It's a design feature. The way they have the oil pump set-up on the pro saws, it's pretty much a necessary feature that the bearing contains the seal.
But really if you think about it, it's a good thing. It keeps ham-handed techs from ruining the case when installing new seals. At the very worst,
they'll ruin the bearing and that's a lot less to replace than the entire crankcase.
I agree. In the years I worked at dealerships, the number of customers willing to pay for an entire rebuild was a tiny fraction, less than 1%. Most would just junk the
saw when the bearings were bad and buy a new one. Timber cutters, logging company owners, and professional tree service companies would just keep the old
saw for parts and buy a new one of the same model.
One tip though- if you guys are putting new bearings in an 044 or 440, just use the PTO side bearing from the 460. It's same bearing used in the 024/026/260, 034/036/360, 046. The 044/440 PTO side bearing retails for $50 and the 046/460 bearing retails for $30.