what is the angle of twist drill
Answers were Sorted based on User's Feedback
Answer / 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 |
Answer / rohit mathanker
90* angle use for bekelite hard plastic.
118* for cast iron
120 for mild steel
Is This Answer Correct ? | 7 Yes | 0 No |
Answer / kiran
is cutting angle and point angle same???????
i think cutting angle is angle made by cutting edge to work
surface.. then how will 118 becomes cutting angle?
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / chaitanya pithawa
we cant say from this,because for every material the angle
is different and there is 3 angle of twist drill.
118 is point angle for bronze and cast steel and for
Al,Brass and SS,118 is the min no. of the point angle.
Is This Answer Correct ? | 2 Yes | 1 No |
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