i know a guy... no really, Timken is currently the world leader in tapered roller bearing and essentially wrote the book on design and optimization of them. I agree, brands like SKF, FAG, Koyo all make quality product and focus very heavily in certain markets, product types, etc. Up thru the 80's Timken was THE tapered roller bearing company, and started getting heavy pressure in the automotive bearing market from companies like NSK, NTN, Koyo with good internal geometry, high quality Japenese steel, and their Japanese approach to margins, etc. which lead to the launch of one of Timken's high performance bearing lines in the 80's called P900. If you look at the fit an finish of a lot of these smaller size Timken wheel, differential, and transmission bearings you can see that surface finish looks really good, compared to larger industrial bearings, that my be ground instead of honed.
In the case of roller and raceway surface finishing, there is grinding, honing, and super finishing. A lot of the Timken product is super finished in this size range based on how their manufacturing lines are setup. It doesn't make sense to change the setup on high volume lines all the time to run all levels so a lot of these are upgraded to the better performance parts.
I'm not sure if I'm allowed to link to things like this, but I can remove if not.
Articles like Tapered Roller Bearing Performance for 1990's often include Timken internal bearing life test results, competitor product testing, or testing results from independent third parties.
I'm not saying I have one specific set of data, or definitive test that says this JLM104948/910 is xx percent better than Koyo's. Just adding some of what I know about roller bearings, Timken, and some of their competitor product.
In the case of roller and raceway surface finishing, there is grinding, honing, and super finishing. A lot of the Timken product is super finished in this size range based on how their manufacturing lines are setup. It doesn't make sense to change the setup on high volume lines all the time to run all levels so a lot of these are upgraded to the better performance parts.
I'm not sure if I'm allowed to link to things like this, but I can remove if not.
Articles like Tapered Roller Bearing Performance for 1990's often include Timken internal bearing life test results, competitor product testing, or testing results from independent third parties.
I'm not saying I have one specific set of data, or definitive test that says this JLM104948/910 is xx percent better than Koyo's. Just adding some of what I know about roller bearings, Timken, and some of their competitor product.
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