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Bearing 7221 CD/P4A (SKF)

Angular contact ball bearings, super-precision 7221 CD/P4A

Bearing number : 7221 CD/P4A

Size (mm) : 105x190x36

Brand : SKF

Bore Diameter (mm) : 105

Outer Diameter (mm) : 190

Width (mm) : 36

Bearing dimensions and specification in SKF catalogue:

d - 105 mm

D - 190 mm

B - 36 mm

d₁ - 131.2 mm

d₂ - 131.2 mm

D₁ - 163.8 mm

r_1,2 - min. - 2.1 mm

r_3,4 - min. - 1.1 mm

a - 37.9 mm

d_a - min. - 117 mm

d_b - min. - 117 mm

D_a - max. - 178 mm

D_b - max. - 183 mm

r_a - max. - 2 mm

r_b - max. - 1 mm

d_n - 138.4 mm

Basic dynamic load rating - C - 172 kN

Basic static load rating - C₀ - 153 kN

Fatigue load limit - P_u - 5.3 kN

Limiting speed for grease lubrication - 7500 r/min

Limiting speed for oil lubrication - 12000 mm/min

Ball - D_w - 26.988 mm

Ball - z - 15

G_ref - 48.333 cm3

Calculation factor - f₀ - 14.5

Preload class A - G_A - 650 N

Preload class B - G_B - 1300 N

Preload class C - G_C - 2600 N

Preload class D - G_D - 5200 N

Calculation factor - f - 1.08

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 - 129 N/micron

Preload class B - 174 N/micron

Preload class C - 243 N/micron

Preload class D - 349 N/micron

Mass bearing - 3.868 kg

Tags :  SKF , 105x190x36