Homebuilt ROVs Forum

hi, i want to build underwater arm that will be part of small submarine.
i have a few questions:
What should i use in a depth of 300 meters- Actuators?Servo motors?
What's easier to seal? What is more water resistant?

At 300 meters, the water pressure will be approx 400 psi, so you would need to use a shaft seal or o-rings to seal any shafts or rods extending through the pressure bulkhead.

The method to move the arm will depend on how heavy it is, and how much clamping pressure you want.

Rover

these graphite reinforced ptfe seals can take the abuse and pressures.
http://www.mcmaster.com/#mechanical-seals/=qh6nqq