The CubeMars SW12 underwater thruster is a high-efficiency propulsion unit designed specifically for light-duty underwater platforms such as surface/semi-submersible unmanned surface vessels (USVs), handheld diver propulsion vehicles (DPVs), and electric surfboards.
Featuring a high-strength aluminum alloy housing, a dual-chamber independent sealing structure, and a low-friction dynamic shaft seal system, the SW12 is filled internally with high-thermal-conductivity material and leverages direct water cooling for efficient thermal management. It operates reliably at depths up to approximately 30 meters and delivers a static thrust of ≥12 kgf.
This thruster is ideal for applications demanding an optimal balance of compact size, lightweight design, and high thrust—such as USVs, handheld propulsion devices, and electric hydrofoil boards.
Dimensions
Φ130.6 × 151.5 mm
Maximum Static Thrust
12 kgf
Continuous Rated Powe
520 W
Operating Depth
0–30 m
Weight (in air)
1180 g
Cable specification
TPU φ8mm, 3×16 AWG, 1.5M
High Thrust Outpu
Delivers ≥12 kgf static thrust—suitable for medium-sized USVs or handheld propulsion systems requiring strong thrustv
Precision Aluminum Alloy Housing
Lightweight yet robust cast aluminum body offers excellent corrosion and impact resistance
Dual-Chamber Sealing & Low-Drag Shaft Seal
Effectively blocks sand and debris ingress, enhancing reliability and service life
Advanced Thermal Management
Internal high-conductivity potting compound enables rapid heat dissipation via ambient water cooling, supporting sustained operation
Easy Integration & Customization
Supports both clockwise and counter-clockwise propeller configurations to meet diverse underwater maneuvering requirements
Utilizes threaded connections and two-stage independent sealed
compartments
featuring low-resistance dynamic sealing to prevent sediment intrusion
into
the motor compartment, needing no maintenance
Features a simplified internal structure for a more stable and reliable operation
Incorporates a streamlined design to effectively reduce underwater
resistance
ensuring optimal efficiency
| Rated power | 520W | Main shaft sealing method | Low-resistance dynamic seal |
| Rated voltage | 48V | Main body structure | Two-stage sealing chamber |
| Maximum mooring thrust | ≥12kgf | Cable specifications | TPU（Glossy） φ8mm- 3*16AWG- 1.5M |
| Applicable water depth | 0-30M | Driver | External |
| Material of the nozzle | POM | Applications | Unmanned surface vehicle, Electric surfboard Handheld thruster,etc. |
| Material of the propeller | Aluminum alloy | Weight | 1180g(in the air) 640g(in the water) |
| Material of the shell | Aluminum alloy | Environmental conditions | 0-50℃(Storage) 0-40℃(Operating ) |
| Propeller specifications | φ106mm | Usage tips | Rinse with clean water promptly after use. |
| Motor rotor pole number | 28P | Recommended ESC matching | TW-40A-12S |
| category | Model | Rated Voltage (V) | Rated Power (W) | Maximum Mooring Thrust (KGF) | Applicable Water Depth (M) | Weight (G) | Size (diameter *length) MM | Operation |
| DW Series | DW10 | 36 | 540 | 10 | 0-350 | 840 | Ф100*148 |  |
| DW Series | DW15 | 48 | 750 | 15 | 0-350 | 1260 | Ф130.6*174.5 | |
| DW Series | DW20 | 48 | 910 | 20 | 0-350 | 1630 | Ф152*182 | |
| DW Series | DW25 | 48 | 1315 | 25 | 0-350 | 1790 | Ф152*191 | |
| SW Series | SW7 | 36 | 360 | 7 | 0-30 | 700 | Ф100*125.5 | |
| SW Series | SW12 | 48 | 520 | 12 | 0-30 | 1180 | Ф130.6*151.5 | |
| SW Series | SW17 | 48 | 870 | 17 | 0-30 | 1350 | Ф130.6*163.5 | |
