SKF S7209 ACD/P4A Angular Contact Ball Bearing

Details

Technical specification

DIMENSIONS

d		45 mm
D		85 mm
B		19 mm
d1		57.3 mm
d2		57.3 mm
D2		75.7 mm
r1,2		min. 1.1 mm
r3,4		min. 0.6 mm
a		24.8 mm

ABUTMENT DIMENSIONS

da		min. 52 mm
da		max. 56.5 mm
db		min. 52 mm
db		max. 56.5 mm
Da		max. 78 mm
Db		max. 80.8 mm
ra		max. 1 mm
rb		max. 0.6 mm

CALCULATION DATA

Basic dynamic load rating	C	41 kN
Basic static load rating	C0	30 kN
Fatigue load limit	Pu	1.25 kN
Attainable speed for grease lubrication		15000 r/min
Contact angle	?	25 °
Ball diameter	Dw	12.7 mm
Number of balls	z	14

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

Preload class A	GA	260 N
Static axial stiffness, preload class A		146 N/µm
Preload class B	GB	520 N
Static axial stiffness, preload class B		190 N/µm
Preload class C	GC	1040 N
Static axial stiffness, preload class C		252 N/µm
Preload class D	GD	2080 N
Static axial stiffness, preload class D		341 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		0.42 kg