uxcell 4pcs SG22 U Groove Track Guide Bearing 8x22.5x14.5mm GCr15

Absolute life saver part for my Elegoo Neptune 4 Pro. After months of weird waves in my prints - finally found the culprit! Bad “U” bearing on the underside of the print head causing the x axis to vibrate. I replaced it with one of these & I haven’t seen prints this smooth in forever it feels like. This is a hard to find part for some reason but inexpensive & works perfectly.

Made a wire straightener out of these. The finish is smooth and it rolls like silk. I do not understand the other reviews unless they had a bad batch but I have purchased a lot of Uxcell products and generally they are good quality at a good price.

Great product and fast shipping

I first used 3 of these U-groove bearings for a shop-made table saw fence that ran on the edges of 1/4" thick hot-rolled mild steel angle. The polymer bearings I tried first had too much slop, but that problem went away when I switched to these. The vendor's image does not show all dimensions, so I've provided a sketch here. The groove radius on my diagram is approximate (hard to measure) and may well be 5.0 mm. Being steel-on-steel, they're a bit noisy when rolling but I really like the accuracy of my fence. I also expect to use these bearings in a roll-out kitchen cabinet shelf unit that carries about 50 lbs, and I think they will do well. The first set (qty 8) I received had one damaged bearing where the rubber seal had fallen out and become bent in packaging. I only needed this one replaced, but since Amazon was tasked with handling such problems, my only remedy was to return the entire set in exchange for another. It would have been cheaper for everyone if they could have just sent me a single replacement, but such is life.

Very smooth operation. Use 6mm axle for excellent tracking/securing.

there was a bunch of play I would say probably about 2° of play in wobble between the ball bearing the inner race and the outer race it was no good luckily I had ordered a different brand as well and they were fine but I ordered two boxes of this brand and they were no good

Worked great

The bearings are of decent quality, however the dimensions given in the web page are slightly off. They are slightly narrower than shown. The ID, OD, and channel are correct.

Estoy satisfecho.

Perfect quality product. Excellent for making a skill saw track slide.

Worked perfectly to make a bed slide for my truck. Fit inside 1” c channel and rolled smoothly Will update review after some use

Aún no los utilizo, pero se ven de buena calidad, seguramente si serean una buena compra

Perfect item to fix z height consistency on a neptune 4 pro 3d printer.