And that was the point I was trying to make about the pilot bushing not
doing much work at all a majority of the time especially when the
vehicle is under way. But there is slight work being done by the
bushing when the engine is running and the clutch is disengaged, it is
keeping the input shaft and clutch plate properly aligned when the
pressure plate is not holding every thing in place. Remember, the crank
shaft and pilot bearing continue to spin whether the input shaft is
turning or not.
With the Portable circular saw there is a similar load but the real load
is so very close to the armature gear and gear bearing that the end cap
bearing basically only has to hold the armature in alignment. The
bearing on the other end of the armature is handling 99%
of the load.
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