Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Why did you not use set screws on pulleys? You did a great job
showing all the details that went into making the Vertical Transmission.
I enjoyed every minute of this build.

Carl I've used 3mm ones on all my other builds, but they can be a PITA. I've had slotted ones break a half a slot off. Allen key ones get rounded and they are a headache then to remove.
I've bought some recently from an automotive shop and they are supposedly better quality. I'll give them a try and if they are, it will be easy to drill and tap and use them in these two builds.