Originally Posted by Nailhead
That may well be, but it still doesn't make an abundance of sense to me given that axle shafts aren't made of bearing steel.
Not that I like it, look how many bike/car/truck motors spin their overhead cams directly on their aluminum heads - no bearings other than an oil film...
always wondered about dry starts after oil changes, running low on oil, etc
oil film, remember-- those cams aren't (shouldn't be) actually touching the metal of the bearing itself.
That axle shaft is subject to an unpressurized "catch-as-catch-can" splash oiling system in contrast.
Not a big confidence builder given what'll happen if that bearing fails.