SKF 71915 ACE/P4AL Angular contact ball bearings, super-precision

SKF 71915 ACE/P4AL 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		84.3	mm
d2		81.8	mm
D1		95.52	mm
b		2	mm
C1		8.6	mm
C2		2.8	mm
C3		2.8	mm
r1,2	min.	1	mm
r3,4	min.	0.3	mm
a		30.2	mm

Abutment dimensions

da	min.	79.6	mm
db	min.	77	mm
Da	max.	100.4	mm
Db	max.	103	mm
ra	max.	1	mm
rb	max.	0.3	mm
dn		86.5	mm

Calculation data

Basic dynamic load rating	C		21.2	kN
Basic static load rating	C0		16.3	kN
Fatigue load limit	Pu		0.68	kN
Attainable speed for grease lubrication			15500	r/min
Attainable speed for oil-air lubrication			24000	r/min
Ball diameter	Dw		9.525	mm
Number of balls	z		23
Reference grease quantity	Gref		4.5	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	GA		192	N
Static axial stiffness, preload class A			137	N/µm
Preload class B	GB		577	N
Static axial stiffness, preload class B			205	N/µm
Preload class C	GC		1150	N
Static axial stiffness, preload class C			269	N/µm
Calculation factors
Calculation factor	f		1.16
Calculation factor	f1		0.99
Calculation factor	f2A		1
Calculation factor	f2B		1.04
Calculation factor	f2C		1.07
Calculation factor	fHC		1
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

0.34

kg

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