GRINDING FEEDS AND SPEEDS Table 7. Group 7—Tool Steels, T15, M15 Machinery's Handbook, 31st Edition
1275
ECT = 0.00017 mm ECT = 0.00075 mm Constant C = 2270 Constant C = 1970 Constant C = 1505 Constant C = 1010 V T SMRR V T SMRR V T SMRR V T SMRR 100 685 115 595 195 455 225 305 230 10 1250 210 1080 355 825 415 555 415 1 2270 385 1970 650 1505 750 1010 760 ECT = 0.00033 mm ECT = 0.00050 mm
10000
100
ETC = 17 ETC = 33 ETC = 50 ETC = 75
ECT = 17 ECT = 33 ECT = 50 ECT = 75
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100
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100
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V, m/min
V, m/min
Fig. 7a. T - V
Fig. 7b. SMRR versus V , T = 100, 10, 1 minutes
Table 8. Group 8—Heat Resistant Alloys, Inconel, Rene, etc. ECT = 0.00017 mm ECT = 0.00033 mm ECT = 0.00050 mm ECT = 0.00075 mm Constant C = 2150 Constant C = 1900 Constant C = 1490 Constant C = 1035 V T SMRR V T SMRR V T SMRR V T SMRR 100 650 110 575 190 450 225 315 235 10 1185 200 1045 345 820 410 570 425 1 2150 365 1900 625 1490 745 1035 780
100
10000
ECT = 17 ECT = 33 ECT = 50 ECT = 75
ETC = 17 ETC = 33 ETC = 50 ETC = 75
10
1000
1
100
100
1000
10000
100
1000
10000
V, m/min
V, m/min
Fig. 8a. T - V
Fig. 8b. SMRR versus V , T = 100, 10, 1 minutes
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