My supermax mill has both a vertical and a horizontal spindle.
Unfortunately the outboard spindle support for the horizontal spindle
is MIA. I want to make one. I can pretty well figure how to machine a
hunk of steel for the support (wish i had a hunk of grey iron)
What should I use for a bearing? Are these just a bronze or brass
bushing? I think a timkem and race and housing is too large a
diameter, it must be smaller than my cutters.
Normally they ( bushing ) are bronze or brass, with a tapered OD, and =
are slitted once lengthwise--and they mount into a corresponding tapered =
hole in the outboard support......usually, there is a key slot and pin =
to keep them from rotating and there is also an adjusting nut that =
serves to draw it deeper into the taper thus reducing the inside =
diameter as the nut is tightened.
There will also be provisions for lubrication, toilet seat and wick, or =
an actual hollowed out reservouir in the housing along with a bulls-eye =
sight glass and fill plug.
In use, you want to adjust for a thousands or so of oil clearance, maybe =
a 8little less but be careful--if you get it too tight or go without =
sufficient lubrication then things can go to hell pretty quick.
You need a "sleeve" ( which is the name of the part that that mounts =
onto the arbor itself ) for each arbor size that you want to run, IE one =
with with a 1.5 hole, one with a 1-1/4 hole and so forth...
FWIW, it's even better if have a pair of supports....
"overarm support" + "milling machine" is probably going to be your best =
bet so far as keyword searches are concerned....
Suggest leave final boring for the very last, and finishing in-place if =
possible--install into the support and then, using a criterion type head =
in the mill spindle and mounting it close-in, feed the entire overarm =
towards the boring head by pushing it along with the table cross =