If you remember the pony truck was missing a wheel. Rather than take the sensible option of just fitting a pair of 12mm wagon wheels (Romford would suit) I decided to turn up a pair from brass. I started by turning two discs to the correct width and flange diameter, drilled 3.8mm for the insulating bush. These were then mounted on a mandrel and a step turned for the tread, leaving .1mm on the dia.;
With my compound slide set to 3 degrees the cone angle was turned on the tread;
After which I profiled the flange using a graver and my watchmakers tool rest, working by eye. Then the recess in the front of the wheel could be turned, to match the original wheel;
Job done;
I chose to blacken the wheels, and I was going to paint the inner face but I like the finish as it is so I've left them in blackened brass. I turned new stepped axles from 3mm silver steel. The original axle was 2.5mm, and a sloppy fit in the pony truck which is drilled, badly, 3.2mm(ish). I could have fitted bushes to the truck, drilled after fitting, and I may yet go back to that idea.
Here's the wheels fitted, with the old wheel and the fixing rivet;
Insulating bushes are turned from Acetal, and I probably should have sourced a length of red to match the old bushes.
The pony really is crude, just a bent piece of metal, surprising really as the company made decent quality die castings;
Here's the truck fitted, with the tension lock coupling attached;
I don't think the new wheels look too out of place.
Pick-ups next, then testing.
Paul.
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