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Bearings types difference

Posted by Yaro

Yaro

Bearings types difference
October 01, 2014 07:57AM

Registered: 9 years ago
Posts: 26

Hi,
I want to ask what is difference between 2RS and ZZ bearing. First use 2 rubber seals second metal shield, but why first type cost a lot more than zz? have some advantages?

Edited 1 time(s). Last edit at 10/01/2014 07:57AM by Yaro.

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danny500

Re: Bearings types difference
October 02, 2014 02:42AM

Registered: 9 years ago
Posts: 1

\the quality of the first one is better than the other that's why it is expensive than the other !

danny

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Traumflug

Re: Bearings types difference
October 02, 2014 04:48AM

Registered: 13 years ago
Posts: 7,616

These metal shields are apparently easier to manufacture. Metal shields aren't entirely tight, either, but they do withstand higher temperatures and show less friction.

No matter what shield you use, the bearing it's self is always exactly the same.

Generation 7 Electronics	Teacup Firmware	RepRap DIY

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andornot

Re: Bearings types difference
October 04, 2014 06:58AM

Registered: 10 years ago
Posts: 97

The 2RS are sealed for life bearings i.e. the grease within the bearing cannot get out or contaminants get into the bearing and damage it. The ZZ are just a metal shield to stop larger contaminants damaging the bearing. Other than that the bearings are identical, it all depends what environment you are using the bearings for.

Regards

Andrew