Recommendation for bearing type by application

[Ford385s]

I'm not an engineer, more of a demented tinkerer...
That said, I am planning a supercharger set up using a Eaton M62 on a V6 Mazda KL 2.5L that requires a drive extension shaft. I'm thinking of using 2 bearings, at the pulley side of the shaft, and another support/line up bearing at the other end before the coupler. The greatest stress will be at the pulley support (planning on using a stock belt tensioner) and I would like to be able to support a shaft rpm of 15k+, while being able to live in an underhood environment.
I've looked at some of the greasable pillow block types and just came across the Pacific-Bearing 'Simplicity' line of mounted linear/rotational self-lubricated bearings but don't know which would be the most dependable/efficient.
Any advice/recommendations would be greatly appreciated.
Thanks

 

[EnglishMuffin]

I can't imagine why you would use that type of bearing for this application, unless I'm missing something. It is intended for relatively low speed and mainly linear travel applications, and can be used to replace Thompson type ball bushings. It wouldn't last long in this application. If its just to carry the belt loads, I would say you probably need some type of sealed grease-lubricated rolling element bearing. Probably, deep groove sealed ball bearings would work, but since I have no idea of the loads I can't help much with the sizing. Much of the load comes from the belt pre-tension.

 

[Ford385s]

Thanks, this was the type of info I'm looking for.
Those Simplicity's were just something I was looking at because the way they are packaged (low-profile) would simplify things, there's not much room under the hood of a Probe GT.
IIRC the max M62 speed is 16krpm and according to what I just found at 16k the shaft will be transfering between 25-35 hp (dependent on boost level). I may use a stock belt tensioner but don't know what kind of force that will apply.
I had thought about those greasable types using Royal Purple Synthetic grease but figured I'd see what kind of recommendation I could find on the board.
I'd rather overbuild then not worry about it.
Thanks Again

 

[jmoritz]

Your rpm on a sealed bearing is going to be limited by the shaft size. You may have to consider low friction seals or shielded bearings instead of full contact sealed bearings. As well, most bearing mfg's pre pack with general purpose mineral oil grease. Synthetic will be a special order - although potentially found somewhere in their global stock system already.

 

[EnglishMuffin]

There are some special "sealed" high speed angular contact machine tool spindle bearings made by FAG which have high speed grease in them. However, they are probably too expensive for this application. Barden, which is now owned by FAG, also have some unique US developed low friction seal designs which are available in deep groove types. I believe some of these can be obtained with high speed grease.