The Irish Railways 3d printing thread

[Rob R]

A bit more percieved wisdom picked up from various sources.

Print a groove around the outside of the rim and fit into the rim with a smear of epoxy.

Apparently some loctites can react to the 3dp plus shrinkage issues.

[Horsetan]

On 18/5/2026 at 2:13 PM, Northroader said:

Nice update, I did do some long time ago, so good to see how it’s done now. My main struggle seemed to be with keeping the mould flat and level whilst casting, then getting the cast part to have a uniform thickness after the pour.The catalyst for the rubber mix back then was also requiring a terrible level of care in its use, hope that’s improved? Certainly the results would be an easier thought process than mastering 3D printing.

Some people use LEGO bricks to form the moulding box