[GreenKeys] Gears, gears

[Larry Tighe]

I'm setting up my Model 28RO, recently acquired, on a new RO base.  I've been working the gears between the motor pinion and the main shaft gear in a manner to have a tiny amount of slop between the motor gear and between the gear driving the main shaft.

This took a bit of juggling in order to accomplish the slight play so as to not have the gears tightly meshed.  However, I started to wonder if it is "permissible" to have a metal gear driving a mainshaft fiber gear.....a bit noisey.  

Is there a "rule" about nylon to nylon or not metal to nylon???

lar