Upgrading SW1 Drivelines

Trains

A while back my Soo 320 project SW1 broke a horned ball on it’s front truck drive, while searching for parts I found NWSL had instructions for upgrading the rear truck drive which was somewhat notorious on these models.

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It’s basically a rubberish straw, for a closer look:

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The NWSL solution is to create a cardan shaft between with the standard horned ball/cup arrangement on either end. You start by cutting a 0.250″ long section from a 2mm diameter shaft.

Press fit the cups onto the shaft making sure they are aligned

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And finally installing horned balls on the motor and truck shaft and you’ve go an improved drive (some fiddling about may be required)

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As I have two SW1 (which you  might have guessed from the pictures it was at this point I started working on the second one. I made it as far as pressing the cups on a shaft when it slipped out of my pliers bounced off my forehead and landed somewhere in the room… yet to be found. I don’t expect to find it until long after I’ve given up and cut another one.

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