2

What is the drill bit on the far left hand side of the machine in the first picture?

I believe it cuts holes shaped liked those in the second picture, which is something I'm trying to achieve. Is it a large countersink bit? I think the hole is about 24mm wide.

1 Answer 1

6

That is a countersink. I would not call it a drill bit, as it's intended to open and shape a hole. Typically a through-hole of the smallest diameter is drilled, then the countersink is performed as a secondary operation. It is typically not advisable to try and "drill" a hole with a countersink.

2
  • That's a pretty big countersink. What's the difference from those and chamfer bits? Technically I think, those are chamfered holes, as they are not intended for fasteners.
    – Mazura
    Jun 23, 2017 at 15:46
  • @Mazura IME, Chamfer bits have long longitudinal flutes, almost like a tapered reamer. Countersink bits have a different cutting head that is usually a single round flute. Functionally there is not a ton of difference. Jun 23, 2017 at 16:00

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.