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Boucher
07-04-2009, 02:08 PM
I have several ingoits of Babbitt bearing material which are stamped:
9 5 SN 13SB 7507 This came from an old Cable Tool driller that used it to run it in cable sockets. These had to be refurbished at 100 hrs run time. The old rigs most likely had some babbitt bearings also. Trying to decipher this, I think it may be grade 13 which has 5%Tin, 10% Antimony, and 83% Lead. Would this be used as bearing material?

barts
07-04-2009, 03:33 PM
I have several ingoits of Babbitt bearing material which are stamped:
9 5 SN 13SB 7507 This came from an old Cable Tool driller that used it to run it in cable sockets. These had to be refurbished at 100 hrs run time. The old rigs most likely had some babbitt bearings also. Trying to decipher this, I think it may be grade 13 which has 5%Tin, 10% Antimony, and 83% Lead. Would this be used as bearing material?

Yes. Keep the maximum load down to 500 psi (load on bearing / projected surface area of bearing (diameter * length)), and the speed should not exceed 1000 ft/min.

- Bart

mwechtal
07-04-2009, 09:52 PM
I have several ingoits of Babbitt bearing material which are stamped:
9 5 SN 13SB 7507 This came from an old Cable Tool driller that used it to run it in cable sockets. These had to be refurbished at 100 hrs run time. The old rigs most likely had some babbitt bearings also. Trying to decipher this, I think it may be grade 13 which has 5%Tin, 10% Antimony, and 83% Lead. Would this be used as bearing material?
Could that be 9.5 SN 13SB? The scientific symbol for Tin is Sn, and Antimony is Sb.

Boucher
07-05-2009, 12:41 AM
Mike, I think you are right. I forgot the sb symbol for antimony. There is a grade 13 and I took off following the analysis for that. Thanks for the help.