Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF S71903 CD/HCP4A

S71903 CD/HCP4A

Dimensions

d		17	mm
D		30	mm
B		7	mm
d₁		20.9	mm
d₂		20.9	mm
D₂		27.8	mm
r_1,2	min.	0.3	mm
r_3,4	min.	0.2	mm
a		6.7	mm

Abutment dimensions

d_a	min.	19	mm
d_a	max.	20.5	mm
d_b	min.	19	mm
d_b	max.	20.5	mm
D_a	max.	28	mm
D_b	max.	28.6	mm
r_a	max.	0.3	mm
r_b	max.	0.2	mm

Calculation data

Basic dynamic load rating	C	4.16	kN
Basic static load rating	C₀	2.08	kN
Fatigue load limit	P_u	0.088	kN
Attainable speed for grease lubrication		63000	r/min
Ball diameter	D_w	3.969	mm
Number of balls	z	14
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	15	N
Static axial stiffness, preload class A		18	N/µm
Preload class B	G_B	30	N
Static axial stiffness, preload class B		24	N/µm
Preload class C	G_C	60	N
Static axial stiffness, preload class C		34	N/µm
Preload class D	G_D	120	N
Static axial stiffness, preload class D		47	N/µm
Calculation factors
Calculation factor	f	1.05
Calculation factor	f₁	1
Calculation factor	f_2A	1
Calculation factor	f_2B	1.07
Calculation factor	f_2C	1.12
Calculation factor	f_2D	1.18
Calculation factor	f_HC	1.04
Calculation factor	f₀	9.8

Mass

Mass bearing

0.015

Model Number: S71903 CD/HCP4A
Inner Diameter：17mm Outer Diameter：30mm Width：7mm
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:Medical room equipment,Cylinder Pneumatic Treatment Element,Energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving,powder metallurgy,industrial fans,transportation equipment,cleaning agent,trolley,Industrial equipment,vacuum suction cup,marine analysis and testing equipment
Similar models:71903 CE/HCP4AH 71903 CE/P4A S71903 CD/HCP4A 71903 CE/HCP4A S71903 CD/P4A S71903 ACD/P4A 71903 ACE/HCP4AH S71903 ACD/HCP4A 71903 ACD/HCP4A 71903 ACE/P4AH
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