Probably self lubricating but I guess the ability to do so might vary between models.
Off the designers website:
‘Another thing I have done with this design is to only use inexpensive, common off the shelf parts. This allows NanoSeeker to remain extremely affordable.’
It’s quite worrying if you think about it
What if a certain female was to possess such thruster
Headlines………………………………
Woman rushed to hospital as vibro goes missing
Or
Man medivacted off platform by helecopter whilst ROV broken down !
Wanton theft of company equipment
So what’s it looking for, does it have a sonar/camera.
Maybe a doppler for auto pos. and DP, just for enormous flexibility in autonomous behavior of this vehicle.
Few ribs in the payload module for her pleasure than!