The Tamiya 72008 4-Speed Worm Gearbox kit includes one brushed DC motor and all the gears and parts to build any of the four possible gear ratio configurations: 84:1, 216:1, 555.4:1, 1428.2:1 . The four gear ratio options give you the flexibility to choose the best speed and torque for your project.

Tamiya 72008 4-Speed Worm Gearbox Kit

The kit includes step-by-step illustrated instructions in both Japanese and English. A scanned copy of the instructions is available on the Pictures tab. The kit can be built with just a screwdriver, but the instructions recommend having side cutters, pliers, and a modeling knife on hand.

Features

• One type 260 motor. 
• Four different gear ratios:
  • 84:1
  • 216:1
  • 555.4:1
  • 1428.2:1
• Worm gear (locks the output shaft when the motor is not turning)
• 4 mm round output shaft (length: 100 mm) compatible with Tamiya wheels for 4mm, round shafts and 4mm universal mounting hub.
• Assorted cranks

Note: The Tamiya 72008 4-Speed Worm Gearbox is a kit; assembly is required.