SKF 71930 CD/HCP4AH1 Angular contact ball bearings, super-precision

SKF 71930 CD/HCP4AH1 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		150	mm
D		210	mm
B		28	mm
d1		168.5	mm
d2		168.5	mm
D1		191.5	mm
K		0.6	mm
C1		7.32	mm
r1,2	min.	2	mm
r3,4	min.	1	mm
a		38.2	mm

Abutment dimensions

da	min.	159	mm
db	min.	159	mm
Da	max.	201	mm
Db	max.	205	mm
ra	max.	2	mm
rb	max.	1	mm
dn		173.5	mm

Calculation data

Basic dynamic load rating	C		114	kN
Basic static load rating	C0		132	kN
Fatigue load limit	Pu		4.15	kN
Attainable speed for grease lubrication			7500	r/min
Attainable speed for oil-air lubrication			11000	r/min
Ball diameter	Dw		19.05	mm
Number of balls	z		23
Reference grease quantity	Gref		35	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	GA		470	N
Static axial stiffness, preload class A			158	N/µm
Preload class B	GB		940	N
Static axial stiffness, preload class B			216	N/µm
Preload class C	GC		1880	N
Static axial stiffness, preload class C			306	N/µm
Preload class D	GD		3760	N
Static axial stiffness, preload class D			450	N/µm
Calculation factors
Calculation factor	f		1.24
Calculation factor	f1		1
Calculation factor	f2A		1
Calculation factor	f2B		1.07
Calculation factor	f2C		1.12
Calculation factor	f2D		1.18
Calculation factor	fHC		1.04
Calculation factor	f0		16.2

Mass

Mass bearing

2.08

kg

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