SCORED PIVOTS:

SCORED PIVOTS:
Actually any kind of inconsistency on a pivot will cause a problem. Keep in
mind that a clock mechanism operates like a crowbar in reverse. Try operating a
crowbar backwards like this; apply force on the short end of the lever to a load that
you can just barely move. Now add a small weight to the load side and see for
yourself how much effect it has. This power relationship is similar to the power
transfer that occurs in clock mechanisms.
A pivot that is not perfectly round will impede power transfer. A pivot
that is not straight will cause problems : exceptions french clocks and some veinna
regulators. A pivot that in any way impedes end shake will stop a gear train. Always
check endshake under no power and under partial power. A pivot that is bent , even  slightly, will cause stoppage. A pivot that is off center with respect to the gears on
its shaft will cause problems. (power loss) . A pivot that is scored will cause problems
(accelerated wear and reduction of available power) . A pivot that is pitted or gouged
will cause problems( Accelerated wear and power loss) . Any foreign material in the
bushing that comes in contact with the pivot will cause problems (power loss and
possible wear problems). A pivot that is not long enough to have at least some (.010in.)
of its working surface outside the plate will cause problems(lack of endshake or improper
wear). Any rust or corrosion on a pivot is catastrophic; if the clock does run ,
it will be only a matter of months before the pivot and bushing are totally destroyed.