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Danny Harvey

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Does anyone have bearing data for a Timken NA438.

I've got nothing in CSI, SKF or on Timkens site.
JohnJ

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Reply with quote  #2 

Not sure what the NA is, but a 438 is a cone with the following defect numbers.

BPFI - Ball or Roller Pass Frequency - Inner 9.373    
BPFO - Ball or Roller Pass Frequency - Outer 6.627    
BSF - Ball or Roller Spin Frequency 2.792    
FTFI - Fundamental Train Frequency - Inner Rotation 0.414    
FTFO - Fundamental Train Frequency - Outer Rotation 0.586   


Regards,
John J
John from PA

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Quote:
Originally Posted by JohnJ

Not sure what the NA is, but a 438 is a cone with the following defect numbers.

Regards,
John J


For Timken, NA refers to two inner races mated with double outer race to form double row non-adjustable bearing.
RustyCas

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Reply with quote  #4 
(you guys are amazing)
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Danny Harvey

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Reply with quote  #5 
Thanks for the info. It was very helpful.


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