Quote Originally Posted by mekanik View Post
Would the ring gears on the e-bay links not be better than plastic ?
those listed are cheap enough.
Could you use two spur gears with the correct ratio ?
Epicyclic gears have very specific relationships. To get 3:1 the number of teeth on the ring is 2 x teeth on planet + 1 x teeth on sun gear. Without knowing the number of teeth, circular pitch and tooth form of the Nexus ring gear the chances of finding other gears to suit off the shelf is diminishingly small...