Chiaphua Gear Box

[mzitz2k]

(1) If one were to use a Chiaphua motor for the gear box, would it be necessary to support the end of the output shaft (from the motor itself). I have seen several other designs here on CD that have Chips as part of their gear boxes and I haven't seen any gear box that supports the end of the shaft. I tore apart a Chip and noticed that there were two bearings (one on each end), hence a third bearing would break Woodie's old law - avoid odd numbers of bearings in a line.

(2) Also, on many of these designs that I spoke of earlier, I have seen output shafts that continue past the gear box's aluminum plates. I assume teams are connecting a sprocket to these shafts, but just outside the gear box. So, my second question is: Is it necessary to put a third bearing in line (outside the gear box) so that the sprocket doesn't cantilever the shaft? Again, if the answer is yes, it would be breaking Woodie's old law.

(3) Thirdly, have teams found bronze bearings or the usual bearings best for supporting the shafts in the gear boxes?

Thanks