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Spares for discontinued toys and scale models

The missing piece from an old toy, a train, a model or a discontinued kit, reproduced in 3D. Including what to know about child safety.

5 min read

A toy put away for twenty years and brought out for the next generation almost always comes back incomplete: a wheel is missing, a figure has lost an arm, the wagon coupling has snapped. Nobody has made that part in two decades, and often the whole toy is not worth what buying it again on a collectors’ market would cost.

What reproduces well

  • Wheels, axles, couplings and buffers for model trains and railway layouts.
  • Parts and accessories for construction systems and articulated figures: hands, helmets, tools, bases.
  • Pieces from discontinued model kits that arrived broken or went missing during assembly.
  • Gears and mechanisms in clockwork, battery and mechanical toys.
  • Bases, plinths, displays and stands for collections and dioramas.
  • Accessories and conversions for wargames and miniatures, where resin gives detail FDM cannot reach.

FDM or resin, in this particular case

Here the decision is clearer than in almost any other application. If the part will be handled by a child, or has to carry something — a wheel, a coupling, an axle — FDM in PETG: standard resin is brittle and a thin part snaps when dropped. If the part is for a display case, has fine detail and nobody will stress it — a figure, a miniature accessory, a diorama piece — resin, which goes down to 0.025 mm layers and captures detail FDM cannot.

The visible part, and colour

On a toy or a model the part is almost always visible, so finish matters more than on an appliance spare. Two things help a lot: dropping the layer height, which on small parts barely costs anything because the total time stays short, and accepting that the exact colour will not match. If the shade matters, printing in grey or white and painting beats hunting for the right filament — and a small part paints up nicely with very little effort.

Can you make a part compatible with a branded construction system?

To complete your own set, it is a normal and frequent job. What we do not do is reproduce branded parts in quantity for sale, which is something else entirely and where trademarks and registered designs come into play.

I only have a photo of the missing piece. Is that enough?

It depends on whether there is anything to measure. If the piece fits into something you still have, that recess gives the scale and the critical dimensions, and the photo covers the shape. If there is nothing to check against, at least one real noted measurement is needed to scale the model.

Will the printed part look obvious next to the originals?

In resin at a fine layer, hardly at all. In FDM the layers show close up, though on a small part at 0.12 mm you have to look. If the piece is visible and it matters to you, sanding and paint are options you can order and they close that gap almost entirely.

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