Machinery's Handbook, 31st Edition
MACHINING ECONOMETRICS 1209 Shape of Tool Life Relationships for Turning, Milling, Drilling and Grinding Operations—Overview.— A summary of the general shapes of tool life curves ( V - ECT - T graphs) for the most common machining processes, including grinding, is shown in double logarithmic coordinates in Fig. 17a through Fig. 17h.
1000
1000
100
100
T = 15 T = 45 T = 120 Tool Life , T (minutes)
Tool Life (minutes)
T = 15 T = 45 T = 120
10
10
0.01
0.1
1
0.01
0.1
1
ECT , mm Fig. 17b. Tool Life for Turning Low-Alloy Steel Using Coated Carbide
ECT , mm Fig. 17a. Tool Life for Turning Cast Iron Using Coated Carbide
1000
1000
T = 15 T = 45 T = 120
Tool Life (minutes)
T = 15 T = 45 T = 120
100
100
10
10
1
1
0.01
0.1
1
0.01
0.1
1
ECT , mm Fig. 17d. Tool Life for End-Milling Low-Alloy Steel Using Uncoated Carbide
ECT, mm Fig. 17c. Tool Life for End-Milling AISI 4140 Steel Using High-Speed Steel
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