 1.0 0.6 3.0 50 0.97 4 1 Grade: BN700 Identification Code BNBC 2 R030 - 010 4 Series Code Number Ballnose Neck Shank of Teeth Radius Length Dia. Recommended Cutting Conditions 1. Use a machine with high rigidity for stable cutting. 2. ‌N on-water soluble cutting oil is recommended. Supply as a mist or external coolant. Take fire prevention precautions to avoid fire hazards caused by sparks igniting during machining or tool breakage. 3. Shorten overhang as much as possible. 4. Adjust cutting conditions according to actual conditions as machine rigidity and other conditions may vary. 5. Depths of cut shown in the table of conditions are maximum depths. Adjust the actual depth of cut to the desired machined surface roughness. Side Milling pf Work Material Copper Alloy Cutting Conditions Spindle Speed Feed Rate Standard depth of cut (mm) Cat. No. (min-1) (mm/min) ap pf BNBC 2R010-0034 20,000 350 0.01 0.02 2R010-0104 -50,000 350 0.007 0.015 BNBC 2R020-0054 20,000 800 0.025 0.05 2R020-0204 -50,000 700 0.02 0.03 BNBC 2R030-0104 20,000 1,400 0.05 0.15 2R030-0304 -50,000 1,200 0.04 0.1 BNBC 2R050-0304 20,000 -50,000 2,200 0.15 0.35 I142