Your question is not specific. Are you referring to plummer-blocks or just the bearings used?
I do not know of any disadvantages bearings would pose.
Plummer-blocks are used to help the bearings rotate. Its a mechanical component. You could only compare it with a similar product providing same function as to which is better.
But independently the plummer-blocks do not have any disadvantages.
You could visit www.smrhousings.com to see what plummer-blocks are
The price
The 'key block'
Ball bearings come in a wide range of sizes from really tiny to really big. That less-than-specific answer reflects the less-than-specific question. There are a variety of ball bearings out there, and you can always specify a custom size if you can't find one off the shelf that suits you.
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A pillow block, also known as a plummer block or housed bearing unit, is a pedestal used to provide support for a rotating shaft with the help of compatible bearings & various accessories.
it used to rotate the bearing
in the block
There is really no difference between the two. Although it seems common practice that the plummer blocks are split, with bolt on caps.
The average cost of pillow block bearings is around $45 dollars a piece. You can shop for prices at www.autozone.com for your specific vehicle.
Cam bearings are pressed into the block therefore there is NOT an adjustment.
Both are same only, pillow block to to separate the parts in top to bottom, in plummber block can change only housing and bearing only.
Pillow block bearings can be found online at a lot of websites for sale. A few of the websites where one could buy pillow block bearings include eBay, Amazon, and Lowe's.
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It is heavy and might damage bearings
Theoretically, yes.
On the main bearings, .001, to .003.