SKF 7220CD/P4A bearing

Angular contact ball bearings, super-precision 7220 CD/P4A

Bearing number : 7220 CD/P4A

Size (mm) : 100x180x34

Brand : SKF

Bore Diameter (mm) : 100

Outer Diameter (mm) : 180

Width (mm) : 34

Bearing dimensions and specification in SKF catalogue:

d - 100 mm

D - 180 mm

B - 34 mm

d₁ - 124.7 mm

d₂ - 124.7 mm

D₁ - 155.3 mm

r_1,2 - min. - 2.1 mm

r_3,4 - min. - 1.1 mm

a - 35.9 mm

d_a - min. - 112 mm

d_b - min. - 112 mm

D_a - max. - 168 mm

D_b - max. - 173 mm

r_a - max. - 2 mm

r_b - max. - 1 mm

d_n - 131.4 mm

Basic dynamic load rating - C - 156 kN

Basic static load rating - C₀ - 137 kN

Fatigue load limit - P_u - 4.9 kN

Limiting speed for grease lubrication - 7500 r/min

Limiting speed for oil lubrication - 12000 mm/min

Ball - D_w - 25.4 mm

Ball - z - 15

G_ref - 40.899 cm3

Calculation factor - f₀ - 14.5

Preload class A - G_A - 590 N

Preload class B - G_B - 1180 N

Preload class C - G_C - 2360 N

Preload class D - G_D - 4720 N

Calculation factor - f - 1.09

Calculation factor - f₁ - 1

Calculation factor - f_2A - 1

Calculation factor - f_2B - 1.01

Calculation factor - f_2C - 1.03

Calculation factor - f_2D - 1.05

Calculation factor - f_HC - 1

Preload class A - 122 N/micron

Preload class B - 165 N/micron

Preload class C - 230 N/micron

Preload class D - 331 N/micron

Mass bearing - 3.242 kg