PB-BLDC-5840-3650 24V 40 RPM Brushless Worm Gear Motor - Built-in Driver, Hall Encoder, 8mm D-Shaft

Specifications

• Operating Voltage: 24V DC

• No-Load Speed: 40 RPM

• Torque: 40 kg.cm
• Stall Torque: 70 kg.cm

• Motor Technology: Brushless DC (BLDC) with Internal Driver

• Speed Control: 0-5V PWM Input (Blue Wire)

• Encoder: FG Hall Signal, 6 Pulses/Revolution (Yellow Wire)

• Shaft Type: D-Shape

• Shaft Diameter: 8mm

• Shaft Length: 15mm Total (13mm D-cut)

• Mounting Holes: 4 x M4 (6mm deep)

• Motor Body Dimensions: 36mm (Diameter) x 50mm (Length)

• Gearbox Dimensions: 58.2mm (L) x 40mm (W) x 27mm (H)

Key Applications and Projects

• Automated Solar Trackers: Using the Hall encoder to count exact rotations, allowing a solar panel array to accurately follow the sun's trajectory throughout the day.

• Smart Conveyor Belts: Utilizing the 0-5V PWM input to maintain a perfectly constant speed on a miniature factory assembly line, regardless of the load weight.

• Precision Linear Actuators: Driving a heavy lead screw for a DIY CNC bed or lifting mechanism where positional holding (self-locking) is critical.

Unlock New Capabilities (Project Evolution)

• The PID Controlled Balancing Robot: Standard gear motors struggle with precise speed regulation when the load changes. Evolve your robotics project by utilizing the built-in FG Hall Signal! By feeding the yellow wire's pulses into an Arduino's interrupt pin, you can write a PID algorithm that continuously monitors the exact RPM. If the robot hits a ramp and starts to slow down, your code can instantly increase the PWM signal on the blue wire to compensate, maintaining absolute perfect speed control!

ACCESSORIES / PACKAGE INCLUDED

• 1 x PB-BLDC-5840-3650 24V 40 RPM Brushless Worm Gear Motor

• 1 x 5-Wire Control Harness (Pre-attached)

This video describes the working principle of the worm gear.

FREQUENTLY ASKED QUESTIONS (FAQ)

1. What is the operating voltage for this motor? The main power input requires a robust 24V DC power supply.

2. What is the output speed? At full 24V power (100% PWM), the geared output shaft spins at exactly 40 RPM.

3. What is the difference between this BLDC motor and a brushed motor? Brushless (BLDC) motors use electronic commutation instead of physical carbon brushes. This eliminates internal friction, sparks, and wear, resulting in a motor that lasts significantly longer and runs quieter.

4. Do I need to buy an external motor driver (like an L298N)? No! This motor features a built-in driver circuit. You simply provide it 24V power and a 5V control signal from your microcontroller.

5. How do I control the speed? Connect a 0-5V PWM (Pulse Width Modulation) signal from an Arduino or similar microcontroller to the Blue wire.

6. How do I make the motor run in reverse? The White wire controls direction. Leaving it disconnected runs the motor one way; bridging the White wire to the Black (GND) wire reverses the rotation (CW/CCW).

7. What is the Yellow wire for? The yellow wire is the FG (Frequency Generator) Hall signal. It acts as an encoder, outputting a square wave as the motor spins so your microcontroller can calculate RPM or distance.

8. How many pulses does the encoder output? The FG signal outputs 6 pulses per internal motor revolution.

9. What size is the output shaft? The shaft has an 8mm outer diameter.

10. What does "D-Shape" mean? The 8mm shaft has a 13mm flat section machined into it. This gives the set screws on your pulleys or flange couplings a flat surface to bite into, preventing slippage under high torque.

11. Is this motor self-locking? Yes. Due to the physics of the perpendicular worm gear design, the output shaft cannot be manually rotated when the motor is off. It acts as a mechanical brake.

12. What size mounting screws do I need? The face of the gearbox accepts standard metric M4 machine screws.

13. How deep are the mounting holes? The M4 threaded holes are exactly 6mm deep. Using screws that are too long will damage the internal gears.

14. What are the dimensions of the black motor body? The cylindrical BLDC motor body is 36mm in diameter and 50mm long.

15. Can I run this motor on 12V? While the internal electronics might power on at 12V, it is strictly designed for 24V to achieve its rated torque, driver stability, and 40 RPM speed. Running it at 12V is not recommended.

16. Is this motor waterproof? No, the metal housing and the wire entry point are not sealed against water. It must be protected in an enclosure if used outdoors.

17. What happens if I only connect the Red and Black wires? Without a PWM signal applied to the Blue wire, the motor will likely remain stationary or default to maximum speed depending on the internal pull-up resistors of the specific driver batch. It is intended to be used with a microcontroller.

18. Can I attach a wheel directly to this shaft? You should use an 8mm Rigid Flange Coupling designed specifically for an 8mm D-shaft to ensure a secure, balanced fit for wheels or heavy lifting arms.

19. Does the BLDC motor get hot? Brushless motors run significantly cooler than brushed motors, but under heavy, continuous load, the gearbox will still generate warmth. Ensure adequate ventilation.

20. Can I manually turn the shaft to adjust my project when power is off? No. Because it is a worm gear, forcing the shaft to turn by hand will strip the metal gears. You must use the PWM controller to move it.