Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71904 ACD/HCP4A

71904 ACD/HCP4A

Dimensions

d		20	mm
D		37	mm
B		9	mm
d₁		25.6	mm
d₂		25.6	mm
D₁		31.4	mm
r_1,2	min.	0.3	mm
r_3,4	min.	0.2	mm
a		11.2	mm

Abutment dimensions

d_a	min.	22	mm
d_b	min.	22	mm
D_a	max.	35	mm
D_b	max.	35.6	mm
r_a	max.	0.3	mm
r_b	max.	0.2	mm
d_n		26.8	mm

Calculation data

Basic dynamic load rating	C	5.72	kN
Basic static load rating	C₀	3.05	kN
Fatigue load limit	P_u	0.129	kN
Attainable speed for grease lubrication		45000	r/min
Attainable speed for oil-air lubrication		67000	r/min
Ball diameter	D_w	4.762	mm
Number of balls	z	15
Reference grease quantity	G_ref	0.45	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	35	N
Static axial stiffness, preload class A		56	N/µm
Preload class B	G_B	70	N
Static axial stiffness, preload class B		73	N/µm
Preload class C	G_C	140	N
Static axial stiffness, preload class C		95	N/µm
Preload class D	G_D	280	N
Static axial stiffness, preload class D		125	N/µm
Calculation factors
Calculation factor	f	1.05
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

0.033

Model Number: 71904 ACD/HCP4A
Inner Diameter：20mm Outer Diameter：37mm Width：9mm
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:Doppler,axle lathe,chamfer,Machine Tool Accessories,plastic blow molding,plastic molding,Processing machinery,lifting chain,Dental Drill etc,welding equipment,electrocardiograph
Similar models:S71904 CD/HCP4A 71904 CE/P4AL S71904 ACE/HCP4A 71904 CE/P4A S71904 CE/HCP4A 71904 CE/HCP4AH 71904 CE/P4AH 71904 ACE/HCP4AL 71904 CD/P4A S71904 CE/P4A
BEARING POWER International Trading Co.,Ltd. specialize in 71904ACD/HCP4A products，there is large inventory of SKF 71904 ACD/HCP4A Angular contact ball bearings, super-precision. We has been built up long-term cooperation with SKF company, could make a bulk order of the 71904 ACD/HCP4A Which SKF 71904ACD/HCP4A is the most authentic, must choose BEARING POWER, what a whole variety, reasonable price, guaranteed quality, prompt delivery via Global express. Any inquiry, never hesitate to E-mail or call +86-022-58519721 to contact us.

Model No.	Inner Diameter	Outer Diameter	Width	Type
13992	35.5346	58.22	11.91	Seals
3 VA R	2.5	-	-	Seals
34x62x10 HMSA10 RG	34	62	10	Seals
7219 CD/P4A	95	170	32	Bearings, units and housings
D/W R12-2RS1	19.05	41.275	11.113	Bearings, units and housings
NA 6905	25	42	30	Bearings, units and housings
OH 3176 H	360	490	264	Bearings, units and housings
PF 40 TR	40	-	-	Bearings, units and housings
PSM 162212 A51	16	22	12	Bearings, units and housings
RN-2.5x15.8 BF/G2	-	-	2.5	Bearings, units and housings
RNAO 55x68x20	55	68	20	Bearings, units and housings
SYWK 1.1/4 AYTA	31.75	-	-	Bearings, units and housings

Purchase the SKF 71904 ACD/HCP4A Please fill in the following

Hot number： 16904 230/630 CA/W33 32248 6304-RSH BT4-8147 G/HA1 NCF 3034 CV NJ 240 ECM NN 3011 TN/SP NNU 41/1060 K30M/W33 PCZ 4056 E PSM 507070 A51 SE 509 SNW 8x1.3/8 SYJ 507 YSPAG 209