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Bearing 728 CD/HCP4A (SKF)

Angular contact ball bearings, super-precision 728 CD/HCP4A

Bearing number : 728 CD/HCP4A

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 - 6.2 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 - 3.7 kN

Basic static load rating - C₀ - 1.4 kN

Fatigue load limit - P_u - 0.057 kN

Limiting speed for grease lubrication - 85000 r/min

Limiting speed for oil lubrication - 130000 mm/min

Ball - D_w - 4.762 mm

Ball - z - 8

G_ref - 0.228 cm3

Calculation factor - f₀ - 7.9

Preload class A - G_A - 14 N

Preload class B - G_B - 28 N

Preload class C - G_C - 56 N

Preload class D - G_D - 112 N

Calculation factor - f - 1.02

Calculation factor - f₁ - 1

Calculation factor - f_2A - 1

Calculation factor - f_2B - 1.01

Calculation factor - f_2C - 1.03

Calculation factor - f_2D - 1.06

Calculation factor - f_HC - 1.01

Preload class A - 13 N/micron

Preload class B - 17 N/micron

Preload class C - 23 N/micron

Preload class D - 33 N/micron

Mass bearing - 0.015 kg

Tags :  SKF , 8x24x8