1:29 Scale Southern Pacific EMD SD9 Locomotive

admin | 04.03.2026

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The 1:29 Scale Southern Pacific EMD SD9 is a high-quality 3D printed locomotive model.

Key Features:

  • All components, including the body and trucks, are 3D printed.
  • Utilizes two USA Trains R22-422 three-axle motor blocks.
  • No additional hardware or electronics from USA Trains are required.
  • Recommended printing layer height is 0.10mm for optimal detail.

Materials Needed:

  • 8 MF63ZZ flange ball bearings (3x6x2.5mm).
  • 2 USA Trains R22-422 motor blocks.
  • M3 and M4 bolts in various lengths for assembly.

This locomotive features a unique “center pivot” design for the trucks, differing from USA Trains' standard mounting. The axles ride in stainless steel roller bearings epoxied into the 3D printed side frames. Metal foil is applied to reduce wear on contact surfaces. Trucks are secured to the base using M4 bolts and washers.

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Information
  • Author: admin
  • Date: 04.03.2026
  • Category: Auto & Moto
  • Views: 25
  • Downloads: 393
  • Likes: 0
  • Images: 131
  • Files: 41

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