SKF BSA 308 C Angular contact thrust ball bearings for screw drives, single direction, super-precision

SKF BSA 308 C Angular contact thrust ball bearings for screw drives, single direction, super-precision
Angular contact thrust ball bearings for screw drives, single direction, super-precision

Tolerances: table, Chamfer dimensionsBearing preloadDesign considerations: shafts, housingsSpeed dependent initial grease fill → Initial grease fill

d		40	mm
D		90	mm
H		23	mm
d1		57.55	mm
d2		66.5	mm
D1		66.6	mm
D2		77.27	mm
r1,2	min.	1.5	mm
a		74	mm

Abutment dimensions

da	min.	53	mm
db	min.	53	mm
Da	max.	81	mm
Db	max.	81	mm
ra	max.	1.5	mm

Calculation data

Basic dynamic load rating	C		67	kN
Basic static load rating	C0		180	kN
Fatigue load limit	Pu		6.7	kN
Attainable speed for grease lubrication			5300	r/min
Attainable speed for oil-air lubrication			7000	r/min
Preload class A			5100	N
Preload class B			10200	N
Frictional moment, preload class A			0.35	N·m
Frictional moment, preload class B			0.62	N·m
Static axial stiffnes, preload A			1340	N/µm
Static axial stiffnes, preload B			1710	N/µm
Maximum axial load carrying capacity	Fa	max.	78.2	kN
Reference grease quantity	Gref		6.4	cm³

Mass

Mass bearing

0.77

kg

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