what is the angle of twist drill

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

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