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Bearing 71920 ACB/P4AL (SKF)

Angular contact ball bearings, super-precision 71920 ACB/P4AL

Bearing number : 71920 ACB/P4AL

Size (mm) : 100x140x20

Brand : SKF

Bore Diameter (mm) : 100

Outer Diameter (mm) : 140

Width (mm) : 20

Bearing dimensions and specification in SKF catalogue:

d - 100 mm

D - 140 mm

B - 20 mm

d₁ - 114.92 mm

d₂ - 113.16 mm

D₂ - 128.7 mm

b - 2.2 mm

C₁ - 10.9 mm

C₂ - 4.5 mm

C₃ - 2.9 mm

r_1,2 - min. - 1.1 mm

r_3,4 - min. - 0.6 mm

a - 41.4 mm

d_a - min. - 106 mm

d_b - min. - 106 mm

D_a - max. - 134 mm

D_b - max. - 136.8 mm

r_a - max. - 1 mm

r_b - max. - 0.6 mm

d_n - 116.1 mm

Basic dynamic load rating - C - 20.8 kN

Basic static load rating - C₀ - 21.2 kN

Fatigue load limit - P_u - 0.815 kN

Limiting speed for grease lubrication - 11000 r/min

Limiting speed for oil lubrication - 17000 mm/min

Ball - D_w - 7.938 mm

Ball - z - 37

G_ref - 9.96 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 - 125 N

Preload class B - G_B - 250 N

Preload class C - G_C - 750 N

Calculation factor - f - 1.11

Calculation factor - f₁ - 0.99

Calculation factor - f_2A - 1

Calculation factor - f_2B - 1.02

Calculation factor - f_2C - 1.07

Calculation factor - f_HC - 1

Preload class A - 157 N/micron

Preload class B - 202 N/micron

Preload class C - 306 N/micron

Mass bearing - 0.848 kg

Tags :  SKF , 100x140x20