< Cab Reverser >
William's cab reverser is screw reverse type
that achieves fine cut-off adjustment. The
problem is lengthy operation. Moreover, in
construction, we have to cut left-handed
screw and nut.
The picture shows my solution. A pair of
gears accelerate and reverse the revolution
of the operating handle. As a result I can
use ordinal M6 screw and can reverse the
engine with 12 turns of the handle.
Fortunately I got a pair of carbon steel
gears. The smaller gear is annealed, threaded
and hardened again.
The reverser stand was cut in the rotary
table. I prefer the method to using hacksaw
and files.
The bearings were cut from carbon steel bar
and silver soldered to the stand. Two round
bars are just for alignment.
The nut was cut from a phosphoric bronze
round bar. Because I didn't have the material
in rectangle shape. The pins were press fitted.
The top cover plate was made from a brass
sheet. After painting I cut a scale with
a tool made from a tip of hacksaw blade.
The handle plate was cut in the rotary table
from a free-cutting stainless steel bar.
The handle is also made of stainless steel.
After rounding the tip, the tapered profile
is turned with a brass bar support.
Parts for the handle unit.
Heat-resisting black paints were applied
to the parts and they were annealed in an
oven-toaster. Don't take out new toaster
from your kitchen, otherwise it should be
spoiled by black smoke.
Assembled with MoS2 paste that assures smooth
operation.
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