Logan/Powermatic
11x24 lathe
2
1/4" – 8
spindle w/ 1 3/8" hole thru spindle (takes 5C collets). New
headstock bearings, new Poly-Vee belt. Back
gears operation is smooth, quiet, and all teeth are in EC.
Thoroughly
cleaned, gibs
re-lapped, mostly disassembled and carefully painted
metallic green with a top coat of clear
polyurethane.
It’s not Imron (not
about to put my health
at risk), but is reasonably durable and looks great.
A
dial
indicator on the bed shows 0.002" of wear along its length (it came
from a
school), but there are a number of dings on the bed (it came from a
school).
The 0.002” wear is
more
even
than not over most of the bed (no headstock “dip”). Most used lathes have .010"-.030" of wear, so .002"
is almost nothing.
Quick-change
included, but one of the handles needs to be bored out for a new
bearing
insert—the handle shaft ovaled it out. Or
you could try JBW first. I
have enough of the gears to do basic
threading needs (8tpi to 24tpi or so).
I have a set of half-nuts,
but they are almost worn through and
either
need replacing or the babbitt trick. It's
not a hard repair; I'm just out of time and don't really need it,
because...
The
leadscrew is powered by a 1/4 HP
DC motor, Dayton variable speed drive, and Boston Gear speed
reducer. This
controls
feeds for turning, like a
Hardinge or
Monarch. Smooth drive, loads of torque,
adjusts with the turn of a knob, and change speeds on the fly -- a
super-quick-change. Every lathe should have one of these,
IMO.
New
cross-slide leadscrew fabricated using high-precision ACME rod
and a high-precision bronze nut, and a Martin gear. Backlash is
only 0.015" and
could probably be reduced even more w/ a thrust bearing next to the
handle.
Tailstock
is from an 11” Logan (#2MT, more travel than the stock
tailstock). Quill is smooth and tight. Live
and dead centers, Jacobs chuck.
Brand
new
Bison 3 jaw 8” chuck (2 piece reversible jaws), smooth scroll
and
in perfect
condition, with 8” Bison threaded backplate (new, unmodified). Faceplate. Whiton
10” 4 jaw chuck, jaws in EC,
mounted. I like big chucks since I usually "run out of chuck"
before running out of swing. (Yep, they fit fine, and the added
weight
is small
compared to the cutting forces).
Phase
II
100 series QCTP set w/ the usual toolholders, cutting bits/blade (most
new),
and 9” APT (USA) boring bar for carbide inserts.
Custom
high-stiffness stand:
4” square
tubing
for the main beams and 2” square for the rest.
Rough calcs show the 4x4
tubes have about 6x to 8x more
torsional stiffness
than the bed, to minimize chatter and ensure alignment.
For dampening, the
4”
tubes can easily be filled w/ sand.
Footprint is
42”x22” and I made the spindle a little
higher than usual
to save the back, measures 46” CL to floor. The stand
is extremely stiff but not very heavy, so transport should not be
difficult. In fact, the whole lathe easily breaks down into
pieces; the heaviest single item is the bed at around 120 lbs.
See My Projects page for more
details on the process.
I’m
guessing I’ve put about 500 hours into the lathe, so would
like
it to go to a
good home.
The rest of the shop:
Brazing-Cutting
Torch w/ Tanks
Mother-lode of Endmills
~170
endmills in custom wood chest w/ 4 drawers.
From the machine shop of a local factory
that closed.
Mostly USA: Putnam, DoAll,
TRW.
Huge variety, all sizes, full
set of corner-rounding bits. Some freshly resharpened, most EC. Probably
$2000+ new. $150
4x6 Metal Cutting Bandsaw
