Can anyone tell me the bearing frequencies for a SKF 460228 triple race bearing. It does not show up in CSI's database. And how will the frequencies differ with the triple race?

Jim,
Skf has a nice site, however I didnt find frequencies for your bearing listed.

http://www.skf.com/skf/productcatalogue/calculationsFil...prodid=&action=Calc6

This link will take you to the "CONTACT US" site where a phone number for technical services division is listed. This is the route I have gone and they have been good at getting me the info. http://www.skf.com/portal/skf_us/home/contactus?lang=en#

This link will give you some info about the triple ring bearings, looks like there are a couple configuration designs depending on cylindrical / spherical.
http://www.skf.com/portal/skf/home/products?newlink=1_2...g=en&maincatalogue=1

I have no experience with these bearings, but it looks like it is basically 1 bearing on top of another, I would think you would have 2 different sets of fault frequencies depending on whether it is the inner or outer set of rollers the defect is on.

Hope this helps, tis all I got
Mike

This message has been edited. Last edited by: MikeH,

Mike,
Thanks for the info. I Called Tech Services and the're looking into it.

Triple Race Bearings? That's new for me and I've been around for few.

It's not acurate, but try using alternate bearings until SKF can get back to you with actual freqencies (copy and Paste to a TXT file):

BEARING FREQUENCIES FOR SKF 460230 INNER
****************************************


PHYSICAL DATA
-------------
Number of Balls/Rollers : 18
Ball/Roller Diameter : 55.0000
Pitch Diameter of Races : 397.810
Contact Angle (Degrees) : 12.8
Inner Race Rotating : Yes

SHAFT TRAIN SPIN OUTER INNER
HARMONICS SPEED (FTF) (BSF) (BPFO) (BPFI)
--------- ----- ----- ----- ------ ------

1 1.00 .433 3.55 7.79 10.21


BALL/ROLLER SPIN (BSF) INNER RACE PASS (BPFI)
HARMONICS PLUS 1xFTF SIDEBANDS PLUS 1xRPM SIDEBANDS
--------- ---------------------- ----------------------

1 3.55 10.21
3.12 3.98 9.21 11.21
2.69 4.42 8.21 12.21

--------------------------------------------------------------------

Frequencies in Orders

BEARING FREQUENCIES FOR SKF 460230 OUTER
****************************************


PHYSICAL DATA
-------------
Number of Balls/Rollers : 41
Ball/Roller Diameter : 36.0000
Pitch Diameter of Races : 590.270
Contact Angle (Degrees) : .0
Inner Race Rotating : Yes


SHAFT TRAIN SPIN OUTER INNER
HARMONICS SPEED (FTF) (BSF) (BPFO) (BPFI)
--------- ----- ----- ----- ------ ------

1 1.00 .470 8.17 19.25 21.75


BALL/ROLLER SPIN (BSF) INNER RACE PASS (BPFI)
HARMONICS PLUS 1xFTF SIDEBANDS PLUS 1xRPM SIDEBANDS
--------- ---------------------- ----------------------

1 8.17 21.75
7.70 8.64 20.75 22.75
7.23 9.11 19.75 23.75

--------------------------------------------------------------------

Frequencies in Orders

Ref: CSIBrg.dat

Come to find out, the bearing had been changed to a Torrington F3828C without anyone being notified. That bearing is in CSI's data base. It still just has inner and outer race frequencies. Not sure about the 3rd race. Evidently these bearings are mostly used in Paper Mills on Swim Rolls for Calendar stacks.