"Anderson, M." wrote in message
...
Can you tell me how to prevent water going in through the drive shaft?
This will be under water line and submersed area.
Is there any special water proof bearing used?
How does that work?
Thank you?



If you are talking about a standard shaft seal, it is supposed to leak very
slightly, meaning a few drops per min. to provide lubrication and cooling to
the seal. The shaft seal packing occasionally needs replacment and the
packing nut occasionally will require an adjustment as the packing wears.
If the packing nut is too tight and there are no drips, you run the risk of
burning up the shaft seal.

There are dripless shaftseals available that will not drip. They require
water cooling lines to operate.

Eisboch