SKF S7018 ACE/P4A Angular contact ball bearings, super-precision

SKF S7018 ACE/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		90	mm
D		140	mm
B		24	mm
d1		108.33	mm
d2		105.5	mm
D2		125.2	mm
r1,2	min.	1.5	mm
r3,4	min.	1	mm
a		39	mm

Abutment dimensions

da	min.	97	mm
da	max.	107.6	mm
db	min.	97	mm
db	max.	104.8	mm
Da	max.	133	mm
Db	max.	134.4	mm
ra	max.	1.5	mm
rb	max.	1	mm

Calculation data

Basic dynamic load rating	C		33.8	kN
Basic static load rating	C0		30	kN
Fatigue load limit	Pu		1.2	kN
Attainable speed for grease lubrication			12000	r/min
Ball diameter	Dw		11.112	mm
Number of balls	z		28
Preload and stiffness (back-to-back, face-to-face)
Preload class A	GA		300	N
Static axial stiffness, preload class A			196	N/µm
Preload class B	GB		920	N
Static axial stiffness, preload class B			297	N/µm
Preload class C	GC		1840	N
Static axial stiffness, preload class C			389	N/µm
Calculation factors
Calculation factor	f		1.1
Calculation factor	f1		0.99
Calculation factor	f2A		1
Calculation factor	f2B		1.03
Calculation factor	f2C		1.06
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

1.25

kg

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