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

Tool life testing on a lathe under dry cutting conditions gauge n and

1.	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
A.	47.4 min
B.	37.4 min
C.	27.4 min
D.	17.4 min
Answer» B. 37.4 min

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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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