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Bearing 71904 ACE/HCP4AL (SKF)

Angular contact ball bearings, super-precision 71904 ACE/HCP4AL

Bearing number : 71904 ACE/HCP4AL

Size (mm) : 20x37x9

Brand : SKF

Bore Diameter (mm) : 20

Outer Diameter (mm) : 37

Width (mm) : 9

Bearing dimensions and specification in SKF catalogue:

d - 20 mm

D - 37 mm

B - 9 mm

d₁ - 25.65 mm

d₂ - 24.4 mm

D₁ - 31.49 mm

b - 1.5 mm

C₁ - 4.6 mm

C₂ - 1.4 mm

C₃ - 0.9 mm

r_1,2 - min. - 0.3 mm

r_3,4 - min. - 0.15 mm

a - 11.6 mm

d_a - min. - 22 mm

d_b - min. - 22 mm

D_a - max. - 35 mm

D_b - max. - 36.2 mm

r_a - max. - 0.3 mm

r_b - max. - 0.15 mm

d_n - 26.7 mm

Basic dynamic load rating - C - 4.7 kN

Basic static load rating - C₀ - 2.3 kN

Fatigue load limit - P_u - 0.098 kN

Limiting speed for grease lubrication - 60000 r/min

Limiting speed for oil lubrication - 95000 mm/min

Ball - D_w - 4.762 mm

Ball - z - 14

G_ref - 0.5 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 - 42 N

Preload class B - G_B - 130 N

Preload class C - G_C - 250 N

Calculation factor - f - 1.04

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_HC - 1.01

Preload class A - 52 N/micron

Preload class B - 76 N/micron

Preload class C - 98 N/micron

Mass bearing - 0.032 kg

Tags :  SKF , 20x37x9