I’m planning a two millimetre axle for the 30-inch pilot wheels. The wheel hub comes out pretty heavy with 3/4 mm walls, but I daren’t go finer. Indeed, I will have to test to see if I can even turn such a fine wall.
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Pembroke:87
Modelling the Canada Atlantic Railway into Pembroke in Proto:87
I’d agree that reaming a 0.75 mm wall is challenging. Boring undersize, then turning the lathe off and using hand power for finishing cuts might help you be gentle.
Thanks for the suggestion, Stephan.