Formulas to Calculate Bearing Frequencies (inner race rotating and our race stationary)
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1 Formulas to Calculate Bearing Frequencies (inner race rotating and our race stationary) RPM - Revolutions Per Minute S - Revolutions per secord or relative speed difference between inner and outer race (1) FTF - Fundamental Train Frequency BPFI - Ball Pass Frequency of Inner ring BPFO - Ball Pass Frequency of Outer ring BSF - Ball Spin Frequency Bd - Ball or roller diameter Nb - of balls or rollers Pd - Pitch diameter Ø - Contact angle
2 DEEP GROOVE BALL BEARINGS
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5 632/ / / / / /
6 / / /
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10 MAXIMUM CAPCITY TYPE BALL BEARINGS BL BL2/ BL BL2/ BL BL BL BL BL BL BL BL BL BL BL BL BL BL BL BL BL BL3/ BL BL3/ BL BL3/ BL BL BL BL BL BL BL BL BL BL BL BL BL BL
11 BL
12 ANGULAR CONTACT BALL BEARINGS
13 B B B B B B B B B B B B B B B B B B B
14 7220B B B B B B B B B B B B
15 B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B B
16 DOUBLE ROW ANGULAR CONTACT BALL BEARINGS
17
18 SELF ALIGNING BALL BEARINGS
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20
21 CYLINDRICAL ROLLER BEARINGS INCLUDES N, NJ, NF AND NUP SERIES NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU
22 NU NU10/ NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU204E NU205E NU206E NU207E NU208E NU209E
23 NU211E NU212E NU213E NU214E NU215E NU216E NU217E NU218E NU219E NU220E NU222E NU224E NU226E NU228E NU230E NU232E NU234E NU236E NU238E NU240E NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU
24 NU NU NU NU NU NU NU NU NU NU NU2204E NU2205E NU2206E NU2207E NU2208E NU2209E NU2210E NU2211E NU2212E NU2213E NU2214E NU2215E NU2216E NU2217E NU2218E NU2219E NU2220E NU2222E NU2224E NU2226E NU2228E NU2230E NU2232E NU2234E NU2236E NU2238E NU2240E NU NU NU NU NU
25 NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU2304E NU2305E NU2306E NU2307E NU2308E NU2309E NU2310E NU2311E NU2312E NU2313E NU2314E NU2315E NU2316E NU2317E NU2318E NU2319E NU2320E
26 NU2324E NU2326E NU2328E NU2330E NU2332E NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU304E NU305E NU306E NU307E NU308E
27 NU310E NU311E NU312E NU313E NU314E NU315E NU316E NU317E NU318E NU319E NU320E NU322E NU324E NU326E NU328E NU330E NU332E NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU NU
28 SPHERICAL ROLLER BEARINGS N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N
29 N10/ N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N204E N205E N206E N207E N208E N209E N210E
30 N212E N213E N214E N215E N216E N217E N218E N219E N220E N222E N224E N226E N228E N230E N232E N234E N236E N238E N240E N N N N N N N N N N N N N N N N N N N N N N N
31 N N N N N N N N N N2204E N2205E N2206E N2207E N2208E N2209E N2210E N2211E N2212E N2213E N2214E N2215E N2216E N2217E N2218E N2219E N2220E N2222E N2224E N2226E N2228E N2230E N2232E N2234E N2236E N2238E N2240E N N N N N N
32 N N N N N N N N N N N N N N N N N N N N N N N N N2304E N2305E N2306E N2307E N2308E N2309E N2310E N2311E N2312E N2313E N2314E N2315E N2316E N2317E N2318E N2319E N2320E N2322E
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