Motor with 20 mm diameter and 41 mm length, 25:1 metal gear, 6 V operating voltage, 0.15 A to 2.9 A power consumption, 570 RPM speed and 1.6 kg*cm maximum torque. Pololu 3462

Motor with 20 mm diameter and 43 mm length, 63:1 metal gear, 6 V operating voltage, 0.15 A to 2.9 A power consumption, 230 RPM speed and 4 kg*cm maximum torque. Pololu 3714

The mountings allow the engine to be mounted on the Romi Chassis chassis. The motor is snap-fitted, which facilitates its quick assembly. The fixings are in pink. Pololu 3521

Pololu 2258

A multifunctional board with dimensions of 120 x 90 cm dedicated to the micro:Maqueen and micro:Maqueen Plus robots. It allows you to implement line tracking scenarios. DFRobot MBT0011

Module with 5 balancing sensors for Balboa 32U4 balancing robot. Pololu 3577

100:1 Micro Metal Gearmotor MP

This gearmotor is a miniature high-power, 6 V brushed DC motor with long-life carbon brushes and a 150.58:1 metal gearbox. It has a cross section of 10 × 12 mm, and the D-shaped gearbox output shaft is 9 mm long and 3 mm in diameter.

A set for building an educational robot based on the popular micro:bit module. It is intended for people over 8 years of age. It allows you to introduce a child to the world of robotics in a simple and friendly way. DFRobot ROB0147

This gearmotor is a miniature high-power, 6 V brushed DC motor with a 986.41:1 metal gearbox, making it a great choice for applications requiring fine control at very low speeds. It has a cross section of 10 × 12 mm, and the D-shaped gearbox output shaft is 9 mm long and 3 mm in diameter. This version also has a 4.5 × 1 mm extended motor shaft.

This gearmotor is a miniature high-power, 12 V brushed DC motor with long-life carbon brushes and a 297.92:1 metal gearbox. It has a cross section of 10 × 12 mm, and the D-shaped gearbox output shaft is 9 mm long and 3 mm in diameter. This version also has a 4.5 × 1 mm extended motor shaft.

A set of two Pololu wheels measuring 40x7mm in red. Fits D-shaped shaft with a diameter of 3mm. Pololu 1453

The mountings allow the engine to be mounted on the Romi Chassis chassis. The motor is snap-fitted, which facilitates its quick assembly. The mountings are in yellow. Polol 3524

Kit for tracks drive construction. It consists of silicone tracks and plastic gears and a set of screws. Pololu 3033

Servo equipped with metal gear and analogue feedback. It is supplied with the voltage in the range from 4.8 to 7.2 V. DFRobot SER0044

Miniature, analog servomechanism with dimensions 20.0mm × 8.3mm × 17.3mm and weight 4.4g, power supply 4.8 ... 6V, maximum torque 0.6kg / cm (with 6V power supply). Pololu 3420

Motor with 20 mm diameter and 44 mm length, 156:1 metal gear, 6 V operating voltage, 0.15 A to 2.9 A power consumption, 91 RPM speed and 7.9 kg*cm maximum torque. Pololu 3718

These tall brackets offer an easy and  convenient mounting solution for mini plastic gearmotors.

A set for building a tracked chassis. It is characterized by low noise and easy control. The durable casing is made of aluminum, and the tracks are made of construction plastic. DFRobot ROB0154