Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF S71911 ACB/HCP4A

S71911 ACB/HCP4A

Dimensions

d		55	mm
D		80	mm
B		13	mm
d₁		63.94	mm
d₂		