Bearings Online Catalogue

Home > Bearings Catalogue Online > Angular Contact Ball Bearings

Bearing 7208 ACD/HCP4A (SKF)

Angular contact ball bearings, super-precision 7208 ACD/HCP4A

Bearing number : 7208 ACD/HCP4A

Size (mm) : 40x80x18

Brand : SKF

Bore Diameter (mm) : 40

Outer Diameter (mm) : 80

Width (mm) : 18

Bearing dimensions and specification in SKF catalogue:

d - 40 mm

D - 80 mm

B - 18 mm

d₁ - 53.3 mm

d₂ - 53.3 mm

D₁ - 66.7 mm

r_1,2 - min. - 1.1 mm

r_3,4 - min. - 0.6 mm

a - 23.1 mm

d_a - min. - 47 mm

d_b - min. - 47 mm

D_a - max. - 73 mm

D_b - max. - 75.8 mm

r_a - max. - 1 mm

r_b - max. - 0.6 mm

d_n - 56.2 mm

Basic dynamic load rating - C - 31.9 kN

Basic static load rating - C₀ - 22.8 kN

Fatigue load limit - P_u - 0.98 kN

Limiting speed for grease lubrication - 19000 r/min

Limiting speed for oil lubrication - 32000 mm/min

Ball - D_w - 11.112 mm

Ball - z - 14

G_ref - 4.725 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 - 200 N

Preload class B - G_B - 400 N

Preload class C - G_C - 800 N

Preload class D - G_D - 1600 N

Calculation factor - f - 1.05

Calculation factor - f₁ - 0.99

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 - 141 N/micron

Preload class B - 183 N/micron

Preload class C - 242 N/micron

Preload class D - 326 N/micron

Mass bearing - 0.326 kg

Tags :  SKF , 40x80x18