HSLA RB-80 steel used in Unground Bearing Outer Raceways 1

[dougs1967]

Has anyone ever heard over unground bearings using outer raceways manufactured from HSLA steel. Any input appreciated. I have put forth alot of effort into actual life/load dynamic testing and comparing to standard bearings using low carbon grade steel stamped outer races that have been case hardened with basically no success even at 1/2 load rating applied to HSLA outer races. Bearings are running at 60 surface feet a minute for comparative testing, both grease and oil have been run still no success on HSLA. Heavy ball paths are worn into the HSLA. Thoughts anyone?

 

[MikeHalloran]

You're making bearing races from HSLA without case hardenng, and you're expecting results other than early failure?

Why?


Mike Halloran
Pembroke Pines, FL, USA

 

[dougs1967]

This is something that upper mgt. has been having me test. The results are less than desireable. I need to clarify the HSLA we are using is not heat treated after stamping the raceways.

 

[Tmoose]

page A55 here -

http://www.ntnamericas.com/en/websi...gs/needle_roller_bearings_2300-vii_lowres.pdf

general bearing race material pressure limits in attachment, from INA catalog 307

 

[MikeHalloran]

We need smarter frogs.


Mike Halloran
Pembroke Pines, FL, USA

 

[dougs1967]

Mike,

Unfortuneately.....where they at?

 

[MikeHalloran]

It's a punch line; look it up.


Mike Halloran
Pembroke Pines, FL, USA

 

[dougs1967]

I know, just playin......