Need to Match 2.375-Inch Diameter Shaft to Split Base Type Pillow Block Mounting

Depending on several factors, maybe you can cool/freeze the shaft and heat the 2.36 inch ID bearing with a tourch. That'd give you a nice tight fit when things go back to room temp.

Next simplest, a bushing to go over the shaft with a 2.48 finished OD.

You could put a (possibly shrink fit) sleeve over the shaft, but I think you'd need a bigger bearing--I don't think a sleeve of 0.039" thickness would be practical.

Or, yo"flame spray", then turn it down to 2.438"--I think that would be more practical.

Hmm, something got mangled there--it was supposed to say: Or, you could build up the shaft with weld or "flame spray", then ..."

There are a couple options I can see, rhkramer already mentioned one that I think is your best option, have a shaft sleeve machined.

Another would be to locate a vendor that carries a bearing to fit your situation. (I haven't purchased bearings in a few years, but SDF has huge product line and they've performed well for me.)

The last would be to simply scrap the pillow and buy a new bearing and block (and take note of which one it is so you can buy replacement bearings in the future).

I wouldn't recommend trying to shim any type of moving part.

For this seesaw type action (as opposed to continuous rotation), 0.039 of shim stock should be okay. Another option would be to turn your shaft down to 2.360-.

I think I'll try to use your idea Tornado. Although this is going to be a testing apparatus, it will not see a lot of use, nor does it have high rotational stress on it. I like the latin signature. The first part was made a little famous in the movie Tombstone, where Doc Holliday says: In vino veritas, very true! thank you

Mach1GTX

I would think that a bushing would be an easy cure. But I would recommend going to 2.5" or bigger on the bearing.That would make the bushing more substantial, and would allow set screws to anchor it to your shaft. Good luck.

Have you considered a taper sleeve bearing? They can accommodate slight over/under size shafts.

I'm not familiar with bearings much at all and am just now getting into them. What I have to do is not my favourite thing, but part of this test rig I'm putting together. Does a tapered sleeve bearing cause undue wear on the bearing or mating surfaces?

No, once the taper sleeve is locked in place the bearing takes all the stress. They will accommodate slight shaft size variance. I like them, simple to fit, easy to remove, what more could you want?

..............well, uh, I was hoping you could send me the setup? Just kidding, thanks Tony! How are things across the pond?

WET! A typical English summer where I live.

mach1qtx, depending on shaft RPM & loading, you made able to simply use a tolerance ring. Here is the website for USA Tolerance Rings www.usatolerancerings.com . Paul

Interesting that imperial sizes have become a little more difficult to find, but yes, that is exactly the way to go.

if the use is just a rocking motion, which by the way is the severest motion for wear, and it is very light duty, you could also do without the bearing. Just get an oil impregnated bronze bushing that has the right diameter. press it into a drilled hole in the right place. it actually needs to be a press fit. then bore the bushing to the proper dia. if you want the shaft horiziontal and just a few inches of the working surface, then make a T block or an L block. drill holes in it for mounting down to the working surface and the press fit hole for the bushing. the press fit will decrease the diameter of the id.

that is why it will need to be bored. always. this is for a non high speed operation. the bushing should last many years.