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Bearing 7211 ACD/P4A (SKF)

Angular contact ball bearings, super-precision 7211 ACD/P4A

Bearing number : 7211 ACD/P4A

Size (mm) : 55x100x21

Brand : SKF

Bore Diameter (mm) : 55

Outer Diameter (mm) : 100

Width (mm) : 21

Bearing dimensions and specification in SKF catalogue:

d - 55 mm

D - 100 mm

B - 21 mm

d₁ - 68.9 mm

d₂ - 68.9 mm

D₁ - 86.1 mm

r_1,2 - min. - 1.5 mm

r_3,4 - min. - 0.6 mm

a - 28.7 mm

d_a - min. - 64 mm

d_b - min. - 64 mm

D_a - max. - 91 mm

D_b - max. - 95.8 mm

r_a - max. - 1.5 mm

r_b - max. - 0.6 mm

d_n - 72.6 mm

Basic dynamic load rating - C - 52.7 kN

Basic static load rating - C₀ - 40.5 kN

Fatigue load limit - P_u - 1.7 kN

Limiting speed for grease lubrication - 13000 r/min

Limiting speed for oil lubrication - 20000 mm/min

Ball - D_w - 14.288 mm

Ball - z - 15

G_ref - 8.595 cm3

Calculation factor - e - 0.68

Calculation factor - Y₂ - 0.87

Calculation factor - Y₀ - 0.38

Calculation factor - X₂ - 0.41

Calculation factor - Y₁ - 0.92

Calculation factor - Y₂ - 1.41

Calculation factor - Y₀ - 0.76

Calculation factor - X₂ - 0.67

Preload class A - G_A - 330 N

Preload class B - G_B - 660 N

Preload class C - G_C - 1320 N

Preload class D - G_D - 2640 N

Calculation factor - f - 1.08

Calculation factor - f₁ - 0.99

Calculation factor - f_2A - 1

Calculation factor - f_2B - 1.01

Calculation factor - f_2C - 1.02

Calculation factor - f_2D - 1.05

Calculation factor - f_HC - 1

Preload class A - 172 N/micron

Preload class B - 224 N/micron

Preload class C - 296 N/micron

Preload class D - 399 N/micron

Mass bearing - 0.613 kg

Tags :  SKF , 55x100x21