angular contact bearings - back to back, further apart

[dsc]

John, wouldn't a tube cause more problems, if it's length is not super precise?

I was asking about tolerances on the bearing fits, as I'm not quite sure how ACs are normally fitted. I've seen interference fits mentioned a few times in technical literature and I can understand that on the bottom bearing, but should the top bearing be an interference fit as well? the bottom can be easily pressed against the shoulder, so that's not an issue, but I guess the top should simply slide over the shaft? if so, isn't there a risk of the shaft rotating within the top bearing inner ring? I guess preload would create friction between the top of the inner ring and locknut / cap, but is that enough?

Regards,
dsc.

[johnsattuk]

John, wouldn't a tube cause more problems, if it's length is not super precise?

I have been talking about collapsible tubes as used extensively in some applications.

Because your tubes would be relatively long a pair of thin wall aluminum tubes would compress the amount needed, a bit of trialing to get the right combination of force/distance needed, perhaps a bit OTT for you.

[johnsattuk]

Oldish American video, they call it a crush sleeve.

Setting pinion bearing preload on the Ford 8.8" axle - YouTube11193

LAND ROVER FREELANDER REAR DIFF DIFFERENTIAL COLLAPSABLE BEARING CRUSH SPACER | eBay