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Bearing 728 ACD/P4A (SKF)

Angular contact ball bearings, super-precision 728 ACD/P4A

Bearing number : 728 ACD/P4A

Size (mm) : 8x24x8

Brand : SKF

Bore Diameter (mm) : 8

Outer Diameter (mm) : 24

Width (mm) : 8

Bearing dimensions and specification in SKF catalogue:

d - 8 mm

D - 24 mm

B - 8 mm

d₁ - 13.1 mm

d₂ - 13.1 mm

D₁ - 18.9 mm

r_1,2 - min. - 0.3 mm

r_3,4 - min. - 0.2 mm

a - 7.8 mm

d_a - min. - 10.4 mm

d_b - min. - 10.4 mm

D_a - max. - 21.6 mm

D_b - max. - 22.2 mm

r_a - max. - 0.3 mm

r_b - max. - 0.2 mm

d_n - 14.3 mm

Basic dynamic load rating - C - 3.6 kN

Basic static load rating - C₀ - 1.3 kN

Fatigue load limit - P_u - 0.057 kN

Limiting speed for grease lubrication - 67000 r/min

Limiting speed for oil lubrication - 100000 mm/min

Ball - D_w - 4.762 mm

Ball - z - 8

G_ref - 0.228 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 - 22 N

Preload class B - G_B - 44 N

Preload class C - G_C - 88 N

Preload class D - G_D - 176 N

Calculation factor - f - 1.02

Calculation factor - f₁ - 0.99

Calculation factor - f_2A - 1

Calculation factor - f_2B - 1.01

Calculation factor - f_2C - 1.02

Calculation factor - f_2D - 1.05

Calculation factor - f_HC - 1

Preload class A - 28 N/micron

Preload class B - 36 N/micron

Preload class C - 48 N/micron

Preload class D - 63 N/micron

Mass bearing - 0.017 kg

Tags :  SKF , 8x24x8