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

71906 ACD/HCP4A

Dimensions

d		30	mm
D		47	mm
B		9	mm
d₁		35.6	mm
d₂		35.6	mm
D₁		41.4	mm
r_1,2	min.	0.3	mm
r_3,4	min.	0.2	mm
a		13.6	mm

Abutment dimensions

d_a	min.	32	mm
d_b	min.	32	mm
D_a	max.	45	mm
D_b	max.	45.6	mm
r_a	max.	0.3	mm
r_b	max.	0.2	mm
d_n		36.8	mm

Calculation data

Basic dynamic load rating	C	6.76	kN
Basic static load rating	C₀	4.3	kN
Fatigue load limit	P_u	0.183	kN
Attainable speed for grease lubrication		32000	r/min
Attainable speed for oil-air lubrication		48000	r/min
Ball diameter	D_w	4.762	mm
Number of balls	z	20
Reference grease quantity	G_ref	0.63	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	40	N
Static axial stiffness, preload class A		72	N/µm
Preload class B	G_B	80	N
Static axial stiffness, preload class B		93	N/µm
Preload class C	G_C	160	N
Static axial stiffness, preload class C		121	N/µm
Preload class D	G_D	320	N
Static axial stiffness, preload class D		161	N/µm
Calculation factors
Calculation factor	f	1.08
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

0.045

Model Number: 71906 ACD/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：2026-08-20
Application:vertical sawing machine,Vertical machining,Anesthetic Equipment,screen filter,forklift industry,Performance test,Broadcasting System,ship special,standing experimental equipment,Energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving,packaging machinery
Similar models:71906 ACE/P4A 71906 ACB/HCP4A S71906 CB/P4A S71906 CE/P4A 71906 CE/P4AL 71906 ACE/HCP4A 71906 ACE/P4AH S71906 ACE/HCP4A S71906 ACB/P4A 71906 CD/P4A
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Model No. Inner Diameter Outer Diameter Width Type

81214 TN
OKBS 42
NU 328 ECJ
OKBS 82
W 638/2.5-2Z

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

Hot number： 130 VA R 23936 CCK/W33 331978 BG 401804 8620 91337 FSAF 22617 x 2.7/8 NUKR 47 XA P 25 TR PCM 250255100 M S7010 CB/HCP4A S71910 CB/P4A SYF 30 FM W 61704-2RS1 W 6206-2Z

Model No.	Inner Diameter	Outer Diameter	Width	Type
81214 TN
OKBS 42
NU 328 ECJ
OKBS 82
W 638/2.5-2Z