Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF S71903 CD/P4A

S71903 CD/P4A

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		50000	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		16	N/µm
Preload class B	G_B	30	N
Static axial stiffness, preload class B		22	N/µm
Preload class C	G_C	60	N
Static axial stiffness, preload class C		30	N/µm
Preload class D	G_D	120	N
Static axial stiffness, preload class D		43	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

0.017

Model Number: S71903 CD/P4A
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:shaft milling machine,embroidery cloth,garbage disposal,chamfer,Optical Instruments,miscellaneous instruments,floor industry,Infrared Technology,spring industry,Cutting Machine,Wire grinder
Similar models:S71903 CD/P4A 71903 CE/HCP4A 71903 CE/P4AH S71903 ACD/P4A 71903 ACE/P4AH S71903 ACD/HCP4A 71903 ACE/P4A S71903 CD/HCP4A 71903 CD/P4A 71903 CE/HCP4AH
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316691	550	740	-	Bearings, units and housings
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99250	63.5	71.628	23.8252	Seals
FYTBK 20 TD	20	-	-	Bearings, units and housings
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NK 45/30 TN	45	55	30	Bearings, units and housings
OKTC 505	-	735	-
S71914 CE/P4A	70	100	16	Bearings, units and housings

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