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Railway turntable — N development view — CAD render, not a physical print
Digital model In development

Configurable Railway Turntable

Revision 0.2

An N/H0 turntable prototype with standard-size bearings, end rollers and provision for a belt drive and position sensing. Development package v0.2; mechanical operation remains untested.

Scale profiles: N · 1:160 / H0 · 1:87

Delivery
Digital files
Updates
Versioned releases
Licence
Personal use

Development preview — this model is not available for purchase yet.

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Explore the details and the parts behind the model. Select an image to open the larger view.

Railway turntable — H0 development view — CAD render, not a physical print
Railway turntable — H0 development view
Railway turntable — N mechanism cutaway — CAD render, not a physical print
Railway turntable — N mechanism cutaway

Model details

Railway infrastructure · N 1:160 and H0 1:87 · Development package v0.2

A turntable designed around real model hardware.

This configurable turntable is a separate mechanical project coordinated with the Probstzella Configurable Roundhouse. Its full-size bridge dimensions and miniature hardware are defined separately, so changing scale does not also shrink the bearings, motor or mounting clearances.

Development preview — not available for purchase. This is an original model-railway mechanism, not a measured reconstruction of Probstzella’s historical mechanism or its larger modern turntable pit.

Two generated scale configurations

The supplied study uses a nominal 16.5-metre bridge: approximately 103.13 mm in N and 189.66 mm in H0. Track gauge is 9 mm and 16.5 mm respectively. Check the intended locomotive’s wheelbase and stopping margin; these dimensions do not guarantee that every locomotive will fit.

Support and automation provisions

  • Two spaced 608 radial bearings guide an 8 mm shaft.
  • An F8-16 thrust bearing carries the central vertical load.
  • Two 623 end rollers run on a separate race insert to help support the bridge under changing load.
  • Separate motor support, belt-drive envelopes and adjustable mounting slots.
  • Provision for position and home sensing, with wiring passages and a planned flexible cable loop.

The design aims to limit tilt and vertical movement, but stiffness, loaded alignment, friction and repeatability have not been physically validated. Motor, pulley, sensor-module and fastener choices remain provisional; their CAD envelopes are not a guarantee of compatibility with a particular purchased component.

What the current development package contains

v0.2 retains the v0.1 mechanism geometry and adds an illustrated English assembly guide, numbered diagrams and a parts inventory. There are 21 prototype STL file types per scale; the track receiver is used repeatedly in the supplied layout. Editable Python source, digital assembly views, fit coupons and an offline indexing planner are also included in the development package.

Important operating limits

There is no slip ring, finished controller firmware or proven DCC installation. The current design assumes limited-angle movement rather than unrestricted continuous rotation. Track polarity management, safe alignment detection, cable movement and loaded running tests must be resolved before use.

All displayed views are digital model renders or clearly labelled setting illustrations, not photographs of an operating prototype. Physical printing, slicing and mechanical operation remain untested.

Before it reaches your workbench

A few useful things to know.

Is this a physical model?

No. This catalogue is for digital model files, not a printed kit. When a release is available, its listing will describe the files and documentation included in the download.

Which scale and printer should I use?

Check the model details and release notes for the available scales and tested print settings. Use a scale-specific version where supplied: small features and assembly clearances do not always work when a model is simply enlarged or reduced.

Does the picture show a finished print?

Model previews may be digital renders. Refer to the image description and release notes to distinguish a digital model from a physical print test. Development previews are not a promise that every part has been printed.

What should I keep after downloading?

Keep a backup of the original release package together with its version number, licence and assembly notes. Read the instructions before arranging the parts in your slicer.