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So I’ve looked all over the internet to find an anatomy picture of a thru axle hub, because I don’t understand where the bearings go, and I can’t find anything helpful.
Can anyone help me understand where the bearings are in a thru axle hub? Maybe show a picture. I just want to know.
You can look at diagrams of any hub. Through-axle bearings are basically in the same places as on quick release hubs. On a through axle hub the bearings, and the hollow axle, are simply of greater diameter than on a quick release hub.
Googling 'through axle hub bearing' provided a number of diagrams for me.
Googling 'through axle hub bearing replacement' for videos also got some interesting results. Try this one from Park Tool where they disassemble a TA hub with loose rather than cartridge bearings.
Many thru axel designs use cartridge bearings, which are not servicable (one replaces the cartridge bearing-- no more loose balls smushed in a greased filled cup and held in place by adjusting a cone nut). Here and Here are schematics from Shimano of a rear and front hub featuring thru axels. This particular model uses caged bearings, and I've selected this for clarity as the bearing balls are obvious and not hidden within a cartridge package.
