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Taper bearing - shaft fit

Taper bearing - shaft fit

Taper bearing - shaft fit

(OP)
Hello chaps,

again another dump bearing question from this bearing newbie.

I'm in the process of determining the fit of  taper bearing on it's shaft. The application is a truck wheel bearing, two bearing, back to back.

On SKF.com taper bearing don't seem to be mentioned separately. I gues the 'radial table' applies, and thus a g6 fit would follow(please see the middle of the page).  

http://www.skf.com/portal/skf/home/products?newlink=1_0_74&lang=en&maincatalogue=1

This would result in a transition fit because SKF taper bearings have -25mu tolerance on the inner bore, pls see link.

http://www.skf.com/skf/productcatalogue/jsp/viewers/tableViewer.jsp?tableName=1_0tt10.tab&maincatalogue=1&lang=en

Now, this makes me wonder, isn't a taper bearing alway 'loose'?

Furthermore when on the NTN website they DO mentioned a specific table for taper bearings, which does indeed has a loose fit, please check table 7.7(1) on the pdf.

http://www.ntnamerica.com/pdf/2200/brgfits.pdf


Again, any input is highly appreciated.

 

 

RE: Taper bearing - shaft fit

Do the inner rings or outer rings rotate? That sets the stage for what ought to be tight, and what can be loose. Compromises are sometimes required after that.

RE: Taper bearing - shaft fit

You can't use a ball bearing fit for taper roller bearings and expect much success.

I'm pretty sure the Timken application notes go through the analysis for a pair of wheel bearings, or at least my 30 year old paper copy does.

Cheers

Greg Locock


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