Waterproof Brushless Motors — Underwater Thrusters

The actuators are constructed from either Stainless Steel 316 (SST 316) or Titanium, both of which offer excellent resistance to seawater corrosion. Titanium is the preferred choice for the most demanding long-duration deployments due to its superior corrosion resistance and high strength-to-weight ratio.

No. The self-compensated linear and rotary actuators have all logic and driver circuitry integrated within the housing. They communicate directly via RS422 or RS232 serial protocols at 19200 baud, making them fully standalone and easy to integrate into ROV tether management systems without additional control hardware.

Self-compensated models feature a 30-bit absolute multi-turn encoder (14-bit single-turn resolution plus a 16-bit turns counter) mounted on the output shaft. This encoder retains position information between power cycles. The Trunion 1000N and 60,000 N Force models use a rotary resolver on the motor shaft for precise closed-loop feedback.

Axial force ranges from 1,000 N (220 lbs) up to 77,500 N (7,000 lbs) for linear actuators. The 60,000 N Force model delivers up to 50,000 N at high speeds of 200 mm/sec. The rotary actuator provides a nominal continuous torque of 27 Nm (19 ft·lbf) at a 238:1 gear ratio and 30 RPM output shaft speed.

The Trunion 1000N and 60,000 N Force linear actuators use Seacon underwater connectors, which are industry-standard for deep-sea reliability. The self-compensated linear and rotary actuators use MCBH8M Subconn 8-pin underwater connectors, with the linear model including a 12-inch MCIL8F whip for streamlined integration.

These actuators serve ROV and AUV systems, offshore oil and gas subsea valve and pipeline control, marine research and oceanographic instrumentation, deep-sea robotics and manipulators, and underwater infrastructure maintenance including water tank cleaning robots. They are globally supplied and suitable for both commercial and scientific deep-sea deployments.