SKF 71915 ACD/HCP4A Angular contact ball bearings, super-precision

SKF 71915 ACD/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		75	mm
D		105	mm
B		16	mm
d1		84.2	mm
d2		84.2	mm
D1		95.8	mm
r1,2	min.	1	mm
r3,4	min.	0.3	mm
a		29.1	mm

Abutment dimensions

da	min.	79.6	mm
db	min.	79.6	mm
Da	max.	100	mm
Db	max.	103	mm
ra	max.	1	mm
rb	max.	0.3	mm
dn		86.7	mm

Calculation data

Basic dynamic load rating	C		33.8	kN
Basic static load rating	C0		35.5	kN
Fatigue load limit	Pu		1.5	kN
Attainable speed for grease lubrication			13000	r/min
Attainable speed for oil-air lubrication			20000	r/min
Ball diameter	Dw		9.525	mm
Number of balls	z		26
Reference grease quantity	Gref		5.1	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	GA		210	N
Static axial stiffness, preload class A			216	N/µm
Preload class B	GB		420	N
Static axial stiffness, preload class B			283	N/µm
Preload class C	GC		840	N
Static axial stiffness, preload class C			377	N/µm
Preload class D	GD		1680	N
Static axial stiffness, preload class D			515	N/µm
Calculation factors
Calculation factor	f		1.21
Calculation factor	f1		0.98
Calculation factor	f2A		1
Calculation factor	f2B		1.07
Calculation factor	f2C		1.12
Calculation factor	f2D		1.17
Calculation factor	fHC		1.04
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

0.3

kg

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