O-Gauge Powered Truck for 3D-Printed Locomotives

O-Gauge Powered Truck for 3D-Printed Locomotives

This is an O-gauge powered truck designed specifically for custom 3D-printed O-gauge locomotives. The truck is intended for use with 1:48 scale locomotives approximately 322 mm long, 68 mm wide, and 95 mm tall. The design uses commonly available bearings, and motors, making it well-suited for hobbyists building fully functional custom locomotives.

Truck Dimensions

• Overall height: 31 mm (to bottom of locomotive body)
• Width: 53 mm
• Length: 71 mm

Body Mount

• Body ring through-hole: 52 mm
  • Designed to fit a 52 mm body opening perfectly

Wheel Specifications

• Scale: 1:48
• Wheel tread diameter:
  • 21.15 mm at the tire
  • Tapers to 17.15 mm
• Wheel thickness: 7.5 mm
• Wheel bore: 7.2 mm

Flange

• Flange diameter: 27.15 mm
• Thickness:
  • 1 mm at the flange
  • Tapers to 2 mm at the tire

Axle Specifications

• Axle diameter: 8 mm
• Axle length: 52.5 mm
• Distance between wheel flanges: 25.50 mm

Stepped Axle Features

• Wheel mount step:
  • 7 mm diameter
  • 8.5 mm long
• Bearing step:
  • 6 mm diameter
  • 5 mm long

Drive System

• Gear train:
  • Two 16 mm, 16-tooth gears
  • One 30 mm, 30-tooth gear
• Or Gear train:
  • Two 12 mm, 12-tooth gears
  • One 34 mm, 34-tooth gear
• Gear bore: 8.2 mm

Bearings

• Type: 6 × 10 × 3 mm ball bearings
  • 6 mm ID × 10 mm OD × 3 mm thick
• Quantity: 6 bearings per truck

Motor

• Motor type: TT motor
• These motors are widely available online and commonly used in hobby and robotics applications.