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Difference between a 608zz and 608 bearing? Answered

I have started the swap to go to this extruder on my 3D printer. As such, I am taking the time to go ahead and use new bearings. I have a set of eight that came from a [one week old] skateboard someone broke, but they are 608zz. The BOM of the extruder calls for 608.

From what I can see, the only difference is that the 608zz have a plate that covers the ball bearings, versus 608 which appear to be open. Is this true? and if not, what is the difference? Can I use the two interchangeable?

thanks in advance! 

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steveastrouk (author)2015-05-08

Yes, the letters after the numbers designate whether it has shields( metal plates) in plastic or metal, as well as the precision specification. The same looking bearing can cost anywhere from $10 to $300 or more depending on the precision.

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