Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71918 CD/P4AL

71918 CD/P4AL

Dimensions

d		90	mm
D		125	mm
B		18	mm
d₁		100.8	mm
d₂		100.8	mm
D₁		114.2	mm
b		2.6	mm
C₁		9.3	mm
C₂		4.2	mm
C₃		3	mm
r_1,2	min.	1.1	mm
r_3,4	min.	0.6	mm
a		23.5	mm

Abutment dimensions

d_a	min.	96	mm
d_b	min.	96	mm
D_a	max.	119	mm
D_b	max.	121	mm
r_a	max.	1	mm
r_b	max.	0.6	mm
d_n		103.3	mm

Calculation data

Basic dynamic load rating	C	47.5	kN
Basic static load rating	C₀	51	kN
Fatigue load limit	P_u	2.08	kN
Attainable speed for grease lubrication		9500	r/min
Attainable speed for oil-air lubrication		16000	r/min
Ball diameter	D_w	11.112	mm
Number of balls	z	26
Reference grease quantity	G_ref	7.5	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	180	N
Static axial stiffness, preload class A		94	N/µm
Preload class B	G_B	360	N
Static axial stiffness, preload class B		129	N/µm
Preload class C	G_C	720	N
Static axial stiffness, preload class C		183	N/µm
Preload class D	G_D	1440	N
Static axial stiffness, preload class D		268	N/µm
Calculation factors
Calculation factor	f	1.23
Calculation factor	f₁	1
Calculation factor	f_2A	1
Calculation factor	f_2B	1.04
Calculation factor	f_2C	1.09
Calculation factor	f_2D	1.15
Calculation factor	f_HC	1
Calculation factor	f₀	16.3

Mass

Mass bearing

0.55

Model Number: 71918 CD/P4AL
Inner Diameter：90mm Outer Diameter：125mm Width：18mm
Reference speed:- Limiting speed:-
Type：Bearings, units and housings Super-precision bearings Angular contact ball bearings Angular contact ball bearings, super-precision
Details： Angular contact ball bearings, super-precision
Update date：2026-04-20
Application:food safety,Medium and large motor,hydraulic pump,other accessories,bathroom facilities,transportation equipment,Broadcasting System,injection molding machine,gear grinding machine,Spectrum Products,Rolling mill
Similar models:71918 CD/P4AL 71918 ACD/P4AH1 71918 CD/P4A 71918 ACE/HCP4AH1 71918 CE/P4AH1 71918 ACD/P4AL S71918 CE/P4A S71918 ACE/HCP4A 71918 CB/P4A 71918 CE/HCP4AH1
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