Loads
| Deep groove ball bearings | Cylindrical roller bearings |
Minimum load For additional information → Requisite minimum load |
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Axial load carrying capacity |
Pure axial load → Fa ≤ 0,5 C0 Small bearings1) and light series bearings2) → Fa ≤ 0,25 C0 Excessive axial load can lead to a considerable reduction in bearing service life. | – |
Equivalent dynamic bearing load For additional information → Equivalent dynamic bearing load |
Fa/Fr ≤ e → P = Fr Fa/Fr > e → P = X Fr + Y Fa |
P = Fr |
Equivalent static bearing load
For additional information → Equivalent static bearing load |
P0 = 0,6 Fr + 0,5 Fa P0 < Fr → P0 = Fr |
P0 = Fr |
1) d ≤ 12 mm
2) Diameter series 8, 9, 0, and 1
Symbols
C0 | basic static load rating for deep groove ball bearings [kN] (→ product table) |
dm | bearing mean diameter [mm]
= 0,5 (d + D) |
e | limiting value for deep groove ball bearings depending on the relationship f0 Fa/C0 (table 1) |
f0 | calculation factor for deep groove ball bearings (→ product table) |
Fa | axial load [kN] |
Fr | radial load [kN] |
Frm | minimum radial load [kN] |
kr | minimum load factor → product tables: |
n | rotational speed [r/min] |
nr | reference speed for cylindrical roller bearings [r/min] (→ product table) |
P | equivalent dynamic bearing load [kN] |
P0 | equivalent static bearing load [kN] |
X | radial load factor for deep groove ball bearings (table 1) |
Y | axial load factor for deep groove ball bearings depending on the relationship f0 Fa/C0 (table 1) |
ν | actual operating viscosity of the lubricant for deep groove ball bearings [mm2/s] |