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Bearing 71948 ACD/P4A (SKF)

Angular contact ball bearings, super-precision 71948 ACD/P4A

Bearing number : 71948 ACD/P4A

Size (mm) : 240x320x38

Brand : SKF

Bore Diameter (mm) : 240

Outer Diameter (mm) : 320

Width (mm) : 38

Bearing dimensions and specification in SKF catalogue:

d - 240 mm

D - 320 mm

B - 38 mm

d₁ - 264.7 mm

d₂ - 264.7 mm

D₁ - 295.3 mm

r_1,2 - min. - 2.1 mm

r_3,4 - min. - 1 mm

a - 84.5 mm

d_a - min. - 251 mm

d_b - min. - 251 mm

D_a - max. - 309 mm

D_b - max. - 315 mm

r_a - max. - 2 mm

r_b - max. - 1 mm

d_n - 271.4 mm

Basic dynamic load rating - C - 216 kN

Basic static load rating - C₀ - 305 kN

Fatigue load limit - P_u - 7.8 kN

Limiting speed for grease lubrication - 3200 r/min

Limiting speed for oil lubrication - 4800 mm/min

Ball - D_w - 25.4 mm

Ball - z - 31

G_ref - 93 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 - 1350 N

Preload class B - G_B - 2700 N

Preload class C - G_C - 5400 N

Preload class D - G_D - 10800 N

Calculation factor - f - 1.32

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 - 584 N/micron

Preload class B - 767 N/micron

Preload class C - 1029 N/micron

Preload class D - 1412 N/micron

Mass bearing - 8.5 kg

Tags :  SKF , 240x320x38