Tap with 5 taps. How many drills are drilled?
Calculation formula:The workpiece is a brittle material (cast iron, bronze, etc.): the bore diameter is D=d- (1.04 to 1.08) tThe workpiece is made of plastic material (steel, copper, etc.): bore diameter is D=d-tD: nominal diameter of thread, t: pitch, unit: mm
Generally, a drill with a 4 cm bit.
Drilling refers to the use of drills to drill holes in solid material. The drilling work in the exploration work, as well as the auxiliary tools needed for drilling and some emergency measures are described here.
