Is there one tool made for this?

[mlinder]

I countersink parts all the time. However the attached file shows a countersink with an added recess area above it that I have never come across.

Do I have to use an endmill or flat drill first to create the .5mm deep recess, then countersink? Or is there a tool that will do it in one step?

Thanks for any and all input.

Mark Linder

[duluthboat]

I'm away from the shop so I can't give you a source but its one tool. If we don’t have the proper size we grind one.

Gary

[Bill]

We do this alot here at work, as long as the ster is not to deep we grind the c-sink to size and go for it. If needs to be deeper we send out a endmill and have it ground.
Hope this helps, Bill Johansen

[Bill]

jeezz, I can not spell STEP