SKF 7213 ACD/P4A Angular Contact Ball Bearing

Details

Technical specification

DIMENSIONS

d		65 mm
D		120 mm
B		23 mm
d1		82.9 mm
d2		82.9 mm
D1		102.1 mm
r1,2		min. 1.5 mm
r3,4		min. 0.6 mm
a		33.2 mm

ABUTMENT DIMENSIONS

da		min. 74 mm
db		min. 74 mm
Da		max. 111 mm
Db		max. 115.8 mm
ra		max. 1.5 mm
rb		max. 0.6 mm
dn		86.6 mm

CALCULATION DATA

Basic dynamic load rating	C	63.7 kN
Basic static load rating	C0	51 kN
Fatigue load limit	Pu	2.2 kN
Attainable speed for grease lubrication		10000 r/min
Attainable speed for oil-air lubrication		17000 r/min
Contact angle	?	25 °
Ball diameter	Dw	15.875 mm
Number of balls	z	15
Reference grease quantity	Gref	12.471 cm³

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

Preload class A	GA	400 N
Static axial stiffness, preload class A		189 N/µm
Preload class B	GB	800 N
Static axial stiffness, preload class B		245 N/µm
Preload class C	GC	1600 N
Static axial stiffness, preload class C		324 N/µm
Preload class D	GD	3200 N
Static axial stiffness, preload class D		437 N/µm

CALCULATION FACTORS

Calculation factor	f	1.07
Calculation factor	f1	0.99
Calculation factor	f2A	1
Calculation factor	f2B	1.01
Calculation factor	f2C	1.02
Calculation factor	f2D	1.05
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		1.03 kg