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Tamiya 70203 Low-Current Motor Gearbox (3-Speed)

Pololu item #: 2196 12 in stock
Brand: Tamiya
RoHS 3 compliant

Price break Unit price (US$)
1 18.00

backorders allowed

This gearbox features a low-current brushed DC motor, which is great for projects where you want to keep your power consumption to a minimum. Its single gear train can be assembled to have one of three gear ratios: 12.7:1, 38.2:1, or 114.7:1.

 Description Specs (5) Pictures (9) Resources (0) FAQs (4) On the blog (0) 


The Tamiya 70203 Low-Current Motor Gearbox kit includes one brushed DC motor and all the gears and parts to build any of the three possible gear ratio configurations: 12.7:1, 38.2:1, 114.7:1. The three gear ratio options give you the flexibility to choose the best speed and torque for your project.

Tamiya 70203 low-current 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 and a modeling knife on hand.

Complementary products

The output shaft included in this kit is a 3 mm hexagonal axle that is 10 cm (about 4″) from tip to tip. The axle works with many of the Tamiya wheels we carry. The low-voltage motor runs on 0.5 V to 3 V and draws less than 1 A, making it a perfect candidate for the DRV8835 or the DRV8833 motor driver carrier. The mounting holes on the gearbox are compatible with the Tamiya 70098 universal plate set and other Tamiya construction series products


  • Free-Run Speed @ 3 V: see picture to the right for RPM table

    Tamiya 70203 low-current gearbox torque and RPM at 3 V.

  • Free-run current @ 3 V: 20 mA
  • Stall current @ 3 V: 670 mA
  • Torque @ 3 V: see picture to the right for torque table
  • Three different gear ratios:
    • 12.7:1
    • 38.2:1
    • 114.7:1
  • 3 mm hexagonal output shaft (length: 100 mm) compatible with our adapter for LEGO wheels and many of Tamiya’s wheels
  • Two mounting orientations
  • Transparent gear housing shows the internal mechanisms
  • Crank plates

Note: The Tamiya 70203 Low-Current Motor Gearbox is a kit; assembly is required.

People often buy this product together with:

Tamiya 70105 3mm Diameter Shaft Set Tamiya 70105 3mm Diameter Shaft Set
Tamiya 70168 Double Gearbox Kit Tamiya 70168 Double Gearbox Kit
Tamiya 70188 Mini Motor Gearbox (8-Speed) Kit Tamiya 70188 Mini Motor Gearbox (8-Speed) Kit

Related Products

DRV8833 Dual Motor Driver Carrier
DRV8835 Dual Motor Driver Carrier
Tamiya 70105 3mm Diameter Shaft Set
Tamiya 70098 Universal Plate Set
Tamiya 70189 Mini Motor Low-Speed Gearbox (4-Speed) Kit
Hakko CHP-170 5-1/4 in. Micro Flush Cutter
Tamiya 70188 Mini Motor Gearbox (8-Speed) Kit
Tamiya 70190 Mini Motor Multi-Ratio Gearbox (12-Speed) Kit
3mm Hexagonal Shaft Adapter for LEGO Wheels (Pair)
Pololu Universal Aluminum Mounting Hub for 3mm Shaft, #2-56 Holes (2-Pack)

Related Categories

Tamiya Motors and Gearboxes
Tamiya Gearboxes with 3mm Hexagonal Shafts
Tamiya Products
3mm Shaft Gearmotors
Tamiya Wheels
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