Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71928 ACD/HCP4AH1

71928 ACD/HCP4AH1

Dimensions

d		140	mm
D		190	mm
B		24	mm
d₁		155.4	mm
d₂		155.4	mm
D₁		174.6	mm
K		0.5	mm
C₁		6.92	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_b	min.	147	mm
D_a	max.	183	mm
D_b	max.	186	mm
r_a	max.	1.5	mm
r_b	max.	0.6	mm
d_n		159.5	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
Attainable speed for oil-air lubrication		11000	r/min
Ball diameter	D_w	15.875	mm
Number of balls	z	29
Reference grease quantity	G_ref	21.6	cm³
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

1.39

Model Number: 71928 ACD/HCP4AH1
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：2026-08-19
Application:Dental Drill etc,forklift truck,turret industry,medical equipment,wire industry,walking Food processing machinery and equipment,drawing die,Spectral Products,Equipment,van,Machine Tool Accessories
Similar models:71928 CD/HCP4A 71928 ACD/P4A 71928 CD/P4AL 71928 ACD/P4AH1 S71928 ACD/HCP4A 71928 ACD/HCP4AL 71928 CD/HCP4AH1 S71928 ACD/P4A 71928 CD/HCP4AL 71928 ACD/HCP4A
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Model No. Inner Diameter Outer Diameter Width Type

IR 17x21x20
NJG 2317 VH
PCM 323620 M
S7012 CB/P4A
SY 3/4 TF/VA201

Purchase the SKF 71928 ACD/HCP4AH1 Please fill in the following

Hot number： 35x62x7 HMSA10 RG 527903 550154 6210 M 71914 CD/HCP4A 85979 90896 99340 NJ 320 ECM NK 5/10 TN NUP 2210 ECJ NU 315 ECJ PWKR 52.2RS SAFS 23026 KA x 4.1/2 SY 1. TF

Model No.	Inner Diameter	Outer Diameter	Width	Type
IR 17x21x20
NJG 2317 VH
PCM 323620 M
S7012 CB/P4A
SY 3/4 TF/VA201