SKF BTW 55 CTN9/SP Angular contact thrust ball bearings, double direction, super-precision

SKF BTW 55 CTN9/SP 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		55	mm
D		90	mm
H		44	mm
d1		75.2	mm
2C		22	mm
r1,2	min.	1.1	mm
r3,4	min.	0.6	mm

Abutment dimensions

da	min.	68	mm
Da	min.	84	mm
Da	max.	85	mm
ra	max.	1	mm
rb	max.	0.6	mm

Calculation data

Basic dynamic load rating	C		30.2	kN
Basic static load rating	C0		80	kN
Fatigue load limit	Pu		3.8	kN
Attainable speed for grease lubrication			7500	r/min
Attainable speed for oil-air lubrication			9000	r/min
Preload			440	N
Static axial stiffness			580	N/µm
Reference grease quantity	Gref		4.8	cm³

Mass

Mass bearing

0.87

kg

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