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Four Point Contact Ball Bearings (metric)

Q388MPB

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Details

Main dimensions
d [mm]	440
D [mm]	900
B [mm]	145
d₁ [mm]	≈ 614.3
D₁ [mm]	≈ 725.7
r_1,2 [mm]	9.5
α₀ [°]	23
a [mm]	≈ 284
Weight [kg]	≈ 510

Mating dimensions
d_{a, min} [mm]	480
D_{a, max} [mm]	860
r_{a, max} [mm]	8

Calculation data
C [kN]	2040
C₀ [kN]	5450
C_u [kN]	105
n_th [min^-1]	425
n_g [min^-1]	1100