That is interesting about the pressures and seals. I don't expect you to give me a whole physics lession here on the forum, but is there anywhere you can suggest that I might learn more about this phenomenon? Like some bearing company's whitepaper, or a mechanical engineering journal or something? I can imagine that as a bearing heats, or due to a venturi effect, then you could get positive pressure in the bearing, which would lift the seal lip, but it seems that would be finite and would stop once the bearing reached equilibrium with the surrounding environment, which would return it to it normal (higher) amount of drag. It also seems like it would result in a vac in the bearing once it returned to a static state, which could end up sucking in water if it were present at the seal lip at that time, or if the seals were sufficient to hold the vac then it means that the seal lift effect would diminish with repeated use. Splitting hairs here, I know, but geeking out on this stuff can be fun.hambini wrote: ↑Tue Feb 20, 2018 7:40 pmAs the balls rotate inside the bearing they are causing a fluctuation in air pressure and hydraulic pressure. When the pressures get too much the seal will deflect away from the inner race for them to equalize.
NSK is about the same as FAG and SKF.
This whole industry is a bit incestuous as a lot of them share production lines. Hambini
Regarding the incestuous nature of the bearing industry, I have often been struck by the fact that, in order to be in the business, it seems to be a requirement to have a 3 letter acronym as your name. Maybe there is a reason for this, like easy printing on tiny products or something, but it is striking, and holds true even across many international borders.