Guang Dong Lihua Mechatronics Co.,Ltd
| No-load Speed | 6000-25000 r/min |
| Max Torque | 506g.cm |
| Applications | Electric Curtain/ Tin Opener |
| Name | High Torque DC Electric Motor |
| Motor Type | RK-2238 |
| Motor Category | Small Electric Motor Carbon Brushes |
| Motor Shaft Diameter | 2mm*23.8mm(D*L) |
| Volt | 6V DC-30VDC can choose |
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Ability | 10000PCS/Day |
| Delivery Time | 35-45Day |
| Packaging Details | Carton |
| Brand Name | Lihua Motor/HCS Motors |
| Model Number | RK-2238 Motor |
| Certification | Reach/RoHs/IATF16949/ISO9001 |
| Place of Origin | Dongguan,China |
View Detail Information
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Product Specification
| No-load Speed | 6000-25000 r/min | Max Torque | 506g.cm |
| Applications | Electric Curtain/ Tin Opener | Name | High Torque DC Electric Motor |
| Motor Type | RK-2238 | Motor Category | Small Electric Motor Carbon Brushes |
| Motor Shaft Diameter | 2mm*23.8mm(D*L) | Volt | 6V DC-30VDC can choose |
| Payment Terms | L/C,D/A,D/P,T/T,Western Union,MoneyGram | Supply Ability | 10000PCS/Day |
| Delivery Time | 35-45Day | Packaging Details | Carton |
| Brand Name | Lihua Motor/HCS Motors | Model Number | RK-2238 Motor |
| Certification | Reach/RoHs/IATF16949/ISO9001 | Place of Origin | Dongguan,China |
| High Light | 22mm DC Motor High Torque ，RK-2238 High Torque DC Electric Motor ，High Speed High Torque Electric Motor | ||
RK-2238 22mm Mini Motor High Torque DC Electric Motor For Curtain Tin Opener
2238 DC Motor Carbon Brush Technical Parameters
RK-2238 High Speed High Torque Electric Motor DC Motor Dimension
RK-2238 Micro Motor Dimension Information
1.Motor Shell Size:22mm Diameter*38.3 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
RK-2238 22mm Mini Motor TN Curve
Explanation For Motor Paramter Information Chart
N:speed
It indicates the number of revolution per minute(rpm) of the rotor,speed would be vary pending on voltage(V) and load point.
I:current
It indicated the amount of electrons (current) discharged when voltage is applied.The load applied to the motor is directly proportional to the current drawn by the motor.
T:torque
The twisting force casusing rotation of the rotor.The value of torque depend on the load and the current drawn by the motor.
P:power output
Power output is the product of N and T.The maximum output (p max) would be at the point of Ts/2 on the P curve.
E:efficiency
The percentage of mechanical power output induced by elctrical input (E=P/VI*100%).The maximum efficienct (E Max) would be found at a point in the torque range less than TS/2.
The 2238 micro motor is an ideal driving core for electric bottle openers due to its compact size, high torque output, and stable performance. Here are its key advantages:
Diameter: Only 22mm, length: 38mm, perfectly fitting the compact internal structure of bottle openers.
Lightweight design (~30–50g) enhances handheld comfort.
Stall torque: 300–500 g.cm, easily handling caps of different materials (metal/plastic).
When paired with a planetary gearbox, output torque increases 5–10x, ensuring smooth rotation without jamming.
Wide operating voltage range (3V–12V), compatible with alkaline or lithium batteries.
No-load current ≤100mA, load current ≤300mA, ensuring energy efficiency.
Noise level ≤45dB (at 10cm distance), avoiding operational noise.
Brush life ≥200 hours (with 5 uses/day, lasting over 5 years).
Starting voltage ≤1.5V, response time <0.1s, triggering rotation instantly upon button press.
Supports forward/reverse rotation, compatible with left/right-threaded caps.
With over 20 years of DC motor manufacturing experience, Lihua Motor has successfully served 1,000+ global clients across industries. Our 99% on-time delivery rate and ISO 9001-certified production ensure reliable quality control. We specialize in:
✔ Custom motor solutions (voltage, torque, size adjustments)
✔ Prototype-to-mass production support
✔ Strict quality testing (lifespan, noise, torque validation)
| Motor Type | Pros | Cons | Best For |
|---|---|---|---|
| 2238 Brushed Motor | Low cost, high torque | Requires brush maintenance | Household openers |
| Brushless Motor | Long lifespan, maintenance-free | Higher cost (2–3x) | Commercial openers |
| Stepper Motor | Precise angle control | Slow speed, complex structure | Smart openers |
Household Electric Openers: Cost-effective for daily use.
Hotel/Restaurant Openers: Custom stainless steel shaft for heavy-duty use.
Multi-Function Kitchen Tools: Integrates cap removal, peeling, etc.
Selection Tip: For cost efficiency, stability, and plug-and-play use, the 2238 micro motor is the best choice. For ultra-long lifespan, upgrade to a brushless version (30–50% higher cost).
Note: Actual selection should match the gear ratio (20:1–50:1 recommended) to optimize torque/speed balance. Contact Lihua Motor for free technical consultation and custom solutions.
Q & A
Q1: Are you a trading company or a manufacturer?
A: We are a professional manufacturer specializing in DC mini motors and gear mini motors. We directly trade our products with our clients, ensuring high quality and competitive pricing.
Q2: Can you provide OEM and ODM services?
A: Yes, we offer both OEM and ODM services. We can customize materials, colors, and styles according to your requirements. After discussing your needs, we will advise on the minimum order quantity.
Q3: What’s is your shipping service?
A: We can provide services for vessel booking, goods consolidation, customs declaration, shipping documents preparation and delivery bulk at the shipping port.
Q4:When can I get the quotation?
A:We usually quote within 24 hours after we get your inquiry. If you are very urgent to get the price, please tell us so that we will regard your inquiry priority.
Q5: How can I get a sample to check your quality?
A:After price confirmation, you can require for samples to check our quality. If you need the samples, we would like to send sample from our Chinese factory or u can get the sample directly from our european agent storage.
As a trusted supplier of small dc gear motor solutions, Lihua Motor manufactures high-quality mini dc motor with gearbox assemblies for industrial and consumer applications. Our small worm gear motor series delivers reliable torque output with customizable speed and voltage options to meet OEM requirements.
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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