DESCRIPTION
The Blu-Thrust Edge 170 Thruster is a compact, high-efficiency propulsion system designed for underwater vehicles operating at depths of up to 300 m / 984 ft. Its rugged construction features a fully isolated, resin-encapsulated, fully sealed brushless outrunner motor that delivers direct-drive thrust with minimal mechanical complexity. This configuration enhances torque, durability, and reliability in challenging subsea environments.
Each thruster includes a factory-installed rear snap-on cap (detachable) and a fixed front cap that cannot be removed. The rear cap allows tool-free access and cleaning, while the front incorporates a weed guard meeting IP2 finger-protection standards. Additional snap-on caps are available separately if replacements are required.
The optimized propeller and thrust duct geometry provide strong forward and reverse performance, validated through simulation, real-world trials, and full-power underwater testing in a pressure-rated chamber. Each unit may retain minor water residue from this process.
Rated for continuous operation over 200 hours, the Blu-Thrust Edge 170 performs consistently across a wide voltage input range (10 – 25.2 VDC). At 24 V, it delivers up to 5.3 kgf of forward thrust with just over 11 A of current. With the weed guard installed, power consumption increases slightly while maintaining excellent maneuverability for precise or low-speed operation.
Wiring is straightforward using the included Deep-Sea 3-Core (16 AWG) Underwater Cable, pressure-rated for 300 m operation when installed with a compatible gland penetrator. The unit mounts via four M3 holes and a central M6 hole spaced at 19 mm, and is compatible with standard gland cable penetrators for watertight integration into your housing system. Suitable for both saltwater and freshwater environments, the thruster should be rinsed with clean water after use to reduce corrosion risk.
Additional protection features include design resilience against foreign object entry and impact. While the unit tolerates limited sand exposure, abrasive particles may accelerate wear—so fresh-water flushing is recommended after use in sediment-rich conditions. Its polycarbonate and stainless-steel construction ensures long-term reliability even under high load and sustained immersion.
Note: A compatible cable penetrator is required to waterproof and secure the cable connection to your enclosure. This product uses the Deep-Sea 3-Core (16 AWG) Underwater Cable. Choose a penetrator below that matches your depth and housing requirements. Penetrator options are listed further below.
Cable Penetrator Options
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Note: A compatible cable penetrator is required to waterproof and secure the cable connection to your enclosure. The Blu-Thrust Edge 170 Thruster is supplied with a Deep-Sea 3-Core (16 AWG) Underwater Cable, pressure-rated for 300 m / 984 ft operation when paired with the correct penetrator. Choose an option below that matches your depth rating and housing requirements.
Blu-Sub offers several compatible cable penetrators designed to work with this thruster’s subsea power and signal cable, each suited for different underwater applications:
Deep-Sea Cable Penetrators – Standard, high-pressure design for deepwater, full-depth deployments. Depth Rating: Up to 1,000 m / 3,281 ft
Deep-Sea M10 Gland Cable Penetrators – M10-threaded penetrators with compression glands for secure strain relief and modular housing integration. Depth Rating: Up to 1,000 m / 3,281 ft
Low-Depth M10 Gland Cable Penetrators – Cost-effective, compact solution for shallow-water or low-pressure applications. Depth Rating: Up to 100 m / 328 ft
Compatible Cable Connectors & Coupling Hardware
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About the Cable:
The Blu-Thrust Edge 170 Thruster is supplied with a Deep-Sea 3-Core (16 AWG) Underwater Cable, a rugged subsea cable designed for power and signal transmission to propulsion systems. For modular setups, quick-disconnect capability, or extended cable runs, the following compatible connection options are available:
Deep-Sea Cable Connectors – Female Socket & Male Plug
Inline plug-and-socket connectors that allow the thruster’s cable to be terminated with sealed ends for removable, watertight propulsion connections.
Deep-Sea Cable Connectors – M10 Bulkhead
Panel-mounted connector designed for thruster cable pass-through on enclosure walls or end-caps. Requires a matching plug to form a sealed, high-pressure connection.
Deep-Sea Cable Connectors – Dummy Sealing Cap
Protects unused thruster cable connectors during storage, transport, or inactive operation by sealing off exposed ends against water ingress.
Subsea M10 Coupling Tube
Enables secure inline splicing of thruster cables using penetrators and potting compound.
Compatible Subsea Enclosure Options
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The Blu-Thrust Edge 170 Thruster is supplied with a Deep-Sea 3-Core (16 AWG) Underwater Cable, pressure-rated for 300 m / 984 ft when paired with a compatible cable penetrator. Once the cable is routed into your housing through the chosen penetrator, the thruster can be secured to your ROV frame or mounting structure using its built-in M3 and M6 mounting holes.
Subsea Watertight Enclosure Box
Compact aluminum enclosure rated to 300 m, pre-drilled with twenty M10 ports for penetrator installation—ideal for direct thruster cable pass-through without modification.
Subsea Enclosure Acrylic Tube
Transparent cast acrylic body rated to 250 m, compatible with Blu-Sub aluminum flanges and end-caps. Choose end-caps with penetrator ports to route thruster cables cleanly into the enclosure.
Subsea Enclosure Aluminum Tube
Rugged aluminum tube enclosure rated to 1,000 m. Use with matching deepwater-rated end-caps featuring penetrator ports for thruster cable integration in high-pressure environments.
