Bearing QJ 1256 N2MA (SKF)

Angular contact ball bearings, four-point contact ball bearings QJ 1256 N2MA

Bearing number : QJ 1256 N2MA

Size (mm) : 280x500x90

Brand : SKF

Bore Diameter (mm) : 280

Outer Diameter (mm) : 500

Width (mm) : 90

Bearing dimensions and specification in SKF catalogue:

d - 280 mm

D - 500 mm

B - 90 mm

d₁ - - 365 mm

D₁ - - 415 mm

a - 390 mm

h - 12.5 mm

b - 15 mm

r₀ - 2.5 mm

r_1,2 - min. - 5 mm

d_a - min. - 302 mm

D_a - max. - 478 mm

r_a - max. - 4 mm

Basic dynamic load rating - C - 728 kN

Basic static load rating - C₀ - 1460 kN

Fatigue load limit - P_u - 31.5 kN

Reference speed - 1300 r/min

Limiting speed - 2000 r/min

Calculation factor - k_a - 0.9

Calculation factor - e - 1.34

Calculation factor - X - 0.54

Calculation factor - Y₀ - 0.44

Calculation factor - Y₁ - 0.47

Calculation factor - Y₂ - 0.81

Mass bearing - 82 kg

Designation

Bore Dia, mm

Outer Dia, mm: