Taper bearing - shaft fit

[321GO]

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/productcatal...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.

 

[Tmoose]

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.

 

[GregLocock]

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


New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

 

[321GO]

Found it myself, thanks anyway.