Cool video , I was wondering have you had any problems with water on the outside of the bearings
No. Those bearings will not let water in. You can pressure wash them at 1,500 psi and they won't let water in - I do it all the time on equipment that uses the same bearings. These bearings, unlike the chincy tapered roller bearings and lip seals used on trailer spindles, are designed specifically for severe duty applications where the bearing spends its entire life running in dust, dirt and water.
On the mainshaft I used SKF extended race angular contact ball bearings (expensive - $47 each - and rated for both high axial and radial loading). The PTO shaft has normal SKF ball bearings rated for high radial load and 50% of the max radial load on axial loads.
People get all excited about "drag" in wind turbine bearings - some even go to the extreme of leaving the seal out of tapered roller bearing sets on turbines built with trailer spindles because they're worried about the "drag". This is pretty ridiculous and here's the facts:
The rotating torque with new set of bearings in this transmission is 8 lb-inches. At 100 input rpm that's .013 hp or 9.7 watts required to turn the geartrain. At 200 rpm - .026 hp, or 19.4 watts required to turn the gear train. At 400 input rpm the geartrain absorbs roughly 40 watts. It takes about 100 hours of break-in time on these units and the rotating torque drops to around 3-4 lb-inches.
But even with a new machine, if you're worried about 8 lb-inches of torque to turn the machine, then you're building hobby turbines that don't make any power anyway and you may as well leave the grease out of the bearings too because that causes "drag". If you don't have enough wind to overcome 8 lb-inches of startup torque on a 3 meter machine, then you're wasting your time building a wind turbine in the first place.
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Chris