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

Great

Center bore is 1/16 smaller that the 1/4 that is states. True measurement is 3/16.

Solid bearings. Being used on a neighborhood zip line outdoors. After 2 months they’re holding up great.

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

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.

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!

Work just as expected and timely delivery!

Not 7mm as described. When another reviewer said it fits a 1/4 inch bolt well, that is because it IS a 1/4 hole.

Our zip line OEM bearings were so cheap that they were worn out after less than three months of very light use. These units made our line faster and smoother than new. Haven’t had them long enough to report on longevity.

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.