Gearing up

My gears arrived today. I ordered three packs of plastic Stevens International hobby gears from https://hobbymasters.com/ :

  • Crown gear set (SVM-101)
  • Pinion gear set (SVM-102)
  • Worm gear set (SVM-103)

All of them say they have an inner diameter of 1.9mm, so I also bought some 2mm steel rods on Amazon (pictured, left). Sorry about the quality of the mise-en-scène; I got excited and opened them before I remember to take the picture. Anyway, the crown and pinion gears mesh really nicely together. The worm gears have three different pitches to them, and only one of them meshes with the other pieces, so that’s a little odd. But they fit snugly on the 2mm rods, so I’m hoping they will be the solution to the problem of how to transfer power from the vertically-rotating motor shaft to the horizontal axle.

I’m also currently moving all the coils to a new plywood engine block that has the appropriate hole in the center for the 2mm shafts (the Erector set shafts I was using are 4mm).

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