This listing provides a single HO (1:87) master STL of a riveted-steel steam traction engine adapted as a crane — the steam-powered excavators used on early 20th‑century worksites. Key preserved features: longitudinal riveted boiler rows, vertical smokestack, large spoked rear driving wheels with smaller front wheels, side-mounted flywheels, engine/cylinder housings, and a straight lattice/plate boom with top pulley and hanging clamshell grab. The hanging grab is attached with a small loop so modellers may trim and remount if desired. The master STL is designed for reliable hobby printing: rivet rows are raised for washes, spokes and boom geometry are thickened slightly to reduce breakage, and fragile tiny text/labels have been removed. Included: 1 x master_ho_1-87_traction_crane.stl and README.txt with conversion instructions (scale uniformly to match other scales) and recommended slicer parameters. Recommended print settings: 0.12–0.2 mm layer height, 0.4 mm nozzle, supports under boom/pulley or use tree supports, 2–3 perimeters, 15–25% infill for durable handling. Suitable for Edwardian dioramas, HO model railway sidings, quarry scenes, and historical displays.

Available railroad scales: Z (1:220), N (1:160), HO (1:87.1), S (1:64), O (1:48)

Ready to print digital download in one piece with no assembly needed.

IMPORTANT: You are purchasing the file in the scale selected below.

Miniature Reality Makes practical, print-ready scenery and vehicles so you can economically fill out the background of your layout, diorama, or tabletop without paying centerpiece prices for everything (Our hobbies are dying because the average person can't afford to enjoy them, we want to help fix that). We want your miniature worlds to feel real and full of life - with more variety, more detail in every scene, and prices that won't hold you back.

Miniature Reality Personal-Use License (No AI / No Resale)

• Allowed: personal printing for your own layouts, dioramas, tabletop games, and personal display.
• Not allowed: sharing or distributing the digital files (free or paid), re-uploading to any site, bundling, remix resale, or selling/redistributing printed outputs.
• Not allowed: using the files (or derivatives) to train, fine-tune, test, or feed any AI/ML system (including dataset creation).
• Not allowed: commercial use of any kind without a separate written commercial license from Miniature Reality.
• Enforcement note: digital files may include purchaser-linked identifiers / forensic watermarking to help investigate unauthorized distribution.