Drill and Chamfer

[OLD_Newbie]

I am trying to find a supplier that sells a tool that will drill and chamfer holes at the same time in steel. I need the drill size to be for an M6. (.197-.201) Any leads would be appreciated.

[neilw20]

Originally Posted by OLD_Newbie I am trying to find a supplier that sells a tool that will drill and chamfer holes at the same time in steel. I need the drill size to be for an M6. (.197-.201) Any leads would be appreciated.

My solution to this has been to use a center drill, and turn the chamfering part to the correct angle on the lathe using some of the fancy turning tool tips that will allow you to machine HSS. After I have the correct angle, I just hand grind some clearance as the turned surface would just rub.
If the center drill is not long enough, you can drill up the centre of one with a carbide drill, then put a 6mm (tapping) drill up the middle, and weld at the end that doesn't matter. Any good toolmaker should be able to knock one up in an hour.

[OLD_Newbie]

What I need is for milling. We make cnc machines here and there are over 100 drilled and tapped holes per side. I could easily make a couple but with the number of holes I don't have time to make this tool. I could also add a chafer tool to the program but that takes up too much time. Surely (hopefully) someone makes an adjustable depth drill with chamfer .

[mrainey]

Look here.

http://www.vernondevices.com/chambit.htm

[OLD_Newbie]

Looks very promising thank you very much....

[rhundl]

Check out Kennametal they have a drill chamfer tool also that has an inserted chamfering blade