Thingiverse
OO Wide Couplings: X9660, X8031, Dovetail. Hornby, Dapol, Bachmann by MrBunsy
by Thingiverse
Last crawled date: 4 years, 10 months ago
This configurable coupling generator (couplings_parametric.scad) is capable of producing an X8031 (Hornby/Bachmann), X9660 (Dapol/Hornby/Airfix) and Hornby dovetail (hornby's NEM socket socket), with and without hooks.
Usually the real dovetail fixing creates a NEM socket, but I've skipped the middleman and produced a coupling that can slot straight into the Hornby chassis. In my experience, the real dovetail connectors fall out far too easily, especially when pulling a long train. The printed version isn't perfect, but stays in better than the real Hornby ones I've used (when fitted with a wide coupling).
I've uploaded the most useful STL files.
The Dapol coupling will need printing in something flexible. PLA snapped when trying to insert it, PETG worked well. The hooks seem to work best in PLA.
Once the print is slightly cleaned up the hooks should be able to fall under their own weight. This is needed for them to work properly. Often it's sufficient to simply assemble and give the hook a good waggle.
The latest sources are all on github: https://github.com/MrBunsy/3DPrintedTrains
The scad files are licenced under GPL-3.0-or-later
Usually the real dovetail fixing creates a NEM socket, but I've skipped the middleman and produced a coupling that can slot straight into the Hornby chassis. In my experience, the real dovetail connectors fall out far too easily, especially when pulling a long train. The printed version isn't perfect, but stays in better than the real Hornby ones I've used (when fitted with a wide coupling).
I've uploaded the most useful STL files.
The Dapol coupling will need printing in something flexible. PLA snapped when trying to insert it, PETG worked well. The hooks seem to work best in PLA.
Once the print is slightly cleaned up the hooks should be able to fall under their own weight. This is needed for them to work properly. Often it's sufficient to simply assemble and give the hook a good waggle.
The latest sources are all on github: https://github.com/MrBunsy/3DPrintedTrains
The scad files are licenced under GPL-3.0-or-later