SKF 7212 ACD/HCP4A Angular Contact Ball Bearing

Details

Technical specification

DIMENSIONS

d		60 mm
D		110 mm
B		22 mm
d1		76.4 mm
d2		76.4 mm
D1		93.6 mm
r1,2		min. 1.5 mm
r3,4		min. 0.6 mm
a		30.9 mm

ABUTMENT DIMENSIONS

da		min. 69 mm
db		min. 69 mm
Da		max. 101 mm
Db		max. 105.8 mm
ra		max. 1.5 mm
rb		max. 0.6 mm
dn		80.1 mm

CALCULATION DATA

Basic dynamic load rating	C	55.3 kN
Basic static load rating	C0	45 kN
Fatigue load limit	Pu	1.37 kN
Attainable speed for grease lubrication		14000 r/min
Attainable speed for oil-air lubrication		22000 r/min
Contact angle	?	25 °
Ball diameter	Dw	14.288 mm
Number of balls	z	16
Reference grease quantity	Gref	10.08 cm³

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

Preload class A	GA	350 N
Static axial stiffness, preload class A		202 N/µm
Preload class B	GB	700 N
Static axial stiffness, preload class B		264 N/µm
Preload class C	GC	1400 N
Static axial stiffness, preload class C		349 N/µm
Preload class D	GD	2800 N
Static axial stiffness, preload class D		470 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	1.03
Calculation factor	f2D	1.06
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		0.69 kg