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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 capacity	Pure axial load → F_a ≤ 0,5 C₀ Small bearings¹⁾ and light series bearings²⁾ → F_a≤ 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 C_{0 single bearing} fatigue load limit P_u = 2 P_{u single bearing}
Equivalent dynamic bearing load For additional information → Equivalent dynamic bearing load, P	Single bearings and bearing pairs arranged in tandem: F_a/F_r ≤ e → P = F_r F_a/F_r > e → P = X F_r + Y F_a Bearing pairs arranged back-to-back or face-to-face: F_a/F_r ≤ e → P = F_r + Y₁ F_a F_a/F_r > e → P = 0,75 F_r + Y₂ F_a Perform calculations
Equivalent static bearing load For additional information → Equivalent static load	Single bearings and bearing pairs arranged in tandem: P₀ = 0,6 F_r + 0,5 F_a P₀ < F_r → P₀ = F_r Bearing pairs arranged back-to-back or face-to-face: P₀ = F_r + 1,7 F_a

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 capacity	Pure axial load → F_a ≤ 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, P	F_a/F_r ≤ e → P = F_r F_a/F_r > e → P = X F_r + Y F_a Perform calculations
Equivalent static bearing load For additional information → Equivalent static load	P₀ = 0,6 F_r + 0,5 F_a P₀ < F_r → P₀ = F_r

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 capacity	F_a ≤ 0,6 F_r Excessive axial load can lead to a considerable reduction in bearing service life.
Equivalent dynamic bearing load For additional information → Equivalent dynamic bearing load, P	F_a/F_r ≤ 0,6 and P ≤ 0,5 C₀ → P = F_r + F_a Perform calculations
Equivalent static bearing load For additional information → Equivalent static load	F_a/F_r ≤ 0,6 → P₀ = F_r + 0,5 F_a

Double row deep groove ball bearings

Minimum load For additional information → Requisite minimum load	Perform calculations
Axial load carrying capacity	Pure axial load → F_a ≤ 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, P	F_a/F_r ≤ e → P = F_r F_a/F_r > e → P = X F_r + Y F_a Perform calculations
Equivalent static bearing load For additional information → Equivalent static load	P₀ = 0,6 F_r + 0,5 F_a P₀ < F_r → P₀ = F_r

Symbols

C₀	basic static load rating [kN] single bearings (→ product table) matched bearing pairs (→ Load carrying capacity of matched bearing pairs)
d_m	bearing mean diameter [mm] = 0,5 (d + D)
e	limit for the load ratio depending on the relationship f₀ F_a/C₀ (table 1, table 2)
f₀	calculation factor (→ product table)
F_a	axial load [kN]
F_r	radial load [kN]
F_rm	minimum radial load [kN]
k_r	minimum load factor (→ product table)
n	rotational speed [r/min]
P	equivalent dynamic bearing load [kN]
P₀	equivalent static bearing load [kN]
X	calculation factor for the radial load (table 1)
Y, Y₁, Y₂	calculation factors for the axial load depending on the relationship f₀ F_a/C₀ (table 1, table 2)
ν	actual operating viscosity of the lubricant [mm²/s]