Guang Dong Lihua Mechatronics Co.,Ltd
| Payment Terms | ,L/C,T/T,D/P,D/A,Western Union,MoneyGram |
| Supply Ability | 10000PCS/Day |
| Delivery Time | 40-45days |
| Packaging Details | Plastic/Foam Box |
| Motor Type | RK-3030SA-18320 |
| Direction of Rotation | CCW/CW |
| Output Shaft Diameter | 2.3mm |
| Shaft Length | Free Custom |
| Body Size | 33mm*30mm(Not including Shaft length) |
| Motor Volt | 3V/5V/6V/7.8V/12V/13.5V |
| No-load Speed | 2900RPM/5000RPM/5100RPM/5600RPM/5800RPM |
| Application | Pump/Intelligent bathroom |
| Brand Name | Lihua Motor/HCS Motors |
| Model Number | RK-3030SA-18320 |
| Certification | ISO9001 Reach,RoHs,SGS,CE |
| Place of Origin | Dongguan China |
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Product Specification
| Payment Terms | ,L/C,T/T,D/P,D/A,Western Union,MoneyGram | Supply Ability | 10000PCS/Day |
| Delivery Time | 40-45days | Packaging Details | Plastic/Foam Box |
| Motor Type | RK-3030SA-18320 | Direction of Rotation | CCW/CW |
| Output Shaft Diameter | 2.3mm | Shaft Length | Free Custom |
| Body Size | 33mm*30mm(Not including Shaft length) | Motor Volt | 3V/5V/6V/7.8V/12V/13.5V |
| No-load Speed | 2900RPM/5000RPM/5100RPM/5600RPM/5800RPM | Application | Pump/Intelligent bathroom |
| Brand Name | Lihua Motor/HCS Motors | Model Number | RK-3030SA-18320 |
| Certification | ISO9001 Reach,RoHs,SGS,CE | Place of Origin | Dongguan China |
| High Light | Air Pump High Torque Mini Motor ，small 12 volt electric motors ，Small Electric Motor 12V | ||
Small Electric Motors 12V RK-3030SA 30mm For Air Pump High Torque Mini Motor
Model: RK-3030SA-18320
Volt:12.0V
Current:≤65mA
No-Load Speed:4600±230r/min
Output shaft: 2.3MM
Shaft length: 8.0±0.15mm
Screw hole: 2.6*0.45MM
Weight: 38 g
Height:30.5MM (excluding front and rear bearing housings)
Motor outer diameter:30 mm
Application:ATM/ Automatic vending machine/Copy machine/Paper money counter/Pump.
Model: RK-3030SA-20260B
Volt:12.0V
Current:≤100mA
No-Load Speed:5600±280r/min
Output shaft: 2.3MM
Shaft length: 8.0±0.15mm
Screw hole: 2.6*0.45MM
Model: RK-3030SA-13385
Volt:13.5V
Current:≤75mA
No-Load Speed:4150±332r/min
Output shaft: 2.3MM
Shaft length: 8.1±0.2mm
Screw hole: 2.6*0.45MM
Introduction: Permanent magnet brushed DC motor is equipped with permanent magnets that provide a strong magnetic field and ensure efficient operation. The brushed design of the motor allows for easy maintenance and adjustment of speed and torque.
Product Note: Data in this typical specification sheet are for other certain customers. Voltage, rated torque, speed, current, power and shaft extension feature & dimension can be customized to meet customer specific requirement.
RK-3030SA 30mm Mini Carbon Brushed Motor Dimension
RK-3030SA 30mm Diameter Motor Size:
Direction of Rotation:CCW/CW
Screw Hole Size:2.6*0.45mm
Screw Hole Distance:22mm
Motor Shell Height:30.5mm
Motor Shell Diameter:30.2mm
Front /End Cover Diameter:10mm
Front Step Height:2.6mm
Motor Shaft Diameter:2.5mm
Terminal Distance:22.4mm
Motor Shaft Length:L±0.5mm
FAQ
Micro DC Motors in Water Pump Applications: Advantages & Working Principles
Micro DC motors provide diverse power outputs (suction, vibration, extension, oscillation, etc.) for various applications. Below is a concise explanation of their advantages and working principles in water pumps.
A DC motor pump generates suction via high-speed rotation. During operation:
The coil and commutator rotate continuously
The magnets and carbon brushes remain stationary
Current direction alternates through brush-commutator contact
✅ Pros:
Low cost
Easy speed control
High starting torque
❌ Cons:
Brush-commutator friction increases noise
Limited lifespan (~1000 hours)
✅ Pros:
No brush/commutator wear (uses electronic commutation)
Longer lifespan (depends on bearings)
Lower noise
❌ Cons:
Complex speed control
1–3x higher cost than brushed motors
Compact, efficient, low-maintenance with extended lifespan
Customizable specs under the same voltage (e.g., 12V 20,000 RPM or 12V 25,000 RPM)
High precision & low noise (<35 dB; near-silent for low-power models)
Flexible speed control via PWM, analog signals, or potentiometers
⚠ Avoid:
Particle ingress (metallic debris increases friction)
Demagnetization (caused by overheating)
Prolonged idling
Electrical specs: Higher voltage = faster speed but more noise/current
Size/shape constraints
Operating environment (e.g., temperature limits)
Company Details
Business Type:
Manufacturer,Exporter,Seller,Trading Company
Year Established:
2003
Total Annual:
20598600-21971840
Employee Number:
400~500
Ecer Certification：
Verified Supplier
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-quali... 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-quali...
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