Originally Posted by
ZAGNUT
the case does need to be sealed well and standard contact seal bearings don't always cut it. only reliable way to use these is to leave both seals in place and rely on the grease for lube.........................................
Are standard pre-packed and sealed bearings rated to the revs we are interested in here? The Stihl will develop it's max power at around 9000 rpm.
However, I am more interested in the open bearing option combined with an external seal and housing. The shaft appears to be plenty long enough and it would be a simple machining job.