Fidget Spinner Caps and R188 Bearings Set - Replacement Parts for Fidget Spinner - Caps and Bearings Pack - 1 pair of SS Buttons and 2 SS 10-ball R188 bearings - Caps perfect for R188 bearings

I'm not exactly sure how I found myself in the rabbit hole of fidget spinners, but here I am, fascinated with the search for the ultimate bearings.I use a heavy Tyzest copper tri-spinner for all of my bearing tests. This spinner has a way of exaggerating bearing noise. These bearings are above average with six plus minute spin times. (my best bearing 《not these》gives me ten plus minutes). I knocked off one star because they are very noisy at high rpms. I haven't tried cleaning them yet. When I do clean them, I will update to let you know if they get quieter.The caps are nice enough and are well machined.I expect that my box of spare parts will grow in the near future. I have some ceramic bearings coming in soon to examine and test.

I bought this pack to fix up several different spinners (one that I really liked but had uncomfortable endcaps, and one that arrived with rusty bearings). This pack managed to fix all three easily (also swapped in a new bearing for the endcap replacement). I'm not an expert on bearings, but they seem a little smoother than normal, and the rusty bearing replacement spins beautifully. The endcaps screw together nice and securely, and have a good concave surface that is smooth and feels so much better than the low-grade endcaps on cheaper metal spinners. One thing to note, though, is that the endcap dimensions seem designed to work with metal spinners that aren't too thick - as an experiment, I tried them out on a rudder-style spinner, and screwed together they were too tight for it to spin properly. Other than that, though, this is a great little kit, and one of the few quality ones I've found for fixing up R188-bearing spinners.

Out of the box these bearings were noisy, felt rough and did not spin long. I used my standard procedure for stainless bearings. First spray they clean with brake cleaner followed by several blasts from a can of air. Angle the sprays so that they spin the bearings in the process. Once that was done these are very quiet bearings and spin well. They went from 3 minute spins out of the box to 8 minute spins after cleaning. If they are like other quality bearings I have in a couple spinners I expect the spin times will increase as they wear in.

I am not sure if i got a bad set but I am in no way getting more than 2.5 min of spin time on this set. They look well made and i did the standard cleaning procedures and such. But At most I get 2 min to 2min 30 seconds or so. I am not really happy this set and a bit disappointed in the descriptions saying 4 min - 6 min spin times.

Not too bad. Wish it would have been a bit cheaper than ten bucks...But it added about 30 seconds to one of my spinners when I replaced the noisy stock bearings, and the cap is significantly classier than the plastic caps I have that are interchangeable.

The bearings are of poor quality and the knobs are too small and short for most spinners.Not recommended.

Worked really well! Bearings spin forever and buttons were smooth and sexy.

Like the spinner caps but the bearings are terrible.