DRILLING - Practice Mode

Reaming Spot facing Counter boring Counter sinking

Correct Answer: Reaming

Reduce chattering Remove more metals Increase the efficiency Increase the life of the tool

Correct Answer: Reduce chattering

Prevent rough holes Prevent over size holes Prevent unequal angle of cutting edges Prevent friction of drill behind the cutting edges

Correct Answer: Prevent friction of drill behind the cutting edges

75 Degree 80 Degree 90 Degree 120 Degree

Correct Answer: 75 Degree

Drill held not correctly Work is not rigidly he Clearance angle is incorrect Flutes are clogged with chips

Correct Answer: Clearance angle is incorrect