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

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

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

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

Work just as expected and timely delivery!

These are awesome bearing pillows. Thank you.

These bearings are a perfect replacement for the nylon pulleys that are at the top of the mast on my sailboat! Im looking forward to raising and lowering my sail with ease!

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

Dislike fact soap was not included