This license lets others remix, adapt, and build upon your work non-commercially, as long as they credit you and license their new creations under the identical terms.
My Merlin!
Mostly to 10mm scale. Printed on an Elegoo Neptune 3 Pro, with PLA plus filament. Two N-20 motors power the drivers, controlled from the tender by batteries and a small DC motor controller.
This is openSCAD code that can be used to generate a variety of various railway wheels.
Included are some images and sample wheel stls. All the samples are 1/32 fine scale renders. All have been rendered for fine details ($fn=200) other than the Mansell wheel which was rendered with $fn=100 to keep the size of the stl reasonable.
The code can also produce standard wheels in both 1/32 and 10mm scales. Also supported are 3.5in and O gauge by selected the correct "sf" value in the code. The code could be extended to support other scales.
Commercial point levers of the 'lever in diagonal slot' pattern can be self built with various throws as required.
These printed versions (once designed) offer a faster to make alternative and avoid the separate lever rod that often becomes detached in commercial offerings.
Three alternative throws (2mm, 4mm and 8mm) are provided. Others may be added later as reqd. Commercial levers are often 6mm throw.
Suggested print parameters.
Material: PETG
Infill density: 100%
Layer height: 0.1mm
Nozzle dia: 0.4mm
A version of the ubiquitous 16T Mineral Wagon designed to be easy and fast to print and assemble. Almost as easy to disassemble, in order to replace any parts. Can be run with the wheels and axles as they are, or fitted with R144ZZ Bearings at any stage, without any further parts required.
Both Coarse and Fine G1MRA standard wheels and axles included.
Proven out on a Prusa Mk3 i3, in PETG
Here I have enlarged my 08 shunter to Gauge 3, 2.5-inch gauge. I did this some time ago, now final finishing a few things and tidying up the files.
To save space I've added zip files.
Peter D. August 5, 2024
Update July 17, 2025.
As for the motor and gear boxes, let me suggest 600 rpm as a better choice. The 300 rpm will give a top scale speed of 20 mph. The 600rpm should do this at half throttle and allow for battery decay and loads.
This hook has been added following recent requests for a 3d printable one.
Some hooks are contained within various wagon models but this one was designed to replace a Northern Finescale plastic moulded hook.
No doubt laser cut steel hooks are much stronger but this hook when printed in PETG has been found strong enough for most applications.
The examples shown are printed in silver PETG (I would normally use black). Infill was 100%, layer height 0.1mm, a brim was included to aid bed adhesion.
A set of detail parts created by myself to spruce up the Model Engineer's Laser Tram loco kit (see related content)
My take on a SR milk tank wagon at 10mm scale.