Review on Uxcell V Groove Bearings 3Mmx10Mmx3Mm Miniature by Quintin Gore

I used some of these grooved pulleys to create my own manual guide to control how I wind the magnet wire onto a spool using a spool winder. Not only do they guide the magnet wire perfectly, but they also reduce a lot of the friction normally caused by hands. I bought 10 of these pulleys but only needed 5 because I wasn't sure if some of them would work properly. As it turned out only 1 had some internal issues, the rest worked fine. As you can see in the picture I used some nylon posts with some small bolts, washers and nuts to attach them to my mount. They look good, I'm very happy with them!