CubeMars DW20

The DW20 is a high-thrust underwater thruster designed for medium-class ROVs and AUVs. At a rated 48 V and 910 W of continuous power it produces at least 20 kgf of static thrust and works down to 350 meters. It is the first model in the DW series with a Ø152 mm housing and a Ø126 mm propeller. Its streamlined nozzle reduces drag under water and lowers the load on the power system.

Key features

• High static thrust. At least 20 kgf of thrust is enough to move medium-size unmanned underwater platforms comfortably with two thrusters per axis.
• 350 m depth. Validated down to 350 meters for inspection, maintenance and survey missions. The SW17, the most powerful SW model, is limited to 30 meters.
• Impact-resistant housing. The precision-cast aluminum alloy housing resists corrosion and impact.
• Dual seal chambers and low-drag shaft seal. Two independent sealed chambers keep sand, dust and water out and extend service life.
• Streamlined nozzle. The hydrodynamic profile of the POM nozzle reduces drag under water, improves thrust efficiency and lowers the load on the power system.

Applications

Typical applications include medium-class ROVs and AUVs, underwater inspection and maintenance vehicles, survey platforms, unmanned surface vehicles (USVs) and electric surfboards.

Is it enough for your project?

A single DW20 delivers at least 20 kgf of static thrust. For example, if two thrusters on an ROV face straight forward, forward static thrust is at least 40 kgf. In vectored layouts with four horizontal thrusters, the forward share depends on the thruster angles. Actual speed depends on hull drag and tether load.

The housing measures Ø152 x 182 mm and weighs 1630 g, about 960 g in water. The cable is 1.5 m, Ø9 mm TPU-jacketed 3 x 13 AWG. The motor rotor has 20 poles. If you need more power, consider the DW25 with the same housing diameter, and for a lighter thruster, the DW15.

How it compares to similar models

• SW17. 870 W at 48 V and 17 kgf of thrust. With a Ø130.6 x 163.5 mm housing and 1350 g it is smaller, and it works down to 30 m.
• DW25. Same Ø152 mm housing diameter and Ø126 mm propeller, 1315 W and at least 25 kgf of thrust. It weighs 1790 g.
• DW15. 750 W and at least 15 kgf of thrust. With a Ø130.6 mm housing and 1260 g it is lighter, and it pairs with the TW-40A-12S ESC.

Frequently asked questions

Which ESC does it work with?

The DW20 runs with an external driver. The pairing CubeMars recommends is the TW-80A-12S underwater ESC. The DW20 is not on the compatibility list of the TW-40A-12S, which pairs with the DW15 and smaller models.

How do I choose between the DW20 and DW25?

Both use the same housing diameter, the same propeller diameter and the same ESC. The DW25 gives 5 kgf more thrust at higher power. For medium-class vehicles without heavy payloads, the DW20 is usually enough.

Can it be used in seawater?

Yes. The housing resists corrosion and the sealing design keeps seawater out of the motor chamber. The manufacturer recommends rinsing with clean water after each use.

Are mounting parts included?

Yes. The box contains two mounting bases, a connecting rod and screws in three sizes. CubeMars also publishes a 3D drawing of a shared mounting bracket for the DW20 and DW25.

In the box

• DW20 underwater thruster
• Mounting base x2
• Connecting rod x1
• M4 x 10 mm screw x2, M4 x 15 mm screw x2, M5 x 16 mm screw x4

Box size Ø175 x 295 mm.

Related products

The ESC pairing CubeMars recommends for the DW20 is the TW-80A-12S underwater ESC set. Our team can support you with battery, control and vehicle integration.

Products in stock are dispatched within 3 business days from our warehouse in Turkey.

Shipping cost and delivery time to your country are shown at checkout. For models not listed in stock, ask our technical team about the lead time.

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Return conditions for international shipments are confirmed before purchase.