Summary of the February 17-18, 2007 Work Session
a month off due to bad weather it was good to be back at work on
the locomotive. Eight volunteers came form as far as Erie, PA, and
North Carolina, even with the predictions of more snow.
projects are currently underway.
to the Climax Restoration Project page
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last updated or validated on November 28, 2008
large 8.5 inch diameter bar forging has been rough turned to about 6.5
inches. This is as far as it will be taken down until the old
crankshaft assembly has been pressed apart. Until the size
and condition of the crankshaft-gear hub has been determined, the
prudent thing to do is have patience. With $3,000 worth of
steel hanging in the balance, knowing the final dimensions is very
horn casting was separated from its old shaft by
drilling/boring/pressing it free. This was the first horn
that we have removed that did NOT have its old shaft swelled by cold
chisel grooves. The machinist that fit this horn evidently
got the interference fit correct without cheating.
the photos in the last installment, it was quite evident that the horns
will need to be built up and re-machined to new
tolerance. To make this welding job easier, we made a cheapo
welding positioner out of used flange-mount pillow block bearings, a
very old worn out lathe chuck, and a length of rusty 8 inch channel
iron. Maybe we can get a picture of this work of art that
will also show how it is to be utilized.
Reed Prentice Lathe
mounting of the 12-inch four-jaw
chuck was completed, and a test piece was turned on Saturday.
See draw-bar pins for details
main locomotive frame and the auxiliary
tank frame are linked together by a 4-inch by 6-inch chunk of steel
called a draw-bar. Both ends of the draw-bar are secured by
2 5/8 inch diameter pins, with heads on the top ends to prevent them
from falling out.
pins were turned this weekend, from material (most likely 1045 carbon
steel) salvaged from the old square shafts that we are
replacing. One pin was machined entirely by a beginning lathe
hand that had never operated an engine lathe, or any other machine
tool. The second pin was turned by a very seasoned machinist
as a test piece to evaluate our just-up-and-running Reed Prentice
lathe. The guy says that there is something badly wrong with the lathe,
but that he will gladly buy it. Don’t believe even
one word of
his evaluation, as he has an identical
his garage at home!
forgings for the new square shafts are in
hand in the restoration shop. The forge shop completed and had them
ready for pickup in less than three weeks from the day they were
ordered. They were quite a load for a Toyota pickup, but it
rode quite smoothly.
dimensions are: approximately 5 1/4 inch square by 17 inches
long on the square portion, and 5 ¼ inch diameter
along the rest of their length. The squares will finish at 4
¾ and the rounds at 4 ½ inch.
morning the shorter of the two forgings was mounted in the lathe, and
the round section was roughed to within 1/10th of an inch of the finish
size. Three cuts were required to “clean
up” the round area. After adjusting the tailstock
alignment just once, the lathe was cutting only 0.005 inch
taper in about three feet. NASA would not
approve, but this is not at all shabby considering the function of the
transition from round to square at this point is just roughed in as a
series of steps. When the turning is finished, the transition
will be a smooth curve, turned with a very simple home-made radius
turning attachment that will be clamped into the toolpost.
Fitzgibbon has posted several more photos on the Practical Machinist
Web page at practicalmachinist.com.
forgings to be machined to replace the old , worn, and severely rusted
square shafts of undetermined age and soundness that were on the
locomotive at the beginning of the project. The square
will finish at 4 3/4 inch; the round section at 4 1/2
inch. (Photo by Grady Smith).
Arthur ready to take the initial cut on the round section of the
shorter of the two new square shaft forgings, in the newly donated and
activated Reed-Prentice engine lathe.
by Grady Smith).
cuts have been made on the short forging , and the diameter is within
1/10th of an inch of the finished size. Wooden blocks under
right end of the stock will support the weight of the piece for two
weeks, until the next work session. The tailstock spindle has been
retracted from the work slightly, to prevent the ball bearing center
from taking a "set," or warping from being strained in one direction
(down) for a long period of time. (Photo by Grady
rough-stepped transition from round to square. This will be a
smooth curve on the finished piece, and will reduce the likelihood of
the forging breaking at this point. (Photo by Grady