24.4mm RK-370 24V 6000RPM Motor For Robotic Arm Robot Joint Carbon Brush DC Motor

RK-370 Carbon Brush Motor Techincal Parameters

• Model: RK-370CA-11670 Motor

• Shaft Type: Round Shaft

• Shaft Diameter: 2mm

• Shaft Length: Free-Customization (L)/ 10.5±0.5mm

• Motor Body Diameter: 24.4mm

• Motor Body Length: 30.8mm

• Voltage Range: DC 3V-24V

• Rated Volt:24V

• Front Steps Diameter:6.4mm

• Front Step Height: 1.5 mm

• Diagonal Installation Pitch: 17mm

• Mounting Hole Size: M2.5

• Mounting Holes: 2 Holes

• No-load Speed :6000RPM
• No-load Current :25mA

RK-370 24V 6000RPM Motor For Robotic Arm Robot Joint Dimension

Carbon Brush 370 Mini Motor Used in Robotic Arm Robot Joint

Micro DC motors are widely used in robotic arms due to their high efficiency and rapid response capabilities. Their compact size, low power consumption, high speed, and low noise make them ideal for providing efficient power support in robotic arm systems. Typically, robotic arms consist of multiple motors, where micro DC motors deliver fast response times and high torque output, enabling precise motion control.

Specific Applications in Robotic Arms

1. Joint Actuation

   • Each joint of a robotic arm requires precise control and power transmission. Micro DC motors, combined with gear reduction mechanisms, provide the necessary torque to drive flexible joint movements.

2. Precision Control

   • The high accuracy and quick response of micro DC motors allow robotic arms to perform delicate operations, making them suitable for tasks requiring fine-tuned movements.

3. Multi-Motor Coordination

   • Robotic arms often rely on multiple motors working in sync. The small size and high efficiency of micro DC motors enable compact integration, facilitating complex motion control in limited spaces.

Key Technical Parameters & Selection Guide

When selecting a micro DC motor for robotic arms, consider the following factors:

• Operating Voltage – Ensure compatibility with the robotic arm’s power system.

• Speed & Torque – Choose appropriate values to meet the arm's dynamic requirements.

• Gear Ratio – Adjusts output torque and speed for different operational needs.

• Noise Level – Low-noise motors minimize operational disturbances.

By optimizing these parameters, micro DC motors enhance the performance, precision, and reliability of robotic arm systems in industrial, medical, and automation applications.

Motor Recommendations for Robotic Arm Joints and Guide to Selecting the Right Micro Motor

The joint drive system of robotic arms places extremely high demands on motor performance, requiring a balance of high precision, fast response, compact size, and stable torque output. Below are common motor types and key selection factors.

I. Common Motor Types for Robotic Joints

1. Micro DC Gear Motors (Brushed DC Gear Motors)

Features:

• Low cost, simple control, suitable for low-load applications

• Gearbox increases torque but has brush wear issues
  Recommended Models:

• RF-370CA (12V, 6000 RPM, 5 kgf.cm output torque)

• RK-528 (24V, 8000 RPM, 27 kgf.cm torque with planetary gearbox)
  Applications:

• Educational robots, lightweight robotic arms, DIY projects

2. Brushless DC Motors (BLDC Motors)

Features:

• High efficiency, long lifespan, maintenance-free

• Requires a driver, supports high dynamic response
  Recommended Models:

• EC-45 Flat (48V, 300W, high torque density)

• T-Motor MN5208 (for collaborative robot joints)
  Applications:

• Industrial robotic arms, medical robots, high-precision automation

3. Stepper Motors

Features:

• Open-loop control, precise positioning, but prone to step loss at high speeds

• Suitable for low-speed, high-precision applications
  Recommended Models:

• NEMA 11 (28mm size, 0.5 Nm torque)

• Closed-loop stepper motors (e.g., Leadshine ES series)
  Applications:

• 3D printing robotic arms, lab automation

4. Servo Motors

Features:

• Closed-loop control, high dynamic performance, precision up to 0.1°

• Integrated encoder, but higher cost
  Recommended Models:

• Dynamixel XM430-W350 (for medium robotic arms)

• Harmonic Drive CSF-11 (ultra-precise integrated harmonic servo)
  Applications:

• Industrial robotic arms, surgical robots, aerospace equipment

II. Key Selection Parameters

1. Torque & Speed

• Joint load calculation: Torque requirements depend on arm linkage weight and end-effector load.

• Gear ratio selection: High reduction ratios (e.g., 100:1) increase torque but reduce speed.

2. Size & Weight

• Robotic joints have limited space; compact motors (e.g., diameter ≤40mm) are preferred.

• Frameless motors save additional space.

3. Control Method

• Open-loop (stepper motors): Low cost, suitable for simple positioning.

• Closed-loop (servo/BLDC): Requires encoder feedback for high-precision control.

4. Power Supply & Efficiency

• Low voltage (12V/24V) for lightweight arms; high voltage (48V+) for industrial use.

• BLDC efficiency (>85%) typically exceeds brushed motors (60-75%).

5. Environmental Adaptability

• Industrial applications need waterproof/dustproof models (e.g., IP65).

• Medical/food industries require stainless steel or grease-compatible designs.

III. Recommended Selection Process

1. Calculate joint load torque (static + dynamic inertia).

2. Determine motion profile (speed, acceleration needs).

3. Choose motor type (brushed/BLDC/servo).

4. Match with gearbox (planetary, harmonic, etc.).

5. Verify size & heat dissipation (prevent overheating).

IV. Application Examples

• Collaborative robots (UR5e): Harmonic drive servos, ±0.1mm repeatability.

• Surgical robots (Da Vinci): BLDC motors + precision encoders, <2% torque ripple.

• Educational arms (uArm): DC gear motors + potentiometer feedback, cost-effective.

Conclusion

Robotic joint motor selection requires balancing performance, cost, and size. Lightweight applications can use DC gear motors, while high-precision needs favor servos or BLDC solutions. Lihua Motor offers customized micro motor solutions, supporting voltage, torque, and encoder integration—contact us for tailored requirements!

(For detailed motor specs or torque calculation tools, request technical documentation.)