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2HRBG RPM : rev./min Feed : mm/min

Copper Prehardened Steels / Hardened Steels Hardened Steels
NAK / SKD SKD / SKT
Material
Hardness 30 ~ 45HRc 45 ~ 55HRc

Effective RPM FEED Ap Ae RPM FEED Ap Ae RPM FEED Ap Ae
Length
Radius Axial Depth Radial Depth Axial Depth Radial Depth Axial Depth Radial Depth
R0.05 —
R0.1 0.5 54,000 85 0.004 0.004 48,000 75 0.004 0.004 48,000 55 0.002 0.002
R0.15 1 54,000 430 0.010 0.010 48,000 350 0.006 0.007 48,000 280 0.006 0.007
R0.2 1.5 54,000 380 0.008 0.008 48,000 330 0.005 0.005 48,000 250 0.005 0.005
2 47,000 320 0.006 0.006 47,000 250 0.004 0.004 47,000 200 0.004 0.004
R0.25 1.5 42,000 290 0.004 0.004 42,000 200 0.003 0.003 42,000 200 0.003 0.003
2 54,000 640 0.014 0.015 48,000 480 0.010 0.010 41,000 370 0.009 0.010
R0.3 3 49,000 530 0.011 0.011 43,000 370 0.008 0.008 37,000 270 0.008 0.008
4 43,000 460 0.009 0.010 38,000 320 0.007 0.006 32,000 240 0.006 0.006
R0.35 5 37,000 300 0.004 0.006 28,000 200 0.003 0.004 24,000 160 0.003 0.004
R0.4 1 31,000 200 0.002 0.004 26,000 125 0.001 0.003 18,000 110 0.002 0.003
R0.45 2 54,000 870 0.023 0.036 48,000 660 0.018 0.024 37,000 450 0.015 0.024
R0.5 3 54,000 790 0.022 0.036 48,000 590 0.018 0.024 37,000 400 0.015 0.020
4 50,000 660 0.017 0.018 41,000 420 0.012 0.012 31,000 280 0.011 0.012
5 50,000 640 0.012 0.018 38,000 400 0.009 0.012 30,000 270 0.009 0.012
6 37,000 410 0.009 0.018 29,000 330 0.008 0.012 26,000 260 0.007 0.012
8 37,000 360 0.006 0.010 29,000 260 0.005 0.006 26,000 200 0.004 0.006
10 27,000 200 0.003 0.006 27,000 170 0.003 0.003 23,000 150 0.002 0.003
1 20,000 110 0.002 0.004 25,000 110 0.002 0.002 20,000 110 0.001 0.002
2 57,000 1,380 0.029 0.054 42,000 830 0.023 0.036 32,000 550 0.018 0.036
3 57,000 1,250 0.028 0.054 42,000 750 0.022 0.036 32,000 500 0.018 0.036
4 55,000 1,010 0.021 0.036 38,000 580 0.017 0.024 31,000 400 0.014 0.024
5 55,000 1,010 0.021 0.036 38,000 580 0.017 0.024 31,000 400 0.014 0.024
6 48,000 800 0.016 0.018 33,000 480 0.012 0.012 30,000 390 0.009 0.012
8 36,000 610 0.009 0.018 28,000 400 0.008 0.012 27,000 330 0.005 0.012
10 36,000 590 0.009 0.018 28,000 400 0.008 0.012 27,000 330 0.005 0.012
12 36,000 460 0.009 0.018 28,000 400 0.008 0.012 27,000 330 0.005 0.012
14 24,000 280 0.004 0.010 26,000 280 0.004 0.006 24,000 280 0.002 0.006
1 16,000 170 0.001 0.006 24,000 200 0.002 0.003 21,000 240 0.001 0.003
2 57,000 1,670 0.035 0.144 37,000 840 0.027 0.096 27,000 540 0.023 0.096
3 57,000 1,540 0.034 0.144 37,000 770 0.027 0.096 27,000 500 0.021 0.096
