What drills should be used to drill holes with diameter 5mm and depth 65mm? Urgent! Thank you!
An ordinary twist drill with a diameter of 5mm and an effective working length of 80mm. High turn, frequently anti chip, multi pour cooling liquid.Only 65mm deep hole ah, just find a 5 drill bit, as long as long enough, the key is to see how the drill grinding.Parabola drills are generally long long hole drill 65 waste and can really wear parabola drills and few people.
You don't know what material you need to drill, what is the material, or how hard it is,Ordinary material on the ordinary line, and if the material hardness, then you have to use M35 cobalt or alloy drill.
With D340 lengthened drill, 5mm's drill bit, his total length is: 132mm, blade length: 87mm, blade length is the effective working surface.
