Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71902 CD/HCP4A

71902 CD/HCP4A

Dimensions

d		15	mm
D		28	mm
B		7	mm
d₁		18.9	mm
d₂		18.9	mm
D₁		23.7	mm
r_1,2	min.	0.3	mm
r_3,4	min.	0.2	mm
a		6.4	mm

Abutment dimensions

d_a	min.	17	mm
d_b	min.	17	mm
D_a	max.	26	mm
D_b	max.	26.6	mm
r_a	max.	0.3	mm
r_b	max.	0.2	mm
d_n		20.1	mm

Calculation data

Basic dynamic load rating	C	3.97	kN
Basic static load rating	C₀	1.9	kN
Fatigue load limit	P_u	0.08	kN
Attainable speed for grease lubrication		70000	r/min
Attainable speed for oil-air lubrication		100000	r/min
Ball diameter	D_w	3.969	mm
Number of balls	z	13
Reference grease quantity	G_ref	0.21	cm³
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		23	N/µm
Preload class C	G_C	60	N
Static axial stiffness, preload class C		32	N/µm
Preload class D	G_D	120	N
Static axial stiffness, preload class D		45	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	9.6

Mass

Mass bearing

0.014

Model Number: 71902 CD/HCP4A
Inner Diameter：15mm Outer Diameter：28mm 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：2025-12-09
Application:Small air generators,respirator,non-ferrous metal alloy,vertical processing,raw material accessories,Pneumatic Actuator,lifting upgrade,quality inspection equipment,Energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving,chamfer,meat products machine
Similar models:S71902 CD/HCP4A 71902 CE/P4A 71902 CE/HCP4A 71902 ACD/P4A 71902 ACE/P4A S71902 CD/P4A S71902 ACD/P4A 71902 CD/P4A 71902 ACD/HCP4A 71902 ACE/HCP4AH
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Hot number： 14566 30217 313445 C 37330 406203 7012 CE/P4AH1 86600 99301 AOHX 3288 G BK 0912 D/W R168 R-2Z NA 6904 NJ 2205 ECP SAFS 22520 x 3.5/16 T SSAFS 23038 KAT x 7