Hi
I have 20 of these bearings already.
Was wondering if they would work for a MPCNC or if I need to buy the extract ones in the BOM?
Thanks!
They are the same size, but the shielding is different. Without doing a bunch of digging I suspect they’ll fit and probably work. I think yours have similar shielding to the bearings on my roller skates, optimized a bit more for low friction than good sealing. Bearings are pretty easy to clean if needed, but I would wonder about trying to actually get them out of the machine to clean them.
Edit: After a bit more digging, ZZ refers to double shielded, 2RS is double sealed. Shielded keeps big chunks out, but dust will still get in, sealed is…well…sealed. Shields can be popped out for easy cleaning, but I would not want to regularly disassemble the thing to clean 53 bearings.
Thanks everyone for the advice.
Now I just need to find the cheapest way to get 53 of the 2RS 's to Canada 
Honestly, the shop here is about the cheapest I’ve seen, although that’s for the US.
Ebay is probably worth a look, I got stupid cheap electronic components there for other projects.
Be careful with extremely cheap bearings. I bought some “RS” bearings from Amazon and they were very rough and the “seals” were worse than ZZ.
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I then got Ryan’s recommended bearings and they have been worth every penny.
You don’t necessarily get what you pay for, but you won’t get what you don’t pay for, I guess.
Did you get theses ones https://aax-us-east.amazon-adsystem.com/x/c/Qn5GB9pycV4O-cfnGe0K3ZoAAAFp-BUe4AEAAAFKAbbABuM/https://assoc-redirect.amazon.com/g/r/https://amzn.to/2xah39e?linkCode=w61&imprToken=MxSVigwVZM2YMil0rHP5zw&slotNum=6
Yes, those are the good ones I purchased (6 packs of 10) to replace the crap ones I got initially.
I have purchased bearings from FUSHI via their aliexpress store and they seem to be good, in spite of being quite affordable. I would buy from them again. Shipping was relatively fast, too (considering).
I agree that 2RS are a better choice for this application than ZZ:
For my MPCNC, I bought them from Adam, and of course they are good quality. I know that importing things inexpensively into Canada is an issue, though.
