I have a new to me Hz mill. In the package were three arbors, one 1" and
two 1 1/4". This mill, a Dufour, French made, has two round shafts for the
arbor support like a K&T. The arbor support hole is 2" bushed to 1 3/4"
with an oillite or brass bushing, Within this bushing is a roller bearing
that has a bore of 1". So I'm assuming that when running the 1" arbor I
set up the spacers and cutter as needed and put the arbor nut on the outside
of the roller bearing using the inner race of the roller bearing as the last
spacer.
When setting up the 1 1/4" arbor I'm assuming that the roller bearing is
removed and that the bushing on the end of the arbor runs in the brass
bushing.
Some of my confusion is coming from looking in the catalogues and finding
that the running bushings on the arbor are standard at 1 5/8" or 1 7/8" OD.
Do most arbor supports have a plain bushing to support the arbor? Or are
rolling element bearing common?
thanks in advance
lg
no neat sig line


Most arbor supports I've seen use a plain bearing (bronze bushing). Do your
arbors have reduced size pilots on the end to run in a bearing?

Using the ball bearing locked into the arbor spacers might give you some
problems as the arbor heated up.

Who knows, though. After all, you did say the mill was French.....

John Martin