775 Series DC Motor Double Bearing 12–36V High Torque

RS-775 12V–36V High Power Brushed DC Motor Double Ball Bearing 5mm Shaft

The RS-775 DC Motor is a widely used high-power brushed motor designed for mechanical motion systems, DIY machines, robotics, and electric tool mechanisms. It belongs to the 775 size motor family, known for its strong torque output and stable operation. Because of its balanced rotor and dual ball-bearing structure, the motor produces smoother rotation and lower vibration compared to sleeve-bearing motors.

This motor converts electrical energy into rotational mechanical energy using carbon brushes and a commutator. When DC voltage is applied, current flows through the armature windings, generating a magnetic field that interacts with the permanent magnets inside the housing. This electromagnetic interaction produces rotation at the shaft. As voltage increases, RPM increases proportionally, making the motor highly flexible for different projects.

In Bangladesh and BD-based DIY and robotics communities, the RS-775 motor is commonly used due to easy availability of 12V, 18V, and 24V power supplies. At Bigyan Project, this motor is especially popular for building small cutting machines, pump systems, mobile robots, and experimental mechanical setups. Its built-in cooling fan improves heat dissipation, allowing longer runtime during continuous operation in workshop environments across Bangladesh.

Product Specifications

Features

• High torque output suitable for mechanical load applications
• Dual ball bearing for smoother and stable rotation
• Wide voltage operating range (12V–36V)
• Built-in cooling fan for heat reduction
• Standard 5mm shaft compatible with common couplers
• Low vibration compared to sleeve-bearing motors
• Compact but powerful 775 form factor

Applications / Use Cases

• DIY cutting and drilling machines
• Mini spindle and polishing machines
• Robotics drive mechanisms
• Water pump or air blower projects
• Battery powered mechanical devices
• Educational engineering projects in Bangladesh
• Workshop automation prototypes

User Guide / How to Use

• Connect to a DC power supply within 12V–36V range
• Use a motor driver or high current switch for safe control
• Secure motor using M4 mounting screws
• Attach coupler, pulley, or gear to the 5mm shaft
• Avoid blocking the cooling fan airflow
• Start at lower voltage before applying higher voltage
• Use proper wiring and thick cables to prevent heating

Frequently Asked Questions (FAQs)

• Q: Can I run this motor on a 12V battery?
  A: Yes, it operates safely at 12V and will produce approximately 3500 RPM.
• Q: Is a motor driver required?
  A: Recommended for speed control and safe switching, especially in robotics.
• Q: Can it be used as a drill motor?
  A: Yes, with a chuck attachment it can power small drilling setups.
• Q: Does RPM change with voltage?
  A: Yes, higher voltage increases rotational speed.
• Q: Is it suitable for robot wheels?
  A: Yes, typically used with a gearbox to increase torque.

Challenges and Considerations

• High starting current may require strong power supply
• Not waterproof; avoid moisture exposure
• Heat may build up under heavy load
• Direct battery connection without switch can cause sparks
• Requires proper mounting alignment

Compatibility

• 12V, 18V, 24V, and 36V DC power supplies
• PWM motor speed controllers
• 775 motor mounting brackets
• 5mm shaft couplers and drill chucks
• Motor driver modules used in robotics

Future Enhancement Options

• Add gearbox reduction for higher torque
• Integrate PWM speed controller
• Attach encoder for RPM measurement
• Use belt pulley system for machine building
• Combine with battery pack for portable tools

Benefits

• Versatile usage across many engineering projects
• Easily available power supply compatibility
• Strong performance for its compact size
• Suitable for hobbyists, students, and workshops
• Popular among Bangladesh DIY community and Bigyan Project users

Conclusion

The RS-775 DC Motor is a dependable high-torque motor suitable for robotics, workshop tools, and experimental machines. Its wide voltage support, strong mechanical output, and cooling design make it a practical choice for builders and students across BD and Bangladesh. Whether used in a prototype machine or a permanent setup, it offers flexibility and reliable performance for a variety of mechanical applications.

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