Consider the following statements: The helical flute in

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Consider the following statements: The helical flute in a twist drill provides the necessary
1. Clearance angle for the cutting edge.
2. Rake angle for the cutting edge.
3. Space for the chip to come out during drilling.
4. Guidance for the drill to enter into the work piece.
Which of the statements given above are correct?

1. 1 and 2
2. 2 and 3
3. 3 and 4
4. 1 and 4

Correct Option: B

Helical provide rake angle which is zero at centre and increase to helical angle at the periphery form which space chips are coming out.