flyfisherman246
Plastic
- Joined
- Jun 28, 2021
I have searched all over for this answer and not quite satisfied with what I have read. I am looking to build a revolver cylinder where I will use a twist drill bit to drill all the way through front to back. Then going to use a chucking reamer to get exact size round hole for the bushing on the chamber reamer to follow. We all know drill bits tend to wonder and drill holes that aren't round, and we also know reamers follow the existing hole. So ideally you would want the straightest rounded hole possible for the chucking reamer to follow. We are talking about a roughly .5" hole going through hardened steel about 1.9" deep.
Here is the best way I can dream up and want your guys opinion on this. Use a twist drill bit (HSS or Carbide)to drill straight through one size under 1/2". Then follow this hole with a 1/2" square carbide end mill to help straighten the hole. Then finally follow this hole with a .504" chucking reamer which should follow the hole of the end mill, keep it round, and exact size to fit the bushing on the chamber reamer.
I would imagine using a boring head would be the best solution here, but not willing to spend that kind of money right now on this personal project. I don't have much experience cleaning up holes with an end mill, as I usually use a boring bar in a lathe for rifle barrels. Do you think following the twist drill hole with the end mill would be beneficial? Do end mills cut straight and round when chasing a hole? Or is the twist bit the best I'm going to get and should skip the end mill and go straight to the chucking reamer?
Thank you
Here is the best way I can dream up and want your guys opinion on this. Use a twist drill bit (HSS or Carbide)to drill straight through one size under 1/2". Then follow this hole with a 1/2" square carbide end mill to help straighten the hole. Then finally follow this hole with a .504" chucking reamer which should follow the hole of the end mill, keep it round, and exact size to fit the bushing on the chamber reamer.
I would imagine using a boring head would be the best solution here, but not willing to spend that kind of money right now on this personal project. I don't have much experience cleaning up holes with an end mill, as I usually use a boring bar in a lathe for rifle barrels. Do you think following the twist drill hole with the end mill would be beneficial? Do end mills cut straight and round when chasing a hole? Or is the twist bit the best I'm going to get and should skip the end mill and go straight to the chucking reamer?
Thank you