Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF S71928 ACD/HCP4A

S71928 ACD/HCP4A

Dimensions

d		140	mm
D		190	mm
B		24	mm
d₁		155.4	mm
d₂		155.4	mm
D₂		178.25	mm
r_1,2	min.	1.5	mm
r_3,4	min.	0.6	mm
a		50.6	mm

Abutment dimensions

d_a	min.	147	mm
d_a	max.	154.8	mm
d_b	min.	147	mm
d_b	max.	154.8	mm
D_a	max.	183	mm
D_b	max.	186	mm
r_a	max.	1.5	mm
r_b	max.	0.6	mm

Calculation data

Basic dynamic load rating	C	90.4	kN
Basic static load rating	C₀	110	kN
Fatigue load limit	P_u	3.65	kN
Attainable speed for grease lubrication		7000	r/min
Ball diameter	D_w	15.875	mm
Number of balls	z	29
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	560	N
Static axial stiffness, preload class A		386	N/µm
Preload class B	G_B	1120	N
Static axial stiffness, preload class B		507	N/µm
Preload class C	G_C	2240	N
Static axial stiffness, preload class C		681	N/µm
Preload class D	G_D	4480	N
Static axial stiffness, preload class D		933	N/µm
Calculation factors
Calculation factor	f	1.29
Calculation factor	f₁	0.98
Calculation factor	f_2A	1
Calculation factor	f_2B	1.07
Calculation factor	f_2C	1.12
Calculation factor	f_2D	1.17
Calculation factor	f_HC	1.04
Calculation factor	e	0.68
Calculation factor (single, tandem)	Y₂	0.87
Calculation factor (single, tandem)	Y₀	0.38
Calculation factor (single, tandem)	X₂	0.41
Calculation factor (back-to-back, face-to-face)	Y₁	0.92
Calculation factor (back-to-back, face-to-face)	Y₂	1.41
Calculation factor (back-to-back, face-to-face)	Y₀	0.76
Calculation factor (back-to-back, face-to-face)	X₂	0.67

Mass

Mass bearing

1.4

Model Number: S71928 ACD/HCP4A
Inner Diameter：140mm Outer Diameter：190mm Width：24mm
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：2026-06-25
Application:Display Devices,hardware,laser devices,supporting facilities,Insect Count,insect experimental analysis instrument,hydraulic connector,lathe,oral medical device,security equipment,drawing die
Similar models:71928 ACD/P4AL 71928 CD/P4AH1 S71928 ACD/P4A 71928 ACD/P4AH1 S71928 CD/HCP4A 71928 CD/HCP4AL 71928 ACD/P4A S71928 CD/P4A 71928 ACD/HCP4A 71928 ACD/HCP4AH1
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Model No. Inner Diameter Outer Diameter Width Type

19643
52218
FYWK 1.1/4 AYTH
NKX 35 Z
PSMF 182430 A51

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Hot number： 1000110 14867 25x47x10 HMS5 RG 36x50x8 CRW1 R 404103 95x145x12 HMSA10 RG BSD 55100 C D/W R144 R-2Z FYR 1 7/16-18 FYTJ 30 KF IR 50X55X20 IS1 NA 69/32 SAF 1220 T SSAFS 22532 W 623

Model No.	Inner Diameter	Outer Diameter	Width	Type
19643
52218
FYWK 1.1/4 AYTH
NKX 35 Z
PSMF 182430 A51