Vacuum Side Brush Motor RK-500TB Diameter Φ32mm Brushed Micro DC Electric Motor

The RK-500TB Φ32mm brushed micro DC motor is specifically engineered for side brush applications in robotic vacuum cleaners. Featuring a compact cylindrical structure and a carbon brush commutation system, it delivers stable output torque and consistent rotational speed—critical for driving the side brushes that reach into wall edges and corners.

Its brushed design simplifies motor control circuitry, making it a cost-effective and reliable solution for consumer-grade robotics. The motor’s rated voltage and torque characteristics can be customized to meet different brush load requirements, ensuring optimal sweeping performance and durability under repeated duty cycles.

Technical Specifications

Since micro motors are custom-made products, it's not feasible to list all motor specifications and parameters worldwide. As a manufacturer, in order to help buyers better understand the basic motor parameters and the most common models we produce, we provide the following examples of representative motor types.

• RK-500TD-16350 
  Rated Voltage:14.0V DC (Custom Option)
  Operating Voltage:12V-17V
  Rated Voltage:14.0V
  No-load Speed: 10000 ±100RPM
  Diameter: 32mm(1.26 inch)
  Shaft Diameter: 2mm (0.0787 inch)
  Shaft Length:9mm (Custom Option)
  Current (No Load): 46mA @ 14V
  Torque: 50mN·m (adjustable up to 200 g.cm)
  Weight: 37g

Above all technical parameters can be customized .

Popular Customized RK-500 Motor Model Types List  and Dimension

Notes:
1.Motor Body Length:17.5mm
2.Motor Output Shaft Length:L±0.5mm
3.Motor Output Shaft Diameter:2mm
4.Motor Diameter:32mm
5.Fixed Aperture:M2.5*0.45mm
6.Step Height: about 1.9mm
7.Step diameter: about 6.2mm
8.Distance between two fixed aperture:22±0.1mm 
 

Brushed DC Motor Applications in Robotic Vacuum Cleaners

Micro DC motors are at the heart of robotic vacuum cleaners, with seven motors typically working in coordination to ensure precise operation of sweeping, mopping, suction, and navigation functions. Among these, six motors are commonly brushed DC motors, selected for their simplicity, cost-effectiveness, and reliable performance.

Below is a breakdown of brushed motor applications across key functional modules. Click the links to explore recommended motor models.

Side Brush Motors

Two side brush motors (commonly RK-500TB series, Φ32mm) spin at around 5400 RPM via gear reduction systems to efficiently sweep dust and debris into the main suction path.
View RK-500TB Series ➝

 Drive Wheel Motors

The robot's mobility depends on two brushed DC motors, typically from the 520 series, operating at approximately 6500 RPM. These motors power the left and right wheels independently via gear mechanisms, enabling forward motion, turning, and obstacle negotiation. A failure in one motor can cause navigation errors; if both fail, the robot becomes immobile.
Explore 520 Series Drive Motors ➝

Main Brush / Roller Brush Motor

Responsible for rotating the roller brush to agitate and sweep debris, this component typically uses 380 or 390 brushed DC motors running at around 9000 RPM. Each robot includes one such motor, offering robust torque output for deep carpet or hard floor cleaning.
See 380Motor Options ➝ 
See 390 Motor Options ➝

Laser LIDAR Motor (for SLAM Navigation)

Laser scanning systems may employ either brushed or brushless motors to rotate the LIDAR unit. A failure here compromises obstacle recognition and room mapping. In this context, the motor acts as the "eyes" of the robot.
Browse Precision Brushless LIDAR Motors ➝
Browse Precision 500 LIDAR Motors ➝

Suction Motor (Brushless Only)

This is the only brushless motor in most robot vacuums, designed for 20,000–30,000 RPM to produce strong suction. Brushed motors are not suitable here due to excessive carbon brush wear at high speeds, which would lead to premature failure (within a year). Brushless motors extend service life and reduce maintenance.

For buyers seeking a complete system solution, we offer motor customization by torque, voltage, shaft type, and lead wires to meet your full design needs. Contact us for technical consultation or explore our recommended motor families.