RK-250 22mm High Speed High Torque DC Motor Brush Carbon Motor For Actuator 3-12V

RK-250 Carbon Brush Motor DC Technical Parameters

• Motor Name/Type:RK-250 Mini motor
• Rated Voltage: 9.0VDC
• No-load Current: 75mA max
• No-load Speed: 6200±310 rpm
• At Maximum Efficiency Speed: 5041r/min
• At Maximum Current: 0.266A max
• At Maximum Torque: 3.219mN.m
• At Maximum Output: 1.54 w
• At Maximum Efficiency:64.2%
• Stall Current: 1.34A
• Stall Torque:19.4 mN.m
• At Maximum Power Output
  • Output:2.781w
  • Torque:9.702mN.m
  • Speed:3270rpm
  • Current:0.64A
• Body Size: 30.5mm x 22mm (L*D)
• Shaft Size: 2mm diameter
• Weight: 38 grams
• Operating Temperature: -10°C ~ +60°C
• Direction of Rotation:CCW

RK-250 High Speed Brush Carbon Motor Dimension

RK-250 Micro Motor Dimension Information
1.Motor Shell Size:22mm Diameter*30.5 Length (Length without output shaft length)
2.Front Step Diameter:6mm
3.Front Step Height:1.5mm
4.Output Shaft Length:20mm/6mm/9mm/10mm or Custom
5.Terminal Distance:15.2mm
6.Mounting Screw Holes Distance:14mm
7.Screw Holes Size:2*0.4mm

8.Terminal Height:2.5mm

RK-250 DC Motor 22mm Mini Motor TN Curve

Applications of RK-250 Motor in Smart Automation Systems

The RK-250 motor serves as a versatile drive solution across multiple automation sectors, delivering reliable performance in critical applications:

1. Motorized Curtain Systems

• Voltage compatibility: 6.0V-28.0V DC

• Silent operation (<40dB) with smooth speed regulation

• Integrated position feedback for precise curtain control

• IP54-rated options available for humidity-prone environments

2. Emergency Smoke Ventilation

• Instant activation (response time <0.5s)

• High starting torque (up to 800mN·m) for rapid window opening

• Fail-safe design ensures operation during power outages

• Certified for EN 12101-2 smoke control standards

3. Smart Building Integration

• IoT-ready with RS485/Modbus communication options

• Compatible with KNX, DALI, and BACnet protocols

• Programmable limit switches for automated positioning

• Energy-efficient operation (standby power <0.5W)

Technical Advantages:

• Dual-bearing structure enhances lifespan (>50,000 cycles)

• Optional encoder feedback (12-bit resolution)

• Wide temperature range (-20°C to +60°C)

• Compact design (Ø25mm × L50mm) for space-constrained installations

Industry Certifications:

• CE, RoHS compliant

• UL1004-1 recognized (pending)

• REACH chemical compliance

The RK-250's combination of robust construction and smart features makes it ideal for modern automated environments requiring both reliability and connectivity. Custom configurations available for specific voltage, torque, or communication requirements.

Guang Dong Lihua Mechatronics Co., Ltd.(Lihua Motor) was founded in May 2003, formerly Shen Zhen Hua Chuang Sheng Motor Co., Ltd.  (HCS Motors) 

In order to expand its business, it relocated from Shenzhen to Humen Town (Dongguan City) in October 2017. Lihua is a manufacturer of high-quality DC motors integrates professional development, production and sales, offering a wide range of DC motors, including brushed and brushless motors, geared motors,stepper motor. We has been at the forefront of motor manufacturing and customizing for 20 years, consistently delivering high-performing and reliable products to clients worldwide.

These motors are designed for various applications, including industrial equipment, medical devices, robotics, automotive systems, motor vehicle and more. We also provides Customized DC Motor Solutions to meet specific customer needs.