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Originally Posted by Andy A.
Thanks for the find, these are very attractive.
As an aside, has anyone opened one of these things up? How are they lubricated? Any opinion of the quality of construction and possible durability issues?
Perhaps a little bit more or better lube could help with the noise?
-Andy A.
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I have opened them up. They are not great. The basic problem is that in general for a planetary gearbox to work right, the "AGMA Number" of the gears has to increase over a standard spur gear application. I did not actually have these gears checked, but my experience tells me that the gears are an AGMA number lower than typical if anything (if I had to guess, I would say the planets look like extruded pinion wire processed on a screw machine -- not ideal).
The only way go to get lousy gears to even RUN in a planetary gearbox is to increase the backlash -- ALOT!
Add to this that there are only 3 planets per stage and that (with the exception of the final stage) the centerline of the carrier (and that means the sun) is determined by the planets... what do you get??? ...well.. ...This:
Joe J.