uxcell 627ZZ Ball Bearing 7mm x 22mm x 7mm Double Shielded 627-2Z 80027 Deep Groove Bearings, Carbon Steel (Pack of 20)

Exactly as described just wish the quantity per order could be adjusted when purchased. The bearings are excellent just more than needed.

Working a project that needed exactly these.

These bearings (693ZZ (3*8*4)) were used to replace the bearings in a quadcopter motor. they seem louder that the other bearings. The ones that were being replace were damaged from a crash so these are an improvement over the damaged ones. Just spinning the blades by hand result in about 2 turns of the new bearings vs about 6 to 8 turns of the blades on the other motors. Perhaps these will "wear in" but the others did not need this activity. They seem strong and smooth but I think they may be a bit "tight" for a high speed quad motor.

Normally I don't like ZZ seal bearings. I prefer RS so the seal can be taken out and grease added. For my project no additional grease was needed so these worked perfect.

These bearing are advertise as 1/8" or 3mm ID. But what you get is 15/128" or 2.95mm which if you are using these for any rotary burr tools, it won't fit for just that small amount of precision. Picture shows that the burr tool's shank get stuck right after first 5 or 6 mm and won't go further. If the ID is as advertised at 3mm, it would have been a perfect fit.

probably for some type of assembly line

The product is ok for the bargain.pro:-the size is accurate.-good for simple projects.-competitive price.cons:-TOOK 2.5 WEEKS!! to ship to Canada.-not smooth bearings as you would expect.-doesn't feel as durable as the quality goes, comparing to other products I purchased through amazon.-the middle circle (frame) is not aligned correctly. (see the image)I did not try them yet, but these are my first impressions about the product so far.

Hola ..el producto es excelente lo usé para micromotor dentalLe daría las cinco estrallas pero se calientan un poco al ponerlo en función

les bearings sont trop petit

Good