I did some tapered bores in a billet aluminum intake manifold I made
for a Jaguar engine with a Wohlhaupter. I boring head I used had
several radial feed rates one of which when combined with the vertical
feed on the mill happened to give the taper I needed. Not ideal, but
it worked. I just reversed the mill motor at the end of each pass.

Mike Henry wrote:
You are probably thinking of the Tree boring head, which does tapers. So
far as I know the UPA series of Wohlhaupters does not. They are things of
beauty, though.

"Grant Erwin" wrote in message
...
Buy a Wolhaupter boring head on ebay? Those things can bore a taper, I
believe.

GWE

Lloyd E. Sponenburgh wrote:

I'm working on a mould that has a platen with nine cavities. They're
simple holes 2" deep and 1-3/4" i.d., but need to have 5-thou per inch
taper, top to bottom (increasing).

I can buy a taper reamer -- OOF! $300 bucks; but this is a one-off job.

The platen plate is too large to put on my rotary table, and mill the
cavities to a taper. I could reach some of them, but others would
interfere with parts of the mill.

I don't know anyone locally who has a lathe big enough to swing the
platen.

I can, but would hate to, make tapered sleeves and press them into the
platen on what amounts to a disposable device. It'll probably only be
in service two or three months before its replacement machine is
finished.

Any suggestions are darned welcome!

LLoyd