• Changzhou Vic-Tech Motor Technology Co., Ltd.
    Andres Blanco
    The thruster have arrived correctly. I tested them on the ROV and we are very happy with the result. The epoxy interior finish is very good and the power of the motors in relation to the size is quite good.
  • Changzhou Vic-Tech Motor Technology Co., Ltd.
    Gregoire Lange
    The cooperation between Changzhou Vic-Tech Motor Tech and our company was just great. Good understanding of our needs, great willing to solve our problems. I recommend !
  • Changzhou Vic-Tech Motor Technology Co., Ltd.
    David Molevelt
    Professional and clear communication. Order was shipped in time. Counter connectors where added to the shipment. Driver works like we agreed !
  • Changzhou Vic-Tech Motor Technology Co., Ltd.
    Buildstorm Private Limited
    The product works as expected, it was packed nicely. Seller responds very quickly and helps in making a buying decision. They are ready to customize the product for you.
  • Changzhou Vic-Tech Motor Technology Co., Ltd.
    Ashley Griffin
    Shipment was received very quickly. Product was well protected by packaging. Company rep was cordial and kind. A Plus rating!
Contact Person : Kangtai Lee
Phone Number : +86 17715451401
Whatsapp : +8617715451401

SM4025 24V~36V Underwater motor waterproof motor thrust 7kg~9kg

Place of Origin China
Brand Name VIC-TECH
Certification RoHS
Model Number SM4025
Minimum Order Quantity 1Unit
Price $46-$60
Packaging Details The product is packed with pearl cotton, and the outside is in a carton.
Delivery Time 10~30 days after receiving sample payment
Payment Terms MoneyGram, Western Union,Credit Card,T/T, L/C
Supply Ability 100000\ Units/year

Contact me for free samples and coupons.

Whatsapp:0086 18588475571

Wechat: 0086 18588475571

Skype: sales10@aixton.com

If you have any concern, we provide 24-hour online help.

Product Details
Model No SM4025 Motor Type Underwater Brushless Motor
Weight 310g Underwater Thrust 7kg-9kg
Rated Torque 0.9 N*m Rated Voltage 24~36V
Minimum Order Quantity 1unit
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Product Description


SW4025 underwater brushless motor is rated at 24~36 V DC, specially designed for underwater drones/robots. This model has no propeller, users can design their own propeller and fix it with screws.
This is ordinary brushless motor, it can be driven by any ordinary drone ESC controller or ordinary brushless motor controller.
Beautiful shape, long life, low noise technology, high energy saving rate, high torque and high precision.
It is widely used in precision electronic equipment, automation equipment, water and underwater equipment, model aircraft drones and intelligent robots.
Before you place an order, please make sure you have the ability to design the propeller.


Motor type Underwater brushless motor
Weight 310g
Underwater thrust 7KG~9KG
Rated voltage 24~36V
KV value 200~300
Unload speed 7000
Rated power 450~800W
Loaded current 15~23A
Rated torque 0.9 N*m

Design drawing:Screw holes on top used to fix propeller

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About underwater motors

Because brushless motor uses electronic commutation, so let brushless motor operation need to adapt to the motor voltage DC power supply, driver (ESC) and speed control signal.

Take a common model ESC as an example, first disconnect the power supply, connect the motor leads and speed signal line, the throttle travel to the highest (full duty cycle), connected to the power supply, you will hear the "drop" two sounds, the throttle travel quickly to the lowest position, and then you can hear the normal start of the motor "drop ---- drop" sound, the throttle travel calibration is complete, you can start the motor normally. (The operation mode of ESC may be different for different manufacturers, please refer to the manual of the corresponding ESC model or consult the ESC manufacturer for details)

Customers can use regular drone ESC (Electrical speed control) to drive this motor.

We only produce motors, and we do not provide ESC.

SW2216 motor Performance curve (16V, 550KV)

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Underwater motor advantages

1,Waterproof and moisture-proof to avoid short circuit of electrical components inside the chamber.
2,Effective blocking of dust and particles to avoid bearing wear.
3,Keep the cavity dry to avoid the motor and motor being corroded and oxidized, resulting in poor contact or leakage.


Precision Electronic Instrument
Automation Equipment
Underwater Equipment
Aircraft Model Drone
Smart Robot

Output axis

1.Wiring method

First of all, the motor, power supply and ESC should be selected accurately according to the load and use conditions, the power supply voltage is too high is likely to cause damage to the motor and ESC, the power supply discharge power is insufficient to allow the motor to reach the rated power and affect the use of the effect. ESC selection should also be matched with the rated voltage of the motor. Motor installation screws should not be too long, so as not to damage the motor coil. Before wiring, for safety, please remove the motor load, first connect the ESC and motor three leads (three leads can be switched two to change the direction of the motor), and then connect the ESC signal line, pay attention to the signal line wiring order, do not connect the reverse. Finally connect the DC power supply, positive and negative polarity can not be reversed, most of the market ESCs have reverse protection, no reverse protection ESCs in the power supply positive and negative polarity will have the risk of burning.

2.Throttle travel calibration.

When using ESC for the first time, or change the PWM signal source, or use the throttle signal out of calibration for a long time, you need to calibrate the throttle travel.

Lead time and packaging information

Lead time for samples:
Standard motors in stock: within 3 days
Standard motors not in stock: within 15 days
Customized products: About 25~30 days (based on complexity of customization)
Lead time for building a new mold: generally about 45 days
Lead time for mass production: based on order quantity


Samples are packed in foam sponge with a paper box, shipped by express
Mass production, motors are packed in corrugated cartons with transparent film outside. (shipping by air)
If shipped by sea, product will be packed on pallets

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PackagingDelivery method and time

DHL 3-5 working days
UPS 5-7 working days
TNT 5-7 working days
FedEx 7-9 working days
EMS 12-15 working days
China Post Depends on ship to which country
Sea Depends on ship to which country
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payment method

payment method Master card Visa e-Checking PAYLATER T/T Paypal
Sample order lead-time about 15 days
Lead time for bulk orders 25-30 days
products quality guarantee 12 months
Packaging single carton packing, 500 pieces per box.