SKF 71828 CD/HCP4 Angular contact ball bearings, super-precision

SKF 71828 CD/HCP4 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		140	mm
D		175	mm
B		18	mm
d1		151.3	mm
d2		151.3	mm
D1		163.71	mm
r1,2	min.	1.1	mm
r3,4	min.	0.6	mm
a		30.2	mm

Abutment dimensions

da	min.	146	mm
db	min.	146	mm
Da	max.	169	mm
Db	max.	171.8	mm
ra	max.	1	mm
rb	max.	0.6	mm
dn		153.2	mm

Calculation data

Basic dynamic load rating	C		44.9	kN
Basic static load rating	C0		62	kN
Fatigue load limit	Pu		2.12	kN
Attainable speed for grease lubrication			8000	r/min
Attainable speed for oil-air lubrication			12000	r/min
Ball diameter	Dw		10.319	mm
Number of balls	z		35
Reference grease quantity	Gref		9.9	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	GA		240	N
Static axial stiffness, preload class A			145	N/µm
Preload class B	GB		720	N
Static axial stiffness, preload class B			251	N/µm
Preload class C	GC		1440	N
Static axial stiffness, preload class C			373	N/µm
Calculation factors
Calculation factor	f		1.43
Calculation factor	f1		1
Calculation factor	f2A		1
Calculation factor	f2B		1.1
Calculation factor	f2C		1.18
Calculation factor	fHC		1.02
Calculation factor	f0		17.3

Mass

Mass bearing

0.71

kg

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