SKF 7038 CD/P4A Angular contact ball bearings, super-precision

SKF 7038 CD/P4A 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		190	mm
D		290	mm
B		46	mm
d1		221.8	mm
d2		221.8	mm
D1		258.2	mm
r1,2	min.	2.1	mm
r3,4	min.	1.1	mm
a		55.3	mm

Abutment dimensions

da	min.	201	mm
db	min.	201	mm
Da	max.	279	mm
Db	max.	284	mm
ra	max.	2	mm
rb	max.	1	mm
dn		229.7	mm

Calculation data

Basic dynamic load rating	C		247	kN
Basic static load rating	C0		305	kN
Fatigue load limit	Pu		8.3	kN
Attainable speed for grease lubrication			4800	r/min
Attainable speed for oil-air lubrication			7000	r/min
Ball diameter	Dw		30.162	mm
Number of balls	z		22
Reference grease quantity	Gref		114	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	GA		950	N
Static axial stiffness, preload class A			196	N/µm
Preload class B	GB		1900	N
Static axial stiffness, preload class B			266	N/µm
Preload class C	GC		3800	N
Static axial stiffness, preload class C			370	N/µm
Preload class D	GD		7600	N
Static axial stiffness, preload class D			532	N/µm
Calculation factors
Calculation factor	f		1.14
Calculation factor	f1		1
Calculation factor	f2A		1
Calculation factor	f2B		1.02
Calculation factor	f2C		1.05
Calculation factor	f2D		1.09
Calculation factor	fHC		1
Calculation factor	f0		15.9

Mass

Mass bearing

9.51

kg

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