TRB RC 1/4x3/8x1/8 Flanged Precision Ball Bearings ABEC 5 Hybrid Seals (10)

I have the original release of the gold pan, and these will fit the standard wheels without issue. Gave more life to the antique I've been restoring.

They are bearings and do turn pretty smoothly. Probably fine if used with 3-D printed plastic parts and bolts for shafts. But I was using precision drill rod for a shaft and out of 10 bearings, one was a sloppy fit, one was easy sliding , one fine close sliding fit and the other 7 were some degree of press fit (more than I could do with my thumb). While a close fit is desirable, these bearings are so small I wouldn't want much of an interference fit. But then the the bearings all had a lot of play, so slightly expanding (short of breaking of course) the inner race with a press fit might not be all that bad, at least not until one need to remove bearing for replacement (which might be sooner rather than later)

Used to make a hand crank. Smaller than I pictured in my head, so I'm surprised how well they're holding up to the task. Smooth and well made. I'd love to see how they're manufactured.

I used these for my college project where we designed an air engine that ended up being spun to 9000 rpm and held up well. Be aware though that the inner part of the bearing is supposed to be the press fit not the OD.

Good product, the inside diameter is slightly undersized but it can be press fit on a 1/4" rod.

Fits the Team Associated rc10 perfectly.

Works as well as bearing I used to buy at less than half the price.

Exactly what I needed with quick delivery.