>> P.481
KTable 4 Recommended fits ConditionNormal operationShafth7Directionally indeterminate loadingn6,p6Tolerance classHousing bore(1)H7N7Note(1) his is applicable to PILLOBALL Spherical Bushings, Insert type. ■Selection of PILLOBALLLoad capacities of PILLOBALLs are determined based on the allowable contact pressure on sliding surfaces and the strength of body for each type. Thus, a suitable type and size should be selected based on the dynamic load capacity Cd and static load capacity Cs shown in the dimension tables.Load capacity 1 Dynamic load capacityThe dynamic load capacity Cd is obtained on the basis of the contact pressure on the sliding surface. The dynamic load capacity is used for calculating the life.The dynamic load capacity considering temperature increase is obtained from the following equation using the temperature factor, which is a correction factor for the effect of PILLOBALL temperature.Cdt=ft Cd……………………………………(1)where, Cdt: Dynamic load capacity considering temperature increase,N ft:Temperature factor (Refer to Table 5.) Cd: ynamic load capacity,N (Refer to the dimension tables.)Fig. 1 Shapes of grease nipple■AccuracyThe accuracy of PILLOBALLs is shown in Tables 2 and 3. The maximum radial internal clearance of the insert type is 0.035 mm.Table 2 Toleranceunit: mmType DimensionDimension symbolTolerancePBPHS(…A)POS(…A)PHS … ECPOS … ECPHSBPOSBPHSABore dia. of inner ringOutside dia. of outer ringWidth of inner ringWidth of outer ringBore dia. of inner ringWidth of inner ringBore dia. of inner ringWidth of inner ringBore dia. of inner ringWidth of inner ringdDBCdBdB1dBH7h6 0-0.1±0.1H7 0-0.1+0.038-0.013 0-0.127+0.063-0.012See Table 3. Table 5 Temperature factorftTable 3 Tolerance of width B of inner ring of PHSA typeunit: mmdNominal bore dia. of inner ring∆BsDeviation of a single inner ring widthOver-1420Incl.142022High000Low-0.2-0.3-0.4■FitTemperature℃Type-30+80+80+90+ 90+100+120+150+100+120+150+180PBPHS(…A),POS(…A)PHSB,POSBPHS … ECPOS … EC11111110.70.90.750.55- 2 Static load capacityThe static load capacity Cs is the maximum static load that can be applied on the PILLOBALL without break-ing the inner or outer ring of the PILLOBALL Spherical Recommended fits for PILLOBALLs are shown in Bushing (or the inner ring or body of the PILLOBALL Table 4.Rod End), and without causing severe permanent deformation that will make the PILLOBALL unusable.K32
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