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Bearing 71912 ACD/P4A (SKF)

Angular contact ball bearings, super-precision 71912 ACD/P4A

Bearing number : 71912 ACD/P4A

Size (mm) : 60x85x13

Brand : SKF

Bore Diameter (mm) : 60

Outer Diameter (mm) : 85

Width (mm) : 13

Bearing dimensions and specification in SKF catalogue:

d - 60 mm

D - 85 mm

B - 13 mm

d₁ - 67.7 mm

d₂ - 67.7 mm

D₁ - 77.3 mm

r_1,2 - min. - 1 mm

r_3,4 - min. - 0.3 mm

a - 23.5 mm

d_a - min. - 64.6 mm

d_b - min. - 64.6 mm

D_a - max. - 80.4 mm

D_b - max. - 83 mm

r_a - max. - 1 mm

r_b - max. - 0.3 mm

d_n - 69.7 mm

Basic dynamic load rating - C - 18.6 kN

Basic static load rating - C₀ - 14.6 kN

Fatigue load limit - P_u - 0.62 kN

Limiting speed for grease lubrication - 14000 r/min

Limiting speed for oil lubrication - 22000 mm/min

Ball - D_w - 7.938 mm

Ball - z - 24

G_ref - 2.7 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 - 1.17

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 - 128 N/micron

Preload class B - 166 N/micron

Preload class C - 218 N/micron

Preload class D - 292 N/micron

Mass bearing - 0.19 kg

Tags :  SKF , 60x85x13