SKF BSA 208 C Angular contact thrust ball bearings for screw drives, single direction, super-precision

SKF BSA 208 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		80	mm
H		18	mm
d1		50.3	mm
d2		58	mm
D1		58.1	mm
D2		66.45	mm
r1,2	min.	1.1	mm
a		64	mm

Abutment dimensions

da	min.	48	mm
db	min.	48	mm
Da	max.	74	mm
Db	max.	74	mm
ra	max.	1	mm

Calculation data

Basic dynamic load rating	C		42.5	kN
Basic static load rating	C0		112	kN
Fatigue load limit	Pu		4.15	kN
Attainable speed for grease lubrication			6300	r/min
Attainable speed for oil-air lubrication			7500	r/min
Preload class A			3400	N
Preload class B			6800	N
Frictional moment, preload class A			0.212	N·m
Frictional moment, preload class B			0.46	N·m
Static axial stiffnes, preload A			1130	N/µm
Static axial stiffnes, preload B			1440	N/µm
Maximum axial load carrying capacity	Fa	max.	37.9	kN
Reference grease quantity	Gref		3.7	cm³

Mass

Mass bearing

0.43

kg

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