Nastawnica mechaniczna: ława dźwigniowa
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Mechanical interlocking: lever frame

Lever frame (1:5), parts

Model for 3D printing | scale 1:5 | epoch from IIc

Added on 5 May 2024 | Downloaded 2 times

Lever frame (1:5), assembly manual

Assembling manual

Added on 5 May 2024 | Downloaded 4 times

Model for 3D printing of a lever frame with interlocking box, as used in standardized mechanical interlocking (type Einheit) on German and Polish railways. Model contains parts for building a lever frame for 8 or 17 levers and up to 16 interlocking sliders.

Parts are optimized for 3D printing in FFF technique (fused PLA or PETG filament). Selected parts may require printing with additional supports.

Nastawnica mechaniczna: ława dźwigniowa


Some parts might be slightly longer than a print area of typical 3D printer. In such case, parts can be rotated in the slicing software to be printed e.g. along the diagonal of the print area.

3D printing of longer parts

Based on:

  • Album rysunków konstrukcyjnych urządzeń zabezpieczenia ruchu pociągów, tom 2, Wydawnictwo Komunikacyjne, Warsaw 1961. Scans of the blueprints available at (last access: 19th January 2023);
  • Mikulski, A.: Mechaniczne urządzenia zabezpieczenia ruchu kolejowego, WKŁ, Warsaw 1965;
  • Mikulski, A.: Mechaniczne urządzenia zabezpieczenia ruchu kolejowego, 4th edition, WKŁ, Warsaw 1979;
  • photos and measurements of interlocking from the collection of Polish Association of Railway Enthusiasts.

See also

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