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Bearing 71911 ACD/P4A (SKF)

Angular contact ball bearings, super-precision 71911 ACD/P4A

Bearing number : 71911 ACD/P4A

Size (mm) : 55x80x13

Brand : SKF

Bore Diameter (mm) : 55

Outer Diameter (mm) : 80

Width (mm) : 13

Bearing dimensions and specification in SKF catalogue:

d - 55 mm

D - 80 mm

B - 13 mm

d₁ - 62.7 mm

d₂ - 62.7 mm

D₁ - 72.3 mm

r_1,2 - min. - 1 mm

r_3,4 - min. - 0.3 mm

a - 22.4 mm

d_a - min. - 59.6 mm

d_b - min. - 59.6 mm

D_a - max. - 75.4 mm

D_b - max. - 78 mm

r_a - max. - 1 mm

r_b - max. - 0.3 mm

d_n - 64.7 mm

Basic dynamic load rating - C - 18.2 kN

Basic static load rating - C₀ - 13.7 kN

Fatigue load limit - P_u - 0.585 kN

Limiting speed for grease lubrication - 15000 r/min

Limiting speed for oil lubrication - 24000 mm/min

Ball - D_w - 7.938 mm

Ball - z - 23

G_ref - 2.49 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 - 120 N

Preload class B - G_B - 240 N

Preload class C - G_C - 480 N

Preload class D - G_D - 960 N

Calculation factor - f - 1.15

Calculation factor - f₁ - 0.98

Calculation factor - f_2A - 1

Calculation factor - f_2B - 1.04

Calculation factor - f_2C - 1.08

Calculation factor - f_2D - 1.14

Calculation factor - f_HC - 1

Preload class A - 124 N/micron

Preload class B - 161 N/micron

Preload class C - 211 N/micron

Preload class D - 282 N/micron

Mass bearing - 0.18 kg

Tags :  SKF , 55x80x13