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What does your finish need to be?
I'm not gonna do the math, is it a particular taper?
i did a tapered off center[center of top was not same as center of bottom] hole on a bunch of parts for a friend years ago. Ball end mill, lots of coordinates, lousy finish
CAD/CAM is the way to do it
What are you talking about... it's only three lines of code to make a tapered hole. Z -38.0, and A-10.0, and then a B 360.0
not a vertical hole
He's programming for a 5 axis machine.
spoiled kid.
Given my experience if you are trying this in a three axes milling machine, and you need a finish better than a 120(not sure what that is in metric)your going to need to get a custom solid carbide tool made. First come in with an insert drill that will leave stock for the minor diameter. Next rough the taper in the hole with a ball mill by just stepping it down say .5mm or something, just doing simple circles with decreasing diameters. Than come in with the finish tool. if you have a lot of parts/holes you may want to get 2 finish mills, one to semi rough the part, the last to just kiss it and bring it in to tolerance. Be sure your grinder leaves enough flute on the tools to allow you to change your offsets without milling a straight/rubbing the shank as you get your setups dialed in.
I hope that is helpful.
Our shop makes some steering rack linkages assemblies that have taper holes in both faces(5 each part). Mat. is 4140 heat treat. We have done this on 1000s of them. They assemble like clockwork all day. Your nominal dimensions are really close to what were doing.
They wont get a tool made as it is a one off
Had to take out that last g03 lead out of circle as the cutter was stepping in to the taper half way down. Now it works fine perfect finish running at 3300rpm f700 .perfect finish and not a single tool mark.
Need help machining a tapered hole starting at 28mm dia tapering to 19 dia 38 deep. Am using fanuc 18i control and thinking macro or g code . Any sample will do. Cheers mick
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