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Spanish company requests a brushless sensorless outrunner DC underwater motor for manufacturing agreement.

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Partner keyword: 
Cleaning (sandblasting, brushing)
Electrical Engineering/ Electrical Equipment
Generators, electric engines and power converters
Sensors & Wireless products
Marine Environment
Power transmission equipment (including generators & motors)


Spanish technological SME specialised in automatic cleaning systems for ships is looking for a provider (manufacturing agreement) of a brushless sensorless outrunner DC motor to integrate into a robot for underwater cleaning of ship hulls.



Spanish IT SME is seeking for a motor provider that can process batches of no more than 100 units. The technology will be used to manufacture a robotic crawler that cleans a ship while navigating underwater.

The motor should be able to operate for several days underwater in salt water. Therefore, the motor should be built using corrosion resistant materials such as high-grade stainless steel and aluminium. The bearings should be either plastic or ceramic and, in both cases, no kind of lubricant but the sea water itself should be used.

The motor design should have an open design, in order to allow the seawater to flood it while cooling the motor and also lubricating the bearings.

The coils and magnets should be potted in marine grade epoxy to be ruggedized against salt water.

In relation to the cooperation type, the company is seeking to acquire the technology to build a new environment-friendly solution to improve their business performance, adapting the product to the specificities of its market (ships).

Technical Specification or Expertise Sought

Cooperation sought: 
Main technical features: Electrical requirements: Operating voltage 10 - 20 Volts. Max 22amps. At least 14 poles. Solder pads to connect wires Performance: 490 Kv (RPM/V). Torque: 0.5Nm. Dimensions: External diameter 36mm. Shaft diameter 5mm. Shaft extension 16mm. Mounting holes 4 evenly spaced x M3 compatible at a diameter of 24mm. Shaft end mounting holes (rotor) 4 evenly spaced x M3 compatible at a diameter of 19.1mm. Maximum motor longitude including shaft: 65mm Building materials: Shaft build on high-quality stainless steel. Water lubricated ceramic or plastic bearings capable to withstand salt water immersion. All other parts must be built on materials must be aluminium or high-quality stainless steel. Magnets on the rotor must be potted in marine grade epoxy resin. Coils must be potted in marine grade epoxy resin.

Partner sought

Cooperation area: 
A ship hull cleaning industry company specialised in efficient and cost-effective solutions of electronics and mechanical design, in order to solve the cleaning and fouling problems for hull boat, is requested for manufacturing services intended for building an outrunner, to be utilised as a water-related component (maritime field). The role of the partner is manufacturing the device, adapting it to their client’s needs, customer feedback in the product improvement process and speed.

Type and size

Cooperation task: 
SME 11-50,University,Inventor,R&D Institution,SME <10,>500 MNE,251-500,SME 51-250,>500