Motor with 20 mm diameter and 46 mm length, 313:1 metal gear, 6 V operating voltage, 0.15 A to 2.9 A power consumption, 45 RPM speed and 13 kg*cm maximum torque. Pololu 3721

Vibration damper for NEMA23 engines (Damper). It attenuates the vibrations and vibrations occurring at engine operation. Dimensions: 56x56x6mm

4WD car chassis construction kit. It can be used as a base for building a robot

This gearmotor is a miniature high-power, 6 V brushed DC motor with 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.

Solarbotics GM8 143:1 Gear Motor Offset Output

SEN-11999

A universal set of structural elements (plastic beams, plates, metal brackets and fasteners, and a set of screws and nuts). Parts are pre-cut to the most frequently used lengths. Totem TKM-MK1

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

Copper alloy traveling nut intended for use with Tr8×8(P2) threaded rods and features a mounting flange with four holes threaded for M3 screws. Pololu 2688

Motor with 37 mm diameter and 57 mm length, 131:1 metal gear, 24 V operating voltage, 0,1 A to 3 A power consumption, 79 RPM speed and 47 maximum torque. Pololu 4686

Miniature, 12V brush DC motor with metal gear with 15.25: 1 ratio. It has a cross section of 10 × 12 mm, and the D-shaped output shaft has a length of 9 mm and a diameter of 3 mm. It also has an extended motor shaft with dimensions of 4.5 × 1 mm. Pololu 4789

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

Micro analog servo with plastic gear. It has a range of motion of 180°. Pololu 1049

A DIY spider robot that you can expand according to your own taste and ideas. There are two mounting options allowing you to change the stride length and gait of the spider. DFRobot ROB0103

Motor with 25 mm diameter and 58 mm length, 378:1 metal gear, 12 V operating voltage, 0,1 A to 1,1 A power consumption, 14 RPM speed and 23 maximum torque. Pololu 3258

Sub-micro analog servo with plastic gear. It has a range of motion of 180°. Pololu 1053

DC motor with 1:84 planetary gear with a supply voltage from 6 to 24 V and a rotational speed of 140 RPM. Maximum current consumption up to 1.3 A. SparkFun ROB-15277

Power HD Standard Servo 3001HB

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.

High-power brushed DC motor, 120:1 reduction gearbox, intended for operation at 4.5 V, 9.7mm-long gearbox, 3 mm-diameter D-shaped output shaft that is offset from but parallel to the motor shaft, built-in safety clutch. Pololu 1512