45 degree chamfer bit for steel

[Ballon Corp]

I am attempting to chamfer quite a large finger hole in a knife, and was wondering if there was a bit for a drill press that could accomplish this. Im sure I could hand grind it with a Dremel if I really wanted to, but I honestly don't trust myself to be that consistent at all

I have looked around for quite a while for something that would do this, but so far I haven't found anything, all of the bits I've found are for wood and don't look like they would hold up against steel. Am I using the wrong search terms or something? Anyone done this before or have any advice ?

 

[P.Brewster]

The largest hole I mess with is Ø0.8". I use a single-flute countersink (cobalt or HSS), run at 300 RPM, the lowest speed possible in my drill press. I would go even slower if I could. I use a paste lubricant or a thick oil.

MA Ford or Keo are good brands. Look at pg 54 of the current Enco online catalog. Your steel must be annealed.

 

[Ballon Corp]

The largest hole I mess with is Ø0.8". I use a single-flute countersink (cobalt or HSS), run at 300 RPM, the lowest speed possible in my drill press. I would go even slower if I could. I use a paste lubricant or a thick oil.

MA Ford or Keo are good brands. Look at pg 54 of the current Enco online catalog. Your steel must be annealed.

Thanks for your help !

 

[i4Marc]

Another idea is to use a step drill. Between the different size steps are angled transitions. I use the transitions to chamfer holes larger than my countersink bits can handle.