Timken Super Precision Bearings for Machine Tool Applications

Appendix
TS Inch Style
FTF: Fundamental Train Frequency: the frequency at which the
cage will operate.
BSF:
Ball Spin Frequency: the frequency at which a single defect
on a rolling element will be detected.
BPFO: Ball Pass Frequency Outer: the frequency at which a single
defect in the outer race will be detected.
BPFI:
Ball Pass Frequency Inner: the frequency at which a single
defect in the inner race will be detected.
AD
Part Number FTF-Inner (1) BSF BPFO BPFI FTF-Outer (2)
29585-29520 0.452 4.935 11.742 14.258 0.548
399A-394A 0.443 4.191 9.740 12.260 0.557
29685-29620 0.455 5.251 12.277 14.723 0.545
34301-34478 0.450 4.734 10.789 13.211 0.550
497-493 0.448 4.606 10.307 12.693 0.552
LM718947-LM718910 0.452 4.970 11.303 13.697 0.548
52400-52618 0.452 4.935 11.745 14.255 0.548
68462-68712 0.450 4.749 11.251 13.749 0.550
36690-36620 0.472 8.597 20.286 22.714 0.528
36990-36920 0.477 10.260 23.829 26.171 0.523
87750-87111 0.457 5.592 13.253 15.747 0.543
67985-67920 0.470 7.996 19.283 21.717 0.530
543085-543114 0.473 8.987 19.868 22.132 0.527
(1) For inner ring rotation.
(2) For outer ring rotation.
A
TIMKEN MACHINE TOOL CATALOG 219