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Four yellow gear motors with dual shafts and red wires

yahboom

yahboom Gear TT Motor DC 3-6V Dual Shaft 248RPM Ratio 1:48 4PCS

SKU CH-1F4Z-MZMA9

Four DC gear motors with dual shafts deliver 248 RPM at a 1:48 ratio for DIY robot chassis

  • 4 motors per pack for multi-wheel builds
  • 248 RPM no-load speed at 3V for steady drive
  • 1:48 gear ratio multiplies torque to 800 gf·cm min
  • Dual shaft design fits wheels and encoders
  • Compact 7 × 2.2 × 1.9 cm body fits tight chassis

Four-pack DC gear motors

This set contains four TT-type DC gear motors intended for DIY robot cars and similar hobby chassis. Each unit runs from 3 V to 12 V DC with a recommended range around 6 V to 8 V. The gear ratio is 1:48 and the no-load speed is rated at 248 RPM at 3 V. The motors are supplied with leads already attached.

Simple wiring and mounting

Soldered leads let you connect the motors directly to a motor driver or battery pack without crimping. The rectangular body measures roughly 2.76" by .87" by .75" and has dual output shafts for wheels or encoders. A common issue is the plastic gearbox stripping if the motor stalls under heavy load or if the supply voltage is pushed well above the recommended range.

Voltage and torque envelope

Operating above 8 V increases speed but reduces gear life and can overheat the windings. At 3 V the minimum torque is 800 gf·cm, which limits the weight a small chassis can pull on inclines. The 1:48 ratio favours torque over top speed, so the motors suit low-speed platforms rather than fast racers. Anti-interference magnets help with electrical noise but do not eliminate the need for decoupling capacitors on the driver.

How it compares

Measured against everything we stock in DC Motor Kits & Gear Sets, at today’s prices. Recalculated every night.

Price $12.99
Cheaper than about 80% of the 12 comparable items (median $19.49).

Specifications

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Questions about this item

How can I confirm the motor is running at the expected 248 RPM no-load speed after wiring it?

Apply 3 VDC and measure the output shaft speed with a tachometer; it should read approximately 248 RPM under no-load conditions.

What comes in the package and what extra items are needed to drive the motors?

The box contains four TT gear motors with pre-soldered leads; you must supply a 3–12 V power source (6–8 V recommended) and a motor driver or controller.

Which voltage version should I choose for a typical 6 V robot chassis?

These motors are rated 3–12 V with a recommended 6–8 V range, so the single version listed works directly with a 6 V supply.

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