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

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.

These salvaged our zip line, which has been neglected by the kids because it no longer zipped. The new bearings where a perfect fit, and the zip line works perfectly now.

Excellent product ! They are very smooth with very little slack in any direction

Dislike fact soap was not included

Its not actually a deep V. Its more comparable to a u groove.

I used these on a farmhouse door build. The ball bearings made the doors slide effortlessly and the V-groove on the pulleys kept the pulley centered on the rail.

Todo fue perfecto.graciad.

Good size but are u groove not v groove like advertised

Bought these to replace one I had that wore down. These worked great so far. The kids have only used the zip line a few times since Ive replaced it with these so time will tell us on the longevity.

These are awesome bearing pillows. Thank you.