SKF 7207 ACD/P4A Angular Contact Ball Bearing

Details

Technical specification

DIMENSIONS

d		35 mm
D		72 mm
B		17 mm
d1		46.8 mm
d2		46.8 mm
D1		60.2 mm
r1,2		min. 1.1 mm
r3,4		min. 0.3 mm
a		21.1 mm

ABUTMENT DIMENSIONS

da		min. 42 mm
db		min. 42 mm
Da		max. 65 mm
Db		max. 69.6 mm
ra		max. 1 mm
rb		max. 0.3 mm
dn		49.7 mm

CALCULATION DATA

Basic dynamic load rating	C	30.7 kN
Basic static load rating	C0	20.8 kN
Fatigue load limit	Pu	0.88 kN
Attainable speed for grease lubrication		18000 r/min
Attainable speed for oil-air lubrication		30000 r/min
Contact angle	?	25 °
Ball diameter	Dw	11.112 mm
Number of balls	z	13
Reference grease quantity	Gref	3.903 cm³

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

Preload class A	GA	190 N
Static axial stiffness, preload class A		119 N/µm
Preload class B	GB	380 N
Static axial stiffness, preload class B		154 N/µm
Preload class C	GC	760 N
Static axial stiffness, preload class C		204 N/µm
Preload class D	GD	1520 N
Static axial stiffness, preload class D		275 N/µm

CALCULATION FACTORS

Calculation factor	f	1.05
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		0.28 kg