SKF 7226 CD/P4A Angular contact ball bearings, super-precision

SKF 7226 CD/P4A Angular contact ball bearings, super-precision
Angular contact ball bearings, super-precision

Tolerances: P4A, P4, PA9A, P2, Chamfer dimensionsRecommended shaft and housing fits: shafts, housingsValues for ISO tolerance classes: shafts, housingsSpeed dependent initial grease fill →Initial grease fillClamping and fitting forces: D design, E design, B design

Designation suffixes H, H1, L and L1identify variants for direct oil-air lubrication(→Variants).

d		130	mm
D		230	mm
B		40	mm
d1		162.8	mm
d2		162.8	mm
D1		199.2	mm
r1,2	min.	3	mm
r3,4	min.	1.1	mm
a		44.4	mm

Abutment dimensions

da	min.	144	mm
db	min.	144	mm
Da	max.	216	mm
Db	max.	223	mm
ra	max.	2.5	mm
rb	max.	1	mm
dn		170.7	mm

Calculation data

Basic dynamic load rating	C		216	kN
Basic static load rating	C0		224	kN
Fatigue load limit	Pu		6.95	kN
Attainable speed for grease lubrication			6300	r/min
Attainable speed for oil-air lubrication			9500	r/min
Ball diameter	Dw		30.162	mm
Number of balls	z		17
Reference grease quantity	Gref		72.444	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	GA		810	N
Static axial stiffness, preload class A			155	N/µm
Preload class B	GB		1620	N
Static axial stiffness, preload class B			209	N/µm
Preload class C	GC		3240	N
Static axial stiffness, preload class C			291	N/µm
Preload class D	GD		6480	N
Static axial stiffness, preload class D			416	N/µm
Calculation factors
Calculation factor	f		1.09
Calculation factor	f1		1
Calculation factor	f2A		1
Calculation factor	f2B		1.01
Calculation factor	f2C		1.03
Calculation factor	f2D		1.05
Calculation factor	fHC		1
Calculation factor	f0		14.9

Mass

Mass bearing

6.33

kg

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