>> P.483
K0.20.5151050100150Sliding velocity Vmm/sFig. 3 Oscillating angleFig. 4 Sliding velocity factor for lubrication type PILLOBALLs[2]Life calculationThe life of lubrication type PILLOBALLs can be calcu- 2 Life of maintenance-free type PILLOBALLsPHS … EC・POS … EClated by the following equations.[1]Conrmation of pV valueK34Before attempting to calculate the life, make sure that the operating conditions are within the permissible range by referring to the pV diagram in Fig.5. When the operating conditions are out of the permis-sible range, please consult IKO. The contact pressure p and sliding velocity V are obtained from equations (3) and (4).125102050100200Sliding velocityVmms/Fig. 5 pV diagram for maintenance-free type PILLOBALL Rod EndsPermissible range806040201068421mm2/NpContact pressureG= dkβ P√￣￣( )3.18b1b2b3 2 Cdt ×105 ……………(5)Lh= G 60f ……………………………………(6)where, G:Life (Total number of oscillations) b1:Load directional factor (Refer to Table 8.) b2:Lubrication factor (Refer to Table 8.) b3:Sliding velocity factor (Refer to Fig. 4.)Cdt: ynamic load capacity considering temperature increase,N(Refer to equation (1).) P:Equivalent radial load,N (Refer to equation (2).) Lh:Life in hours,h f Number of oscillations per minute, min-1Table 8 Load directional factor b1 and lubrication factor b2 for lubrication type PILLOBALLsLoad directional factorb1Load directionLubrication factorb2Periodical lubricationConstantAlternate15None1Regular15etanretlAnoitceriddaoLtnatsnoCnoitceriddaoL8345210.50.40.30.20.10.05b3Sliding velocity factorOscillating angleOscillating angle
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