PGN - UCP205-16 Pillow Block Mounted Ball Bearing - 1" Bore - Solid Cast Iron Base - Self Aligning (4 Pack)

The media could not be loaded. I got these a to replace the cheap pillow bearings that wear out every other year on my swamp/evaporative cooler. They were wide enough to fit on the rail in my mastercool (1.5" wide), and a drill bit away from having new bolt holes. It made the squirrel cage about 1/4" higher, but no issues with airflow from that. My cooler only spins at a max of 2100rpms which is far below the max these are rated at.All that I added were the M10 bolts and nylock nuts. I'll update this review over time and if anything changes.For my cooler upgrade application:Pros: - 2 grub set screws per bearing - Pre aligned bores - grease zerk with protective caps (will see how long those last) - Sealed pillow bearings on each side so the grease doesn't just fling out - Nicely machined 1" bore - Pre greasedCons: - No additional hardwareOther: - Because I was using these in a very different application, not surprised bolt holes didn't line up with old cheap swamp cooler pillow bearings. So this means you'll need to drill some holes in your rail to make it fit with proper bolts.

These mike at 25 mm not 1 inch (25.4 mm). I’ll have to machine shafts a bit, but they’re so inexpensive, it’s worth the effort.

These are definitely very sturdy. But check what you receive closely, and right away. I checked one and it was good. I missed the return window by two days. Out of four, only one had the bearing pressed in close to straight. If you look at the one in front, that is out of whack by about .25 inches. If you look closely at the mounted one right behind it, you can see that the bearing on the left isn't inline either. Nor is the bearing on the right. Only the one in back is close. Close but not perfect. I'm giving three stars because I think it would be a good product but quality control is lacking.

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Quality, amazing price.