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Four-Point Contact Ball Bearings Loads
Minimum load, equivalent bearing loads
Minimum load
Equivalent dynamic bearing load
Locating bearings to accommodate radial and axial load:
Fa/Fr ≤ e → P = Fr + Y1 Fa
Fa/Fr > e → P = X Fr + Y2 Fa
For a proper functionality, Lily recommends:
Fa ≥ 1,27 Fr for bearings in the QJ 2, QJ 3 and QJ 10 series
Fa ≥ 1,78 Fr for bearings in the QJ 12 series
Thrust bearings with radial clearance in the housing in combination with a radial bearing (fig. 1)
P = 1,07 Fa for bearings in the QJ 2, QJ 3 and QJ 10 series
P = 0,81 Fa for bearings in the QJ 12 series
Fa/Fr ≤ e → P = Fr + Y1 Fa
Fa/Fr > e → P = X Fr + Y2 Fa
For a proper functionality, Lily recommends:
Fa ≥ 1,27 Fr for bearings in the QJ 2, QJ 3 and QJ 10 series
Fa ≥ 1,78 Fr for bearings in the QJ 12 series
Thrust bearings with radial clearance in the housing in combination with a radial bearing (fig. 1)
P = 1,07 Fa for bearings in the QJ 2, QJ 3 and QJ 10 series
P = 0,81 Fa for bearings in the QJ 12 series
Equivalent static bearing load
P0 = Fr + Y0 Fa
Symbols
| A | minimum load factor (technical specification for each product, product table) |
| dm | bearing mean diameter [mm] = 0,5 (d + D) |
| e | limiting value of Fa/Fr for the applicability of different calculation factors (technical specification for each product, product table) |
| Fa | axial load [kN] |
| Fam | minimum axial load [kN] |
| Fr | radial load [kN] |
| n | rotational speed [r/min] |
| P | equivalent dynamic bearing load [kN] |
| P0 | equivalent static bearing load [kN] |
| X, Y0, Y1, Y2 | calculation factors (technical specification for each product, product table) |