Tomy Model Train Track Replacement Parts

My (outsourced) grandson has a decades-old Tomy model railway.  Some of the pieces of track are showing their age with quite a few failures with the male and female track connectors (in particular).

I measured up a few good remaining pieces and have modelled them up in onshape.  The various pieces are parametric in nature - so if you want tracks of different lengths, you can simply change the “TrackLength” variable and the design will update for you ready to export.  The curved track however has a ‘CurveDegrees’ and ‘Curve Radius’ to drive its design.

The onshape document can be accessed and copied from: 

https://cad.onshape.com/documents/e9d5e450d93deeac4b62ca8f/w/8f3a73982067d35412a7857d/e/4a46d0b5b9fe34680242eaa1?renderMode=0&uiState=6778cb8141a4976bfbac9271

I've also included the STEP files for those that want to fool around with them.

The pieces included are:

• a curved track - 45 degree deflection with a centreline turn radius of 200mm,
• a 200mm piece of straight track,
• a 36mm male to male adapter,
• a 36mm female to female adapter, and
• a 36mm straight piece of standard track (a spacer basically).

The included .3mf files show the best orientation in the slicer for printing (basically at 45 deg).  The wheel friction is at its best if the surface lines are across the tracks rather than along it.

The top of the track is different to the bottom of the track as I put extra longitudinal ribs on the bottom of the track to reduce drooping overhangs.  The tracks work perfectly well no matter which side is ‘up’.  They are completely reversible (only relevant for the curved track really).

Printing:

The attached 3mf files contain all the slicing information required (if opened as a project) but the slicing parameters I used were:

• Material: PETG
• Layer Height: 0.2mm
• Layers: 5 top and 5 bottom
• Perimeters: 3
• Infill: 100% Rectilinear

Apologies:

Apologies for not including any actual photos of the pieces I have printed as they contained personally identifiable information about my grandson - but all the pieces fit very well with the original track pieces.