Is this 3D model free to download?

Yes, TTn42 / QR120 SX Bogie and Chassis is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Thingiverse. Use the "Download from Thingiverse" link on this page to open the original listing and grab the file, or save it to your print queue in the free Thinger app.

Designed by QR_Phil, published on Thingiverse. Please credit the creator when sharing your print.

Can I print this at home?

Yes. This is a printable 3D model intended for home FDM and resin printers. Check the original listing for suggested print settings.

TTn42 / QR120 SX Bogie and Chassis 3D printable model by QR_Phil

TTn42 / QR120 SX Bogie and Chassis photo 1

TTn42 / QR120 SX Bogie and Chassis photo 2

TTn42 / QR120 SX Bogie and Chassis photo 3

TTn42 / QR120 SX Bogie and Chassis photo 4

TTn42 / QR120 SX Bogie and Chassis

Source: Thingiverse by QR_Phil

The TTn42 / QR120 SX Bogie and Chassis is a free printable 3D model from Thingiverse by QR_Phil. Modified for TTn42/QR120 scale using Graham Farish N Scale 3'6" coach wheels with 15.2mm axles and Micro Trains 1015 couplers. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

30 saves Source: Thingiverse Updated 2026-11-02 Filament: 37 g License: CC-BY-NC · non-commercial Category: Other

Tags: NZ120, QR120, Queensland Railways, TTn42

About this model

Modified for TTn42/QR120 scale using Graham Farish N Scale 3'6" coach wheels with 15.2mm axles and Micro Trains 1015 couplers. Tested on my R315mm track shows it looks to work for these tight curves and should run down to R282mm curves. The under frame has been reduced by 0.9mm in height to get the buffer centers close to the correct scale height. The model now sits very close to the correct scale overall height. The Chassis appears to be identical for the SX coach and SXV guards van. Add 10 grams of weight to get the model close to the NMRA recommended 37 grams (for N scale). Print the Bogie and Chassis at 100% scale for 1:120 scale. For filament printers, all parts must be printed with a 0.2mm nozzle and a line width set to 0.18mm for better detail. (i.e. default setting will not print t…

Frequently asked questions

Is this 3D model free to download?: Yes. TTn42 / QR120 SX Bogie and Chassis is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link above to open the original listing.
Where is the STL hosted?: The download is hosted by Thingiverse, not by Thinger. We link you directly to the original listing by QR_Phil.
Who made this model?: Designed by QR_Phil, published on Thingiverse. Please credit the creator when sharing your print online.
Can I print this at home?: Yes. This model is intended for home FDM and resin 3D printers. Check the original listing for suggested print settings like layer height and supports.