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.

These 20 mm long aluminum adapters convert a 6 mm diameter shaft to a 12 mm hex shaft that is compatible with many common hobby RC wheels. Pololu 2686

This gearmotor is a miniature high-power, 12 V brushed DC motor with long-life carbon brushes and a 9.96:1 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.

170 kV brushless DC motor with Hall sensor. Powered with the voltage from 18 to 42 V, dedicated to electric skateboards and scooters

Adapter that allows you to easily mount the wheels on a motor with a shaft diameter of 3 mm using screws size 4-40. The hub fits both round and D-shaped shafts. Pololu 1078

Silicone tube with an internal diameter of 5 mm and a length of 1 m for the Grow water pump. It will work in home automatic irrigation systems. Pimoroni COM3800

Motor with 25 mm diameter and 65 mm length, 20,4:1 metal gear, 6 V operating voltage, 0,25 A to 2,4 A power consumption, 290 RPM speed, 2,4 maximum torque and 48 CPR encoder. Pololu 4823

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 adapters (adapter) from the popular 4 mm to 12 mm motor shaft, wheel holders from RC models. Pololu 2684

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

This gearmotor is a miniature high-power, 6 V brushed DC motor with long-life carbon brushes and a 51.45:1 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.

DC motor with an offset output shaft gear. Equipped with a magnetic encoder. Waveshare DCGM-3865-12V-EN-240RPM

DC Micro motor module with metal gear with a gear ratio of 50:1. The motor is connected to the board containing the driver. DFRobot DFR0429

Set of two magnetic encoders for use with micro motors. Side mounting, set of 2. Pimoroni PIM605

100:1 Micro Metal Gearmotor MP

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.

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 blue. Pololu 3526

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

This NEMA 17-size hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 1.7 A at 2.8 V, allowing for a holding torque of 3.7 kg-cm (51 oz-in). Pololu 2267

100:1 Micro Metal Gearmotor with Extended Motor Shaft