SKF 7044 ACD/HCP4A Angular contact ball bearings, super-precision

SKF 7044 ACD/HCP4A Angular contact ball bearings, super-precision
Angular contact ball bearings, super-precision

Tolerances: P4A, P4, PA9A, P2, Chamfer dimensionsRecommended shaft and housing fits: shafts, housingsValues for ISO tolerance classes: shafts, housingsSpeed dependent initial grease fill →Initial grease fillClamping and fitting forces: D design, E design, B design

Designation suffixes H, H1, L and L1identify variants for direct oil-air lubrication(→Variants).

d		220	mm
D		340	mm
B		56	mm
d1		257	mm
d2		257	mm
D1		303	mm
r1,2	min.	3	mm
r3,4	min.	1.5	mm
a		93.6	mm

Abutment dimensions

da	min.	233	mm
db	min.	233	mm
Da	max.	327	mm
Db	max.	334	mm
ra	max.	2.5	mm
rb	max.	1.5	mm
dn		267.1	mm

Calculation data

Basic dynamic load rating	C		319	kN
Basic static load rating	C0		440	kN
Fatigue load limit	Pu		11	kN
Attainable speed for grease lubrication			4500	r/min
Attainable speed for oil-air lubrication			6700	r/min
Ball diameter	Dw		38.1	mm
Number of balls	z		21
Reference grease quantity	Gref		201	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	GA		2000	N
Static axial stiffness, preload class A			607	N/µm
Preload class B	GB		4000	N
Static axial stiffness, preload class B			789	N/µm
Preload class C	GC		8000	N
Static axial stiffness, preload class C			1037	N/µm
Preload class D	GD		16000	N
Static axial stiffness, preload class D			1392	N/µm
Calculation factors
Calculation factor	f		1.13
Calculation factor	f1		0.99
Calculation factor	f2A		1
Calculation factor	f2B		1.02
Calculation factor	f2C		1.05
Calculation factor	f2D		1.08
Calculation factor	fHC		1.02
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

13.2

kg

<input type="hidden" name="moreInfoUrl" value="">