Skip to main content

Replies sorted oldest to newest

Soumya Mishra,

Quote: "Is it possible to see Ball spin frequency in a angular contact ball bearing without cage frequency.

I am bothered about the envelope spectrum of a vertical pump DE bearing. It shows prominent harmonics of the BSF but no Cage frequency is present in the spectrum."

It probably is possible to not see FTF in the data, but.....

What I seem to see, in your date, is more of a possible, 3x BSF (which might not really be a 3x BSF but something else) having harmonics and sidebands of an "unknown origin", rather than a 1x BSF with harmonics.

Is it possible this is a different brand bearing rather than an SKF?

Thanks,

Ralph

Attachments

Files (1)
@Registered Member posted:

Soumya Mishra,

Quote: "Is it possible to see Ball spin frequency in a angular contact ball bearing without cage frequency.

I am bothered about the envelope spectrum of a vertical pump DE bearing. It shows prominent harmonics of the BSF but no Cage frequency is present in the spectrum."

It probably is possible to not see FTF in the data, but.....

What I seem to see, in your date, is more of a possible, 3x BSF (which might not really be a 3x BSF but something else) having harmonics and sidebands of an "unknown origin", rather than a 1x BSF with harmonics.

Is it possible this is a different brand bearing rather than an SKF?

Thanks,

Ralph

Dear Ralph,

Thank you for your reply.

I went through your comments, however since the frequency order is 7.25 (Non harmonic) , I couldn't find any other  source of the above frequency.

Nearest frequency is VPF which is  in Order 5.

The bearing is of SKF make

Last edited by Registered Member
@Registered Member posted:

Dear Ralph,

Thank you for your reply.

I went through your comments, however since the frequency order is 7.25 (Non harmonic) , I couldn't find any other  source of the above frequency.

Nearest frequency is VPF which is  in Order 5.

The bearing is of SKF make

Soumya,

I am just wondering about the data showing in the attached DOC file.

I am just a curious guy, I guess.

Thanks and Have a Great Day,    Ralph

Attachments

Add Reply

Post
×
×
×
×
Link copied to your clipboard.
×