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Split Case Pillow Block Bearings - Disassembly?


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  #1  
Old 02-05-2016, 10:54:48 PM
dalmatiangirl61 dalmatiangirl61 is offline
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Default Split Case Pillow Block Bearings - Disassembly?

Anyone know anything about split case pillow block bearings? I'm looking at a set of 6+" diameter pillow block bearings and need to see about getting the shaft between them out. Is the bearing split also? Or do you split the cases and then have to press bearings off the shaft? I'm hoping the bearings split.......
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Old 02-06-2016, 09:07:28 AM
Rob Charles Rob Charles is offline
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Default Re: Split Case Pillow Block Bearings - Disassembly?

The ones I worked on were in the 4 1/2" range. The cases were split and the bearings were not. The idea is you press the bearings onto the shaft and then drop the assembly down into the housings. Sorry it's not what you want to hear. Rob
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Old 02-06-2016, 10:22:13 AM
Pauls Welding Minnesota Pauls Welding Minnesota is offline
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Default Re: Split Case Pillow Block Bearings - Disassembly?

Take the cap off one of them to have a look, you might get lucky and it will be the bearing with a tapered sleeve that pulls into the bearing id with a big nut with the tang washer behind it. Bend lock tangs up hammer and punch in notches to loosen nut then drive sleeve back until it releases.
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Old 02-06-2016, 11:06:53 AM
tdmidget tdmidget is offline
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Default Re: Split Case Pillow Block Bearings - Disassembly?

It sounds like it might be spherical roller bearings. If you are after the pillow blocks and bearings then there is a procedure to install. You must find from the manufacturer a spec on the clearance reduction. You measure the clearance and force it up the taper until you achieve the required reduction. It will probably have a tapered sleeve but the taper can machined with shaft.

---------- Post added at 08:06:53 AM ---------- Previous post was at 08:02:20 AM ----------

I posted before I intended to. To remove them you remove the locking nut. There should be a grease fitting somewhere on the large side of the taper or a hole to put one in. With a hand grease gun pump until the bearing pops off. Be careful, it can be pretty violent and a bearing that size can hurt.

Does this board have an edit function?
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Old 02-06-2016, 06:33:07 PM
dalmatiangirl61 dalmatiangirl61 is offline
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Default Re: Split Case Pillow Block Bearings - Disassembly?

Thanks guys! Pulled the bearings this morning, fortunately I did not have to worry about pulling the shaft, turns out its just 6" tubing and thin wall stuff, so not enough weight to worry about. One of the local mfr's makes all sorts of crazy test jigs with expensive parts, then scraps them. These are monster bearings, tipped the scale at just under 600 lbs for the pair
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Old 02-06-2016, 10:54:34 PM
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Default Re: Split Case Pillow Block Bearings - Disassembly?

Those are known as BMF bearings. Should be worth a few bucks.
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Old 02-07-2016, 12:04:48 AM
dalmatiangirl61 dalmatiangirl61 is offline
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Default Re: Split Case Pillow Block Bearings - Disassembly?

Had to look these up because somehow I've never heard of Craft bearings. Need to look at them again Monday, but it looks like these are a split case, split bearing design, made in America, and pretty pricey.
http://www.craftbearing.com/
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Old 02-07-2016, 12:10:56 AM
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Default Re: Split Case Pillow Block Bearings - Disassembly?

You scored. Hope you can peddle them at a good price.
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