I had the opportunity to visit someone new today that's again into small trains .... 'cept this chap is a little different.
He like Mono Rails, has a couple of them from what he was telling me. Well to be truthful he has the largest collection in the world of over 100 trains apparently.
Anyway, a guy that knew a guy that knew a guy that knew me put me onto him for a little job he needed doing. One of his trains needed a tyre change and the new tire didn't fit the hub properly. The tyre in this case is all steel and the old one had a rubber rim.
The Problem: the tyre is the center piece clamped by the two outer rims, except the rims wont clamp fully.
After careful scrutiny it was decided to modify the hub.
For this I mounted the hub in my 8" four jaw as it fit better than my 3 jaw due to larger jaws. Please excuse the state of the chuck, I've yet to clean it up and this is the first time time I've used it. The hub was dialed in to 0.0005 in both directions.


The wheel before machining

You can see here what was taken off in the shiny areas, the hub is cast steel.

The wheel after machining the hub

I realise I haven't taken enough pictures to help show this properly, but I hope you get the jist

One of the bearings in the hub had a dust cover missing, so though I'd make the chap a new one from a bit of SS

Sizing the outer dia

Now the inner


