This gearmotor is a miniature high-power, 6 V brushed DC motor with long-life carbon brushes and a 4.995:1 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 magnetic encoders for use with Pololu DC Micro motors. The maximum resolution is 12 pulses per one revolution of the motor shaft. Powered from 2.7V to 18V. Pololu 4761

Miniature, 12V brush DC motor with metal gear and 15.25:1 gear ratio. It has a cross section of 10 × 12 mm, and the D-shaped output shaft with a length of 9 mm and a diameter of 3 mm. Pololu 4786

The FS5106R is a standard-sized servo that has been built by FEETECH specifically for continuous rotation, making it an easy way to get your robot moving. It features two ball bearings on the output shaft for reduced friction, and it offers easy access to the rest-point adjustment potentiometer. 

Motor with 37 mm diameter and 65 mm length, 6,3:1 metal gear, 12 V operating voltage, 0,2 A to 5,5 A power consumption, 1600 RPM speed, 3 maximum torque and 64 CPR encoder. Pololu 4757

Motor with 25 mm diameter and 69 mm length, 99:1 metal gear, 6 V operating voltage, 0,55 A to 6,5 A power consumption, 97 RPM speed, 15 maximum torque and 48 CPR encoder. Pololu 4807

Support ball with fixing, designed for Romi Chassis chassis. Pololu 3536

Motor with 25 mm diameter and 67 mm length, 47:1 metal gear, 6 V operating voltage, 0,55 A to 6,5 A power consumption, 200 RPM speed, 8,5 maximum torque and 48 CPR encoder. Pololu 4805

SEN-12589

The versatile Romi chassis is a great starting point for your next mobile robot. This kit includes all the basic mechanical parts to get up and running, including two motors, two wheels, one ball caster, and battery contacts. The wheels and ball are white; all other plastic components are red.

Miniature high-power motor from the Pololu MP series. 100: 1 gear motor,
the rotation speed of the shaft is 220 rpm, the torque is 1.5 kg * cm (0.15 Nm).
The motor has an extended shaft which makes it easy to attach the encoder. Pololu 2381

A pair of 50x8mm silicone tires compatible with Pololu 60×8mm/70×8mm wheels. Pololu 3409

A pair of 32.5 x 6.6mm silicone tires compatible with Pololu 40x7mm wheels. Pololu 3408

DC Micro motor module with metal gear with a gear ratio of 30:1. The motor is connected to the board containing the driver. DFRobot DFR0399

Engine with metal worm gear with ratio: 1: 37.3, supply voltage: 6V, 160rpm, torque: 0.27 Nm. DFRobot FIT0489-A

A set for self-assembly of a robotic arm with four degrees of freedom (4DOF) equipped with MG90S servomechisms. The arm at the end has a small gripper which allows you to catch and carry small objects. The handle is controlled using a plate compatible with Arduino Uno or a module with potentiometers.

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. This version also has a 4.5 × 1 mm extended motor shaft.

A set of two Pololu wheels with dimensions 60x8mm in black. Intended for Micro servos with 4.8mm diameter spline and 20 teeth. Pololu 4910

Bipolar stepper motor powered with a voltage of up to 12 V and a maximum current of 400 mA. SparkFun ROB-10551

The left Mecanum multi-directional wheel with a diameter of 97 mm, which consists of 9 rollers located around the circumference of the wheel. The wheel hub fits the 4 mm motor\'s shaft