Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71906 ACE/HCP4A

71906 ACE/HCP4A

Dimensions

d		30	mm
D		47	mm
B		9	mm
d₁		35.8	mm
d₂		34.4	mm
D₁		41.39	mm
r_1,2	min.	0.3	mm
r_3,4	min.	0.15	mm
a		14.3	mm

Abutment dimensions

d_a	min.	32	mm
d_b	min.	32	mm
D_a	max.	45	mm
D_b	max.	46.2	mm
r_a	max.	0.3	mm
r_b	max.	0.15	mm
d_n		36.8	mm

Calculation data

Basic dynamic load rating	C	5.27	kN
Basic static load rating	C₀	3.1	kN
Fatigue load limit	P_u	0.132	kN
Attainable speed for grease lubrication		44000	r/min
Attainable speed for oil-air lubrication		70000	r/min
Ball diameter	D_w	4.762	mm
Number of balls	z	18
Reference grease quantity	G_ref	0.6	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	48	N
Static axial stiffness, preload class A		61	N/µm
Preload class B	G_B	145	N
Static axial stiffness, preload class B		94	N/µm
Preload class C	G_C	290	N
Static axial stiffness, preload class C		123	N/µm
Calculation factors
Calculation factor	f	1.08
Calculation factor	f₁	0.98
Calculation factor	f_2A	1
Calculation factor	f_2B	1.04
Calculation factor	f_2C	1.08
Calculation factor	f_HC	1.01
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

0.045

Model Number: 71906 ACE/HCP4A
Inner Diameter：30mm Outer Diameter：47mm 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：2026-06-24
Application:Storage Device,Beauty and Body,manual Tools,switch,metal mold,ignition system,medical equipment,medical equipment,Forklift industry,turret industry,Cylinder Pneumatic Treatment Element
Similar models:71906 ACE/P4A S71906 CE/P4A 71906 ACE/P4AH 71906 CE/P4AH 71906 ACE/HCP4A S71906 ACD/HCP4A 71906 CD/HCP4A 71906 CE/HCP4A 71906 ACE/HCP4AH 71906 ACB/HCP4A
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Model No. Inner Diameter Outer Diameter Width Type

220
28670
7204 BECBPH
BT2B 334069/HA3
S7008 ACD/P4A

Purchase the SKF 71906 ACE/HCP4A Please fill in the following

Hot number： 10x19x7 HMS5 V1 110x130x12 CRW1 R 30218/DF 400125 4623 7203 ACD/HCP4A 99863 D/W R155 R-2ZS MS 31/670 NNU 4956 BK/SPW33 PBMF 557050 M1G1 SAF 22517 x 3 TLC SAF 22536 x 6.3/8 TLC SHR 42 W 6209-2Z

Model No.	Inner Diameter	Outer Diameter	Width	Type
220
28670
7204 BECBPH
BT2B 334069/HA3
S7008 ACD/P4A