This compact, inexpensive plastic gearmotor (brushed DC motor with a 120:1 reduction gearbox) is well suited for use in small robots. While intended for operation at 4.5 V, it should run comfortably in the 3 V to 6 V range.

With a celebrated reputation as an affordable, simple and fun-to-play DIY robot kit, the Insectbot breed has now evoled to its second generation: the Insectbot Hexa. KIT0090

The turbo metal gear worm motor uses a metal gear box for durability and a high torque output. Due to the special mechanical structure of the worm drive the motor output shaft is self locking and can not be rotated. FIT0489-B

The kit uses a magnetic disc and hall effect sensors to provide 12 counts per revolution of the motor shaft. The sensors operate from 2.7 V to 18 V and provide digital outputs that can be connected directly to a microcontroller or other digital circuit. Compatible with all of the dual-shaft micro metal gearmotors we carry, including the HPCB versions. Pololu 3081

Hybrid bipolar stepping motor with integrated 38cm (15″) threaded rod as its output shaft, turning it into a linear actuator capable of precision open-loop positioning. The motor has a 1.8° step angle (200 steps/revolution) and each phase draws 1.7A at 2.8V, allowing for a holding torque of 3.7kg-cm (51 oz-in). Pololu 2690

Black polyurethane scooter/skate wheel 100 × 24 mm, works with standard 608 bearings. Pololu 3278

This compact, inexpensive plastic gearmotor (high-power brushed DC motor with a 120:1 reduction gearbox) is well suited for use in small robots. While intended for operation at 4.5 V, it should run comfortably in the 3 V to 6 V range.

Evaluation kit with Bluetooth 4.0 module. It has 8 digital pins, 4 analog pins and 4 PWM. Compatible with Arduino, it is perfect as a platform for building a small robot. DFRobot DFR0351

This gearmotor is a miniature medium-power, 6 V brushed DC motor with 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 crawler wheels for constructing a 1:10 robot. The size of one set: 250 x 47 x 38 mm, rubber tracks with high adhesion

A set of two Pololu wheels measuring 40x7mm in white. Fits D-shaped shaft with a diameter of 3mm. Pololu 1454

This gearmotor consists of a high-power, 6 V brushed DC motor combined with a 4.4:1 metal spur gearbox, and it has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 211.2 counts per revolution of the gearbox’s output shaft.

This gearmotor is a miniature low-power, 6 V brushed DC motor with a 75.81:1 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.

This gearmotor is a miniature high-power, 6 V brushed DC motor with long-life carbon brushes and a 210.59:1 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.

Terasic Spider is a six-legged robot rolling with 18 servos controlled by the Altera DE0-Nano-SoC board connecting the FPGA chip and the ARM Cortex-A9 processor. The set contains a complex robot and numerous accessories. P0425

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

Pololu - 1502

Designed for use with any sub-micro size Hitec servo, easy to assemble. Rob-13177

DAGU gearmotors; 4.5V with a no load current of 190mA while possessing a gearbox ratio of 48:1 and a wheel speed of 140 RPM unloaded. axis. ROB-13302

These lightweight aluminum brackets make it easy to mount and integrate the Sharp GP2Y0A02, GP2Y0A21, and GP2Y0A41 Distance Sensors into your project. The brackets are strong enough to hold their position, but they can also be bent by hand to different angles if the application calls for it.