Stainless Steel 5mm Deep U Groove Ball Bearings Pack of 2, Pulley Bearing Wheel Rail Ball Bearings Wheel

I used these pulleys for the 1/4 rope on my automatic swimming pool cover. I was not sure it was going to work when I received them because the U groove is shallow (Not deep as advertised) however, it seems to function well. I am satisfied with the product.

Its working

Great product, rolls well, no wobble, precision made, would buy again for this and other projects. Highly recommend. Also really nice a 1/4 inch stainless steel bolt fit just right.

The bearing I just received (S608z) seems to be of nice quality (maybe a 4 or a 5). Seems tight and good finish. But the dimensions listed arent close to actual. The bearings I just received had an outside diameter of 31.5mm, and a width on outside of shoulders of 12mm (10.43mm for width of rotating pulley). The shaft appears to be closer to .25 (6.4mm). And depth of groove is 2.8mm. Maybe size doesnt matter (no joke intended), but not sure why you would put dimensions in a listing if they arent right.

Good size but are u groove not v groove like advertised

The bearings seem to be of good quality and should work well for our intended purposes.

they work very good I am very well pleased with them.

So much better than the original ones. My zip line is up and running again.

One of the bearings on our backyard zipline had froze up with rust over the years and this replaced it perfectly. Zipline is working great again. Just make sure the measurements match what you need.

Used these on the mast of a sailboat. Perfect fit. It helped that the dimensions were clearly shown in a photo. Bearings rotate smoothly.