SKF 71912 ACE/HCP4AH1 Angular Contact Ball Bearing

Details

Technical specification

DIMENSIONS

d		60 mm
D		85 mm
B		13 mm
d1		67.75 mm
d2		65.7 mm
D1		77.3 mm
K		0.5 mm
C1		3.83 mm
r1,2		min. 1 mm
r3,4		min. 0.3 mm
a		24.6 mm

ABUTMENT DIMENSIONS

da		min. 64.6 mm
db		min. 62 mm
Da		max. 80.4 mm
Db		max. 83 mm
ra		max. 1 mm
rb		max. 0.3 mm
dn		69.6 mm

CALCULATION DATA

Basic dynamic load rating	C	15.3 kN
Basic static load rating	C0	11.2 kN
Fatigue load limit	Pu	0.475 kN
Attainable speed for grease lubrication		23000 r/min
Attainable speed for oil-air lubrication		36000 r/min
Contact angle	?	25 °
Ball diameter	Dw	7.938 mm
Number of balls	z	23
Reference grease quantity	Gref	2.5 cm³

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

Preload class A	GA	139 N
Static axial stiffness, preload class A		128 N/µm
Preload class B	GB	418 N
Static axial stiffness, preload class B		193 N/µm
Preload class C	GC	836 N
Static axial stiffness, preload class C		254 N/µm

CALCULATION FACTORS

Calculation factor	f	1.13
Calculation factor	f1	0.98
Calculation factor	f2A	1
Calculation factor	f2B	1.04
Calculation factor	f2C	1.08
Calculation factor	fHC	1.01
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		0.16 kg