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Yep, I thought long and hard about it. I put an inner ring spacer between each bearing to try and get them to load share. To be safe, bearing manufacturers generally recommend you do not exceed 25% of the static load rating in axial force. The bearing I have selected has a 45kN (approx 10,100 lbf), so with two bearings load sharing (a big assumption), I should have around 22KN (5000 lbf) of axial load capacity. Will it be enough? Time will tell I guess. What I learnt with the Barracuda bearing design was they never seemed to fail due to load - they were always full of crap due to ineffective sealing by relying on sealed bearings (they don't seal much at all). With my mid-board, I made sure I had good double lip seals in the design. Adds a shit tin of drag though. If it all goes to custard, there are a couple of Timken tapered rollers I have my eye's on, but I doubt they will be cost effective. They are also not a direct replacement - I will have to manufacture new components. Timken L522148WV/L522110V would be ideal. Timken L623149/L623110 could be a close second.
The bearings we were discussing are the huge ones that are in the mid board hubs,not the reverse unit.
Sort off. Every time I do, I realize how much work there is to do. Anyway, she is rolling.