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Bearing 71808 ACD/P4 (SKF)

Angular contact ball bearings, super-precision 71808 ACD/P4

Bearing number : 71808 ACD/P4

Size (mm) : 40x52x7

Brand : SKF

Bore Diameter (mm) : 40

Outer Diameter (mm) : 52

Width (mm) : 7

Bearing dimensions and specification in SKF catalogue:

d - 40 mm

D - 52 mm

B - 7 mm

d₁ - 44.1 mm

d₂ - 44.1 mm

D₁ - 48.1 mm

r_1,2 - min. - 0.3 mm

r_3,4 - min. - 0.15 mm

a - 14.3 mm

d_a - min. - 42 mm

d_b - min. - 42 mm

D_a - max. - 50 mm

D_b - max. - 51.2 mm

r_a - max. - 0.3 mm

r_b - max. - 0.15 mm

d_n - 44.5 mm

Basic dynamic load rating - C - 4.5 kN

Basic static load rating - C₀ - 4.6 kN

Fatigue load limit - P_u - 0.196 kN

Limiting speed for grease lubrication - 22000 r/min

Limiting speed for oil lubrication - 34000 mm/min

Ball - D_w - 3.175 mm

Ball - z - 29

G_ref - 0.31 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 - 40 N

Preload class B - G_B - 120 N

Preload class C - G_C - 240 N

Calculation factor - f - 1.23

Calculation factor - f₁ - 0.97

Calculation factor - f_2A - 1

Calculation factor - f_2B - 1.08

Calculation factor - f_2C - 1.15

Calculation factor - f_HC - 1

Preload class A - 83 N/micron

Preload class B - 130 N/micron

Preload class C - 178 N/micron

Mass bearing - 0.031 kg

Tags :  SKF , 40x52x7