SKF BTM 120 ATN9/HCP4CDB Angular contact thrust ball bearings, double direction, super-precision

SKF BTM 120 ATN9/HCP4CDB Angular contact thrust ball bearings, double direction, super-precision
Angular contact thrust ball bearings, double direction, super-precision

Tolerances: P4C, SP, UP, Chamfer dimensionsRecommended shaft and housing fits: shafts, housingsValues for ISO tolerance classes: shafts, housingsSpeed dependent initial grease fill → Initial grease fill

d		120	mm
D		180	mm
H		54	mm
d1		147.7	mm
D1		165	mm
r1,2	min.	2	mm
r3,4	min.	1	mm

Abutment dimensions

da	min.	129	mm
Da	max.	175	mm
ra	max.	2	mm
rb	max.	1	mm
dn		144.1	mm

Calculation data

Basic dynamic load rating	C		58.5	kN
Basic static load rating	C0		146	kN
Fatigue load limit	Pu		5	kN
Attainable speed for grease lubrication			6500	r/min
Attainable speed for oil-air lubrication			7700	r/min
Preload class A			600	N
Preload class B			1800	N
Static axial stiffnes for preload A			419	N/µm
Static axial stiffnes for preload B			634	N/µm
Reference grease quantity	Gref		40	cm³

Notes

Speed values are applicable to bearings with light preload (suffix DBA). For bearings with a heavy preload (suffix DBB), attainable speeds are about 75% of the quoted values.

Mass

Mass bearing

4.2

kg

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