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Answer Posted / rohit mathanker
there is four angle use in twist drill
1 cutting angle it is 118 is quite common but very 80 to
140 degree soft material required large value of it wherse
hard material required low value.
2 lip clearance angle its value varies 8 to 14
3 rake angle it is large for hard material because for
removeing the chip and small for hard material
| Is This Answer Correct ? | 18 Yes | 3 No |
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