Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71804 ACD/HCP4

71804 ACD/HCP4

Dimensions

d		20	mm
D		32	mm
B		7	mm
d₁		24.1	mm
d₂		24.1	mm
D₁		28.1	mm
r_1,2	min.	0.3	mm
r_3,4	min.	0.15	mm
a		9.6	mm

Abutment dimensions

d_a	min.	22	mm
d_b	min.	22	mm
D_a	max.	30	mm
D_b	max.	31.2	mm
r_a	max.	0.3	mm
r_b	max.	0.15	mm
d_n		24.5	mm

Calculation data

Basic dynamic load rating	C	3.64	kN
Basic static load rating	C₀	2.5	kN
Fatigue load limit	P_u	0.106	kN
Attainable speed for grease lubrication		48000	r/min
Attainable speed for oil-air lubrication		75000	r/min
Ball diameter	D_w	3.175	mm
Number of balls	z	17
Reference grease quantity	G_ref	0.18	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	32	N
Static axial stiffness, preload class A		58	N/µm
Preload class B	G_B	100	N
Static axial stiffness, preload class B		92	N/µm
Preload class C	G_C	200	N
Static axial stiffness, preload class C		125	N/µm
Calculation factors
Calculation factor	f	1.08
Calculation factor	f₁	0.97
Calculation factor	f_2A	1
Calculation factor	f_2B	1.09
Calculation factor	f_2C	1.17
Calculation factor	f_HC	1.02
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

0.017

Model Number: 71804 ACD/HCP4
Inner Diameter：20mm Outer Diameter：32mm 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：2026-08-20
Application:luminescent reagent,product accessories,Oral Image,medical Equipment,chemical,Switch,motor,machine tool spindle,reducer,oral medical device,sheet industry
Similar models:71804 CD/HCP4 71804 CD/P4 71804 ACD/HCP4 71804 ACD/P4
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Model No. Inner Diameter Outer Diameter Width Type

BD-23136-2CS5K/VT143-H 3136 L
409500
75052
FYTWK 35 YTA
PCM 11512050 M

Purchase the SKF 71804 ACD/HCP4 Please fill in the following

Hot number： 260x290x16 HDS2 R BD-231/800 CAK/W33-AOH 31/800 305428 D 313535 D 51117 51106 533803 7308 BECBY 7310 BEGAPH 7312 BECCM AOH 31/530 BT1-8010/HA4 FYWK 1.1/4 YTA NJ 2310 ECP SSAFS 22516 x 2.5/8 T

Model No.	Inner Diameter	Outer Diameter	Width	Type
BD-23136-2CS5K/VT143-H 3136 L
409500
75052
FYTWK 35 YTA
PCM 11512050 M