Drill chuck is used for holding the straight shank drill having diameter less than 12 mm.
22) Which one of the following is used to hold the straight shank drill having diameter less than 12 mm ?
Answer is:
Drill chuck
Explanation:
Related Drilling and Reaming MCQ - Machinist(Set-1) with Answers
Answer is:
Rigidity of the fixture
Answer is:
8.5 mm
Explanation:
Tapping is the operation done for forming internal threads by means of the tool called tap. Before a tap is used for cutting internal threads, a hole is to be drilled. The diameter of the hole should be such that it should have sufficient material in the hole for the tap to cut the thread.
Tap drill size is given by:
Tap drill size = Major diameter - Pitch
Calculation:
In M10 × 1.5, 10 mm is the major diameter of the thread and 1.5 mm is the pitch diameter.
Tap drill size = 10 - 1.5 = 8.5 mm
Answer is:
Width of job
Explanation:
Width of job will not influence the selection of the cutting speed while performing operation on drilling machine.