SKF S71922 ACE/HCP4A Angular contact ball bearings, super-precision

SKF S71922 ACE/HCP4A 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		110	mm
D		150	mm
B		20	mm
d1		122.4	mm
d2		119	mm
D2		140.9	mm
r1,2	min.	1.1	mm
r3,4	min.	0.6	mm
a		42.7	mm

Abutment dimensions

da	min.	116	mm
da	max.	121.8	mm
db	min.	113.2	mm
db	max.	118.4	mm
Da	max.	144	mm
Db	max.	146.8	mm
ra	max.	1	mm
rb	max.	0.6	mm

Calculation data

Basic dynamic load rating	C		37.7	kN
Basic static load rating	C0		32.5	kN
Fatigue load limit	Pu		1.18	kN
Attainable speed for grease lubrication			12300	r/min
Ball diameter	Dw		12.7	mm
Number of balls	z		26
Preload and stiffness (back-to-back, face-to-face)
Preload class A	GA		340	N
Static axial stiffness, preload class A			221	N/µm
Preload class B	GB		1030	N
Static axial stiffness, preload class B			334	N/µm
Preload class C	GC		2070	N
Static axial stiffness, preload class C			441	N/µm
Calculation factors
Calculation factor	f		1.2
Calculation factor	f1		0.98
Calculation factor	f2A		1
Calculation factor	f2B		1.04
Calculation factor	f2C		1.08
Calculation factor	fHC		1.01
Calculation factor	e		0.68
Calculation factor (single, tandem)	Y2		0.87
Calculation factor (single, tandem)	Y0		0.38
Calculation factor (single, tandem)	X2		0.41
Calculation factor (back-to-back, face-to-face)	Y1		0.92
Calculation factor (back-to-back, face-to-face)	Y2		1.41
Calculation factor (back-to-back, face-to-face)	Y0		0.76
Calculation factor (back-to-back, face-to-face)	X2		0.67

Mass

Mass bearing

0.71

kg

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