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Bearing 71908 ACB/HCP4A (SKF)

Angular contact ball bearings, super-precision 71908 ACB/HCP4A

Bearing number : 71908 ACB/HCP4A

Size (mm) : 40x62x12

Brand : SKF

Bore Diameter (mm) : 40

Outer Diameter (mm) : 62

Width (mm) : 12

Bearing dimensions and specification in SKF catalogue:

d - 40 mm

D - 62 mm

B - 12 mm

d₁ - 48.46 mm

d₂ - 47.6 mm

D₂ - 55.64 mm

r_1,2 - min. - 0.6 mm

r_3,4 - min. - 0.3 mm

a - 20.2 mm

d_a - min. - 43.2 mm

d_b - min. - 43.2 mm

D_a - max. - 58.8 mm

D_b - max. - 60 mm

r_a - max. - 0.6 mm

r_b - max. - 0.3 mm

d_n - 49.1 mm

Basic dynamic load rating - C - 5.1 kN

Basic static load rating - C₀ - 4 kN

Fatigue load limit - P_u - 0.166 kN

Limiting speed for grease lubrication - 32000 r/min

Limiting speed for oil lubrication - 50000 mm/min

Ball - D_w - 3.969 mm

Ball - z - 28

G_ref - 1.38 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 - 31 N

Preload class B - G_B - 62 N

Preload class C - G_C - 185 N

Calculation factor - f - 1.06

Calculation factor - f₁ - 0.99

Calculation factor - f_2A - 1

Calculation factor - f_2B - 1.02

Calculation factor - f_2C - 1.08

Calculation factor - f_HC - 1.01

Preload class A - 73 N/micron

Preload class B - 92 N/micron

Preload class C - 138 N/micron

Mass bearing - 0.114 kg

Tags :  SKF , 40x62x12