For small craft in board electric motors, how do they design the dripless
shaftseals ? Any reference material online? Thanks

"Eisboch" wrote in message
...

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