The word preload is not best in world on any thing.?
?
Most will over titeon.??
Some manuals I had said tieon till finger back off one two notch on bearing retain nut and so bear spins .?
?
If you over titeon the bearing it will stop? (it needs room for heat expansion).?
?
FYI Most mini lathe have a class 1 ball bearing. It better to have class 3 or greater. I found class 8 is just over kill and very costly too
?
Dave?
davesmith1800