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Four Point Contact Ball Bearings (metric)

QJ1228MPA

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Details

Main dimensions
d [mm]	140
D [mm]	250
B [mm]	50
d₁ [mm]	≈ 180.7
D₁ [mm]	≈ 209.3
r_1,2 [mm]	3
α₀ [°]	45
a [mm]	≈ 195
Weight [kg]	≈ 11.9

Mating dimensions
d_{a, min} [mm]	154
D_{a, max} [mm]	236
r_{a, max} [mm]	2.5

Calculation data
C [kN]	311
C₀ [kN]	406
C_u [kN]	14.3
n_th [min^-1]	2877
n_g [min^-1]	4400