Brandenberger
Hot Rolled
- Joined
- Sep 19, 2017
Hi,
I'm working on this Van Norman 22LU universal mill. It is a ~1944
machine.
I've taken off the table and top saddle so far, leaving the lower
saddle and knee. The upper and lower saddle mating surfaces are
nearly pristine, showing almost no wear and original scraping. Interestingly
there were two copper shims in between these parts however.
The spindle runout in the 50-taper spindle shows .0002" runout on the
taper, and .0005" on the spindle face.
The cutterhead face and mating machined and scraped surfaces to the
ram are hardly worn at all, showing the original scraping. I have removed,
cleaned the bearings of the cutterhead and re-installed.
The ram movement forward and backward shows .001" difference over
12 inches or so of ram travel, indicating the mating surface for the
cutterhead.
The column face and knee show considerable wear and scoring. In fact
the knee surface is covered with sheet metal, that was pinned at the
rear and held on at the front of the knee with a strip screwed into the
front of the dovetail. I am trying to assess the impacts of this wear
and decide whether it makes sense to remove the knee, lower saddle and
address them.
When I indicate the column face from the spindle face (sweeping a .0001"
indicator through an arc) I get .0018" difference from left edge to right edge.
Note the cutterhead angle is against the hard stop for horizontal position, but
not itself indicated to confirm the angle yet, since I'm unsure what surface
to use for this so far.
Indicating the lower saddle surface while moving the saddle forward and backward,
I get .0015" difference over about 8" of travel (can do a more extensive test of
this with a parallel, this was a rough check directly on the scraped surface).
I'm working on this Van Norman 22LU universal mill. It is a ~1944
machine.
I've taken off the table and top saddle so far, leaving the lower
saddle and knee. The upper and lower saddle mating surfaces are
nearly pristine, showing almost no wear and original scraping. Interestingly
there were two copper shims in between these parts however.
The spindle runout in the 50-taper spindle shows .0002" runout on the
taper, and .0005" on the spindle face.
The cutterhead face and mating machined and scraped surfaces to the
ram are hardly worn at all, showing the original scraping. I have removed,
cleaned the bearings of the cutterhead and re-installed.
The ram movement forward and backward shows .001" difference over
12 inches or so of ram travel, indicating the mating surface for the
cutterhead.
The column face and knee show considerable wear and scoring. In fact
the knee surface is covered with sheet metal, that was pinned at the
rear and held on at the front of the knee with a strip screwed into the
front of the dovetail. I am trying to assess the impacts of this wear
and decide whether it makes sense to remove the knee, lower saddle and
address them.
When I indicate the column face from the spindle face (sweeping a .0001"
indicator through an arc) I get .0018" difference from left edge to right edge.
Note the cutterhead angle is against the hard stop for horizontal position, but
not itself indicated to confirm the angle yet, since I'm unsure what surface
to use for this so far.
Indicating the lower saddle surface while moving the saddle forward and backward,
I get .0015" difference over about 8" of travel (can do a more extensive test of
this with a parallel, this was a rough check directly on the scraped surface).