Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71911 ACD/HCP4A

71911 ACD/HCP4A

Dimensions

d		55	mm
D		80	mm
B		13	mm
d₁		62.7	mm
d₂		62.7	mm
D₁		72.3	mm
r_1,2	min.	1	mm
r_3,4	min.	0.3	mm
a		22.4	mm

Abutment dimensions

d_a	min.	59.6	mm
d_b	min.	59.6	mm
D_a	max.	75.4	mm
D_b	max.	78	mm
r_a	max.	1	mm
r_b	max.	0.3	mm
d_n		64.7	mm

Calculation data

Basic dynamic load rating	C	18.2	kN
Basic static load rating	C₀	13.7	kN
Fatigue load limit	P_u	0.585	kN
Attainable speed for grease lubrication		17000	r/min
Attainable speed for oil-air lubrication		28000	r/min
Ball diameter	D_w	7.938	mm
Number of balls	z	23
Reference grease quantity	G_ref	2.49	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	120	N
Static axial stiffness, preload class A		137	N/µm
Preload class B	G_B	240	N
Static axial stiffness, preload class B		179	N/µm
Preload class C	G_C	480	N
Static axial stiffness, preload class C		234	N/µm
Preload class D	G_D	960	N
Static axial stiffness, preload class D		312	N/µm
Calculation factors
Calculation factor	f	1.15
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

0.15

Model Number: 71911 ACD/HCP4A
Inner Diameter：55mm Outer Diameter：80mm Width：13mm
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:Antenna Potentials,other lathe,Gas turbine,,Machine tool accessories,security equipment,aerial work platform,Plastic Equipment,Garment Accessories,training beds etc,Generator
Similar models:71911 CB/HCP4A S71911 CD/P4A S71911 ACB/P4A 71911 ACB/HCP4A S71911 ACD/HCP4A S71911 CB/HCP4A 71911 CD/HCP4AL 71911 CE/P4A S71911 CB/P4A 71911 CE/P4AH1
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Model No. Inner Diameter Outer Diameter Width Type

6304-2RSH
7008 ACE/HCP4AL1
BTM 65 BTN9/P4CDB
NU 407
SAFS 22517 x 2.7/8 TLC

Purchase the SKF 71911 ACD/HCP4A Please fill in the following

Hot number： 217-Z 29268 44x65x10 HMS5 RG 52305 523584 58x80x8 HMS5 RG 6208-2RS1 70x85x8 CRW1 R 7001 ACE/HCP4A 7019 ACB/HCP4A FSAF 22617 HJ 2211 EC NJ 408 MA NUKRE 47 A PSMF 202625 A51

Model No.	Inner Diameter	Outer Diameter	Width	Type
6304-2RSH
7008 ACE/HCP4AL1
BTM 65 BTN9/P4CDB
NU 407
SAFS 22517 x 2.7/8 TLC