SKF 71911 CD/P4AL Angular Contact Ball Bearing

Details

Technical specification

DIMENSIONS

d		55 mm
D		80 mm
B		13 mm
d1		62.7 mm
d2		62.7 mm
D1		72.3 mm
b		2.2 mm
C1		6.5 mm
C2		3.2 mm
C3		2 mm
r1,2		min. 1 mm
r3,4		min. 0.3 mm
a		15.6 mm

ABUTMENT DIMENSIONS

da		min. 59.6 mm
db		min. 59.6 mm
Da		max. 75.4 mm
Db		max. 78 mm
ra		max. 1 mm
rb		max. 0.3 mm
dn		64.7 mm

CALCULATION DATA

Basic dynamic load rating	C	19.5 kN
Basic static load rating	C0	14.6 kN
Fatigue load limit	Pu	0.62 kN
Attainable speed for grease lubrication		16000 r/min
Attainable speed for oil-air lubrication		26000 r/min
Contact angle	?	15 °
Ball diameter	Dw	7.938 mm
Number of balls	z	23
Reference grease quantity	Gref	2.49 cm³

PRELOAD AND STIFFNESS (BACK-TO-BACK, FACE-TO-FACE)

Preload class A	GA	70 N
Static axial stiffness, preload class A		49 N/µm
Preload class B	GB	140 N
Static axial stiffness, preload class B		65 N/µm
Preload class C	GC	280 N
Static axial stiffness, preload class C		89 N/µm
Preload class D	GD	560 N
Static axial stiffness, preload class D		126 N/µm

CALCULATION FACTORS

Calculation factor	f	1.15
Calculation factor	f1	1
Calculation factor	f2A	1
Calculation factor	f2B	1.04
Calculation factor	f2C	1.09
Calculation factor	f2D	1.15
Calculation factor	fHC	1
Calculation factor	f0	10.4

MASS

Mass bearing		0.18 kg