Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF S71904 CD/P4A

S71904 CD/P4A

Dimensions

d		20	mm
D		37	mm
B		9	mm
d₁		25.6	mm
d₂		25.6	mm
D₂		34.15	mm
r_1,2	min.	0.3	mm
r_3,4	min.	0.2	mm
a		8.4	mm

Abutment dimensions

d_a	min.	22	mm
d_a	max.	25.1	mm
d_b	min.	22	mm
d_b	max.	25.1	mm
D_a	max.	35	mm
D_b	max.	35.6	mm
r_a	max.	0.3	mm
r_b	max.	0.2	mm

Calculation data

Basic dynamic load rating	C	6.05	kN
Basic static load rating	C₀	3.2	kN
Fatigue load limit	P_u	0.137	kN
Attainable speed for grease lubrication		43000	r/min
Ball diameter	D_w	4.762	mm
Number of balls	z	15
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	25	N
Static axial stiffness, preload class A		22	N/µm
Preload class B	G_B	50	N
Static axial stiffness, preload class B		29	N/µm
Preload class C	G_C	100	N
Static axial stiffness, preload class C		40	N/µm
Preload class D	G_D	200	N
Static axial stiffness, preload class D		56	N/µm
Calculation factors
Calculation factor	f	1.05
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	9.8

Mass

Mass bearing

0.037

Model Number: S71904 CD/P4A
Inner Diameter：20mm Outer Diameter：37mm Width：9mm
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：2026-04-16
Application:mathematical instruments,electric pump,,laser devices,chemical instruments,PVC,ventilation equipment,flexible processing,spring industry,lathe,municipal machinery
Similar models:71904 ACE/HCP4A 71904 CE/HCP4AH S71904 CE/HCP4A S71904 ACE/HCP4A 71904 CE/P4A S71904 ACD/HCP4A 71904 CD/HCP4A S71904 CD/HCP4A 71904 ACE/P4AH 71904 CE/HCP4A
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