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Loads

Single row deep groove ball bearings
Minimum load

For additional information
Requisite minimum load



Perform calculations

If minimum load cannot be reached, consider preloading.

Axial load carrying capacityPure axial load → Fa ≤ 0,5 C0

Small bearings1) and light series bearings2) → F≤ 0,25 C0

Excessive axial load can lead to a considerable reduction in bearing service life.

Load carrying capacity of matched bearing pairs

The values for basic load ratings and fatigue load limits listed in the product table apply to single bearings. For matched bearing pairs mounted immediately adjacent to each other the following values apply:

  • basic dynamic load rating
    C = 1,62 C single bearing
  • basic static load rating
    C0 = 2 C0 single bearing 
  • fatigue load limit
    Pu = 2 Pu single bearing
Equivalent dynamic bearing load

For additional information
Equivalent dynamic bearing load
Single bearings and bearing pairs arranged in tandem:

Fa/Fr ≤ e → P = Fr

Fa/Fr > e → P = X Fr + Y Fa

Bearing pairs arranged back-to-back or face-to-face:

Fa/Fr ≤ e → P = Fr + Y1 Fa

Fa/Fr > e → P = 0,75 Fr + Y2 Fa

Perform calculations
Equivalent static bearing load

For additional information
Equivalent static bearing load
Single bearings and bearing pairs arranged in tandem:

P0 = 0,6 Fr + 0,5 Fa

P0 < Fr → P0 = Fr

Bearing pairs arranged back-to-back or face-to-face:

P0 = Fr + 1,7 Fa

1) d ≤ 12 mm
2) Diameter series 8, 9, 0, and 1


Stainless steel deep groove ball bearings
Minimum load

For additional
information
Requisite minimum load


Perform calculations

If minimum load cannot be reached, consider preloading.

Axial load carrying capacityPure axial load → 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


Perform calculations
Equivalent static bearing load

For additional information
Equivalent static bearing load
P0 = 0,6 Fr + 0,5 Fa

P0 < Fr → P0 = Fr
Single row deep groove ball bearings with filling slots
Minimum load

For additional information
Requisite minimum load



Perform calculations

If minimum load cannot be reached, consider preloading.

Axial load carrying capacityFa ≤ 0,6 Fr

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 ≤ 0,6 and P ≤ 0,5 C0 → P = Fr + Fa


Perform calculations
Equivalent static bearing load

For additional information
Equivalent static bearing load
Fa/Fr ≤ 0,6 → P0 = Fr  + 0,5 Fa


Double row deep groove ball bearings
Minimum load

For additional information
Requisite minimum load



Perform calculations
Axial load carrying capacityPure axial load → Fa ≤ 0,5 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


Perform calculations
Equivalent static bearing load

For additional information
Equivalent static bearing load
P0 = 0,6 Fr + 0,5 Fa

P0 < Fr → P0 = Fr

Symbole

C0=statische Tragzahl [kN]
  • single bearings (→ product tables)
  • matched bearing pairs (→ Load carrying capacity of matched bearing pairs)
dm=mittlerer Lagerdurchmesser [mm] = 0,5 (d + D)
e=Grenze für das Belastungsverhältnis je nach Verhältnis f0 Fa/C0
(table 1, table 2)
f0=Berechnungsfaktor (s. product tables)
Fa=Axialbelastung [kN]
Fr=Radialbelastung [kN]
Frm=Mindest-Radialbelastung [kN]
kr=Minimallast-Faktor (→ product tables)
n=Drehzahl [min-1]
P=die äquivalente dynamische Lagerbelastung [kN]
P0=die äquivalente statische Lagerbelastung, N
X=der Radialfaktor des Lagers (table 1)
Y, Y1, Y2=Berechnungsfaktor für die Axialbelastung in Abhängigkeit von f0 Fa/C0 (table 1, table 2)
ν=die tatsächliche kinematische Viskosität des Schmierstoffs bei Betriebstemperatur [mm2/s]
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