4 57,000 1,540 0.034 0.144 37,000 770 0.027 0.096 27,000 500 0.021 0.096
5 54,000 1,130 0.026 0.108 35,000 600 0.020 0.072 26,000 380 0.016 0.072
6 46,000 960 0.019 0.072 28,000 460 0.016 0.048 26,000 370 0.012 0.048
8 46,000 960 0.019 0.072 28,000 460 0.016 0.048 26,000 370 0.012 0.048
10 30,000 570 0.010 0.054 24,000 400 0.009 0.036 23,000 320 0.006 0.036
12 30,000 490 0.007 0.036 24,000 330 0.006 0.024 23,000 290 0.004 0.024
14 30,000 490 0.007 0.036 24,000 330 0.006 0.024 23,000 290 0.004 0.024
16 20,000 300 0.004 0.027 22,000 300 0.004 0.018 20,000 250 0.002 0.018
2 13,000 180 0.002 0.020 21,000 260 0.002 0.014 18,000 220 0.001 0.014
4 56,000 1,800 0.050 0.162 35,000 740 0.039 0.108 27,000 500 0.031 0.108
8 54,500 1,500 0.045 0.063 33,000 600 0.035 0.042 26,500 410 0.029 0.096
10 32,000 800 0.019 0.072 12,215 420 0.020 0.048 22,500 355 0.012 0.048
12 26,500 540 0.017 0.063 22,500 380 0.014 0.042 21,500 330 0.011 0.042
2 23,000 420 0.017 0.063 21,500 380 0.012 0.032 21,500 320 0.010 0.042
4 55,000 2,060 0.063 0.180 33,000 710 0.050 0.120 27,000 500 0.041 0.120
6 55,000 1,860 0.063 0.018 31,000 600 0.050 0.012 27,000 440 0.041 0.120
8 47,000 1,410 0.038 0.108 28,000 570 0.030 0.072 22,000 390 0.024 0.072
10 34,000 1,040 0.027 0.090 21,000 430 0.021 0.060 22,000 390 0.018 0.060
12 23,000 600 0.027 0.090 21,000 430 0.021 0.060 20,000 370 0.017 0.060
14 16,000 350 0.027 0.090 19,000 430 0.018 0.040 20,000 350 0.016 0.060
16 11,000 200 0.027 0.090 19,000 430 0.015 0.027 20,000 330 0.015 0.060
4 115 0.027 0.090 16,000 430 0.013 0.018 20,000 310 0.014 0.060
2 7,600 1,900 0.067 0.190 32,000 685 0.054 0.130 24,500 460 0.043 0.180
3 50,500 2,000 0.072 0.360 32,000 770 0.057 0.240 22,000 480 0.045 0.240
4 46,000 2,000 0.072 0.360 32,000 770 0.057 0.240 22,000 480 0.045 0.240
5 46,000 2,000 0.071 0.360 32,000 770 0.057 0.240 22,000 480 0.045 0.240
6 46,000 2,000 0.071 0.360 32,000 770 0.057 0.240 22,000 480 0.045 0.240
8 46,000 1,500 0.071 0.180 26,000 760 0.055 0.120 17,600 480 0.009 0.120
10 39,000 1,500 0.043 0.180 26,000 760 0.034 0.120 17,600 480 0.027 0.120
12 39,000 1,110 0.028 0.090 17,600 530 0.024 0.060 16,500 420 0.018 0.060
14 29,000 660 0.027 0.090 17,600 530 0.024 0.060 16,500 420 0.018 0.060
16 18,700 640 0.022 0.090 15,400 440 0.018 0.060 14,300 360 0.014 0.060
18 18,700 640 0.022 0.090 15,400 440 0.018 0.060 14,300 360 0.014 0.060
18,700 540 0.017 0.090 14,300 440 0.013 0.060 13,200 360 0.009 0.060
18,700

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