> I have the same Shay that had the same issue before I got it.
> {snip} until the late Bill Daiker fixed and painted it for Howie.
> Now I am not sure what Bill did to fix it.
> Bill Lane
PBL's Shays were just another example of a plastic gear press fitted onto a
metal shaft. With age, the plastic became brittle, outgassed, shrank and split
-- rendering the drive useless. PBL contracted with NWSL to have replacement
gears made which he sold for about $6 each. The replacement gears also had a
plastic gear fitted onto a metal shaft, but the plastic (nylon?) was stonger,
better, etc. or maybe the press fit was less strenuous.
All of that was back in the 1980s. Today, loco makers are still press fitting
plastic gears, u-joints, etc. onto metal shafts and having the same old
problems with splitting after time. Sure would be nice if a splined shaft or a
flatted shaft were used with little, if any, stress on the plastic from the
press fit.
Maybe the next decade will see some improvements. Ignoring history means it
will be repeated.
Hoping.....Ed L.
www.sscale.org
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