120:1 Mini Plastic Gearmotor, 90° 2mm Spline Output

Pololu item #: 1123 278 in stock
Brand: PCX

Price break Unit price (US$)
1 5.49
10 4.95
50 4.67

backorders allowed

This compact, inexpensive, low-current gearmotor (brushed DC motor with a 120:1 reduction gearbox) is well suited for use in small robots. At 4.5 V, it has a free-run speed of 120 RPM and a stall torque of approximately 20 oz-in (however, the built-in safety clutch might start slipping before the stall torque is reached). The splined output shaft has a crest diameter of 2 mm and is perpendicular to the motor shaft. Though the product picture shows two gearmotors, this product is for a single motor.

Alternatives available with variations in these parameter(s): shaft type free-run speed @ 4.5V extended motor shaft? Select variant…

 Description Specs (11) Pictures (1) Resources (2) FAQs (1) On the blog (0) 


Size: 54.5 x 20 x 13.8 mm1
Weight: 19 g
Shaft diameter: 2 mm2

General specifications

Shaft type: 90° 2mm spline
Typical operating voltage: 4.5 V
Gear ratio: 120:1
Free-run speed @ 4.5V: 120 rpm
Free-run current @ 4.5V: 80 mA
Stall current @ 4.5V: 800 mA
Stall torque @ 4.5V: 20 oz·in3
Extended motor shaft?: N


See drawing for detailed dimensions.
Measurement is diameter of spline crest.
Note: the gearbox's built-in clutch might start slipping at a lower torque.

Related Products

120:1 Mini Plastic Gearmotor, Offset 2mm Spline Output
180:1 Mini Plastic Gearmotor, Offset 3mm D-Shaft Output
180:1 Mini Plastic Gearmotor, 90° 3mm D-Shaft Output
120:1 Mini Plastic Gearmotor, Offset 3mm D-Shaft Output
120:1 Mini Plastic Gearmotor, 90° 3mm D-Shaft Output
2mm Shaft Adapter for LEGO Wheels (Pair)
Pololu Qik 2s9v1 Dual Serial Motor Controller
DRV8833 Dual Motor Driver Carrier
DRV8835 Dual Motor Driver Carrier
TB6612FNG Dual Motor Driver Carrier
Solarbotics GM7 120:1 Mini Gear Motor 90 deg. Output
Orangutan SV-328 Robot Controller
Baby Orangutan B-328 Robot Controller

Related Categories

Mini Plastic Gearmotors
Motors and Gearboxes
Solarbotics Wheels
Brushed DC Motor Controllers
Brushed DC Motor Drivers
Robot Controllers
Pololu Metal Gearmotors
Log In
Pololu Robotics & Electronics
Shopping cart
(702) 262-6648
Same-day shipping, worldwide
Shop Blog Forum Support
My account Comments or questions? About Pololu Contact Ordering information Distributors