When drilling holes larger than 1/2 inch, drilling a smaller hole first is a good practice. This is called a pilot hole, and the pilot drill should have a diameter __________.
A
smaller than the dead center of chisel edge of the larger drill
B
slightly larger than the web thickness of the larger drill
C
small enough to ensure the maximum cut by the larger drill
D
equal to at least 1/2 the diameter of the larger drill
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Question 1 / 205eccef9bbacbc34ba4d4519d
Question 1 of 205eccef9bbacbc34ba4d4519d
When drilling holes larger than 1/2 inch, drilling a smaller hole first is a good practice. This is called a pilot hole, and the pilot drill should have a diameter __________.
When drilling holes larger than 1/2 inch, drilling a smaller hole first is a good practice. This is called a pilot hole, and the pilot drill should have a diameter __________.