uxcell MR128-2RS Deep Groove Ball Bearings 8mm Inner Dia 12mm OD 3.5mm Bore Double Sealed Chrome Steel Blue Seal Z2 10pcs

I know these state they are ABEC 1 spec, but I swear they feel much better than that! I use them in a product I'm working on that I printed on my 3D printer, and have them, in some cases, in relatively small gears (ø~20mm). PLA is very lightweight (so no flywheel effect here), but these small gears spin very nicely with these bearings inserted. I was so impressed with them that I ordered a few more sets. Recommended product.

Used these bearings for the output shafts of the tank. They fit perfectly into the lower hull and virtually eliminated the considerable slop in these shafts. I expect them to reduce detracking problems with the tank. Would buy again. Definitely worth the money.

If you own an AIPER Surfer S1 and the bearing are seized these work great. I have a salt water pool and the bearing seized after 6 months. These fit and work great. AIPER needs a new design.

This was bought for a project. The problem for me isn't a product problem (As I got them to work and well- but loading was going to be a problem) but I bought just a bit too small. Worked smoothly, but I'm concerned about load against the bearings, etc. They won't be used for the project they've been bought for- but they WILL be used elsewhere. That's how good they are.

Good bearings at a good price, the quality seems good

I needed to replace my band saw guide bearings and these were a good replacement for the originals

I got these to replace unsealed bearings in a Udirc Rc Porsche. These and the the others I ordered(will also review) fit perfect and are so smooth and will keep dirt out. Have 2 cars so just bought another set of each.

Hubby approved