What is a "Round Ram" bridgeport milling machine. Someone has offered
one for $100.00. There are no collets and the seller is not sure if they
can be bought. It also has a 440 3 phase motor. Any input would be
great, thank you
The early models of BP had round rams instead of the heavy cast one with
which you may be familiar. The fact that it's a round ram, therefore,
tells you that this is an old machine, but it would have to be in pretty
poor condition to not be worth $100. Unless it's rusted, or worn out
terribly, I'd suggest it's a good deal.
I don't know if the old machines used something different from the R8
collets, but, if so, you could likely find some on ebay. You might have to
be patient, but almost anything you may want shows up eventually.
The motor likely can be hooked up for 220V, but you're stuck with the 3
phase as it sits. You could buy a static 3 phase converter, which would
work well enough for hobby use. One sacrifices some of the HP when running
I have a round ram with a step pulley J head with a 220V 3 phase pancake
I also believe that they came with the M head. I have had no trouble with
the machine holding tram and it works great.
The entire ram is geared and can rotate the head along the x axis. It has
come in quite handy when I had to cut slots at a angle. I have also used it
to rough in dovetails.
I believe the head determines what collets it will use. Mine use standard R8
I paid considerably more than $100 but yours would be worth looking at. You
may find a diamond in the rough.
we have one at work we are still using. uses the R8 collets. the only thing
that I can think of that is a bad thing with it is the head can't be trammed
in the short (y) axis. the table was rescraped by a professional about 14
years ago and we only tilted the head one time since then.
Mine came with a 220 single phase motor that I believe is original...lucky,
I guess. It has B&S #7 taper which works well for the light work I do.
Most of the tooling is shop made, which can and maybe should be done in a
hobby environment. If it's really worth less than $1000, maybe I shouldn't
take such good care of it!
I think some M head machines came with #2 Morse taper?