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axial load in double-direction Thrust Ball Bearings For Machine Tool Spindles

Designations	Principal dimensions(mm)	Basic load ratings(kN)	Other dimensions (mm)	Speed ratings (rpm)	Weight (kg)
d	D	H	r12	dyc(Cr)	stc(Cor)	d1	D1	Grease	Oil
51338M	190	320	105	4	467	1662	315	195	700	800	33.5
51140M	200	250	37	1.1	141	636	247	203	950	1400	3.6
51240M	200	280	62	2	271	1029	277	204	750	1000	11.5
51240	200	280	62	2	271	1029	277	204	750	1000	10.9

Fetures:

    Bearings of this type consist of the washers with raceway and the assembly of ball and cage. The washer that contacts the shaft is called shaft washer, and the one attached to the housing is called housing washer. Thrust bearings in double directions have a central washer connected to the shaft. Single-direction bearings can carry axial load in one direction, and double-direction bearings can carry axial load in two directions. The bearings with housing washer which has spherical mounting surface is self-alignable, which can reduce the effects of mounting error. Applications of these bearings can be found in steering mechanism of automobiles and machine tool spindles.