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Tool life testing on a lathe under dry cutting conditions gauge n and C of Taylor tool life equation as 0.12 and 130 m/min. respectively. When a coolant was used, C increased by 10%. The increased tool life with the use of coolant at a cutting speed of 90 m/min is
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- 47.4 min
- 37.4 min
- 27.4 min
- 17.4 min
Correct Option: A
n = 0.12, c = 130 m /min
C1 = 130 × 1.1 = 143 m/min
V1 = 90 m /min
V1T1n = C1
90(T1)n = 143
T1 = | 1/0.12 | |||
90 |
T1 = 47.4min