SHIPPING LIST
TECHNICAL SPECIFICATIONS
| Item | Blu-Thrust Edge 170 Thruster |
| Material & Appearance |
PC Black + Blue (Thruster) PC + Glass Fiber Black (Propellers) PC Blue (Weed Guard & Snap-On Cap) 316 Stainless Steel Inserts |
| Weight |
Thruster: 500 g Propeller Set: 34.2 g Weed Guard: 13.3 g Snap-On Cap: 14.3 g |
| Maximum Rated Depth | 300 m / 984 ft |
| Rated Mechanical Durability | >200 hours |
| Max Power |
Without Weed Guard: 300 W With Weed Guard: 335 W |
| 6S Full Throttle Current |
Forward: 11.9 A Reverse: 12.4 A With Weed Guard FWD: 13.2 A With Weed Guard REV: 13.3 A |
| 6S Full Throttle Thrust |
Forward: 5.6 kgf Reverse: 5.3 kgf With Weed Guard FWD: 3.2 kgf With Weed Guard REV: 3.1 kgf |
| Power Supply Voltage Range | 10 – 25.2 VDC |
| Rated Voltage | 24 V / 6S Battery |
| 24V Thrust Parameters |
FWD: 5.3 kgf / 266 W / 11.1 A REV: 4.6 kgf / 254 W / 10.6 A |
| Temperature Range |
Air: –25 °C to 60 °C Water: –10 °C to 40 °C |
| Mounting Details |
Insert Nut Material: 316 Stainless Steel Mounting Threads: 4 × M3 + 1 × M6 Hole Spacing: 19 × 19 mm |
| Cable |
Length: ≈ 900 mm Spec: 3 × 16 AWG Cable Type: Gland penetrator compatible, pressure-rated for 300 m |
| Motor |
Type: Outrunner Brushless Motor Pole-pairs: 8 KV Rating: ~170 Sealing: Resin-encapsulated, fully isolated, fully sealed |
* Parameters such as mechanical life and thrust are all related to the actual usage environment and mode, and may deviate due to the actual environment.
Full throttle thrust parameters at different voltages:
| Voltage (V) | Forward Thrust (kgf) | FWD Thrust Current (A) | Reverse Thrust (kgf) | REV Thrust Current (A) |
| 26 | 5.9 | 12.5 | 5.6 | 13.1 |
| 24 | 5.3 | 11.1 | 4.6 | 10.6 |
| 22 | 4.7 | 9.7 | 4.4 | 10.5 |
| 20 | 3.9 | 8.5 | 3.9 | 9.3 |
| 18 | 3.2 | 7.4 | 3.3 | 8.2 |
| 16 | 2.8 | 6.4 | 2.9 | 7.1 |
| 14 | 2.3 | 5.2 | 2.3 | 5.9 |
| 12 | 1.8 | 4.3 | 1.7 | 4.8 |
| 10 | 1.4 | 3.2 | 1.3 | 3.7 |
Technical Specifications Continued
Data Curve:
* Thrust parameters are actual test data from Blu-Sub's proprietary test bench. Variations may occur across different test environments due to multiple factors. Due to a slight downward measurement bias in our test platform, data obtained from other test systems may generally be higher than those in this table. Note: When used with the weed guard, power consumption increases while thrust decreases slightly.
24V Thrust Curve:
24V Power Curve:
Wiring Definition:
Rotation Direction, Thrust Direction, and Forward/Reverse Propeller Direction Description:
If you require a pre-installed gland penetrator with a specified cable length, please contact us and provide the A and B dimensions as shown in the figure below. The penetrator is pressure-rated for 300 m and uses an integrated compression plug and sleeve ring for sealing. We will respond with lead times and price implications, as these may be extended for custom wiring lengths. Generally, the combined A + B measurement should be less than 850 mm.
Why are there CW/CCW propellers?
The CW (clockwise) and CCW (counterclockwise) propellers are mirror-image designs used to balance the reactive torque generated by motor rotation. For example, if all thrusters rotate clockwise during forward motion, a counterclockwise reactive force is applied to the vehicle, which can cause undesired rotation. Using a mix of CW and CCW units helps neutralize this effect.
Can the front cap be removed?
No. The front cap is fixed and non-removable, while the rear snap-on cap is designed to be detachable for cleaning or inspection.
Will foreign object insertion or forced blockage cause permanent damage?
Yes. Severe blockage, especially due to debris or entanglement, can burn out the motor or electronic speed controller (ESC), causing permanent damage.
Is it suitable for sandy underwater environments?
The thruster offers some sand resistance, but fine abrasive particles may still enter and cause wear. After operating in sandy conditions, promptly rinse the rotating components with fresh water to minimize friction and prevent long-term damage.
Can it be used in both saltwater and freshwater?
Yes, it is compatible with both. After use in saltwater, promptly soak and rinse with fresh water to remove salt residue and prevent corrosion or mechanical seizure.
What is the service life?
In laboratory testing, the thruster demonstrated over 200 hours of continuous operation in freshwater. Actual lifespan will vary based on water conditions, maintenance, and frequency of use.
Can it operate in air?
Yes. The Blu-Thrust Edge 170 Thruster can operate in air without runtime restrictions.
3D Model Viewer
Note: The 3D model shown above is for reference purposes only. It may include components, accessories, or alternate sizes not included with the product. For simplicity, only a single representative size is typically displayed when multiple versions exist. Please refer to the product Shipping Guide for detailed information on included contents and size-specific differences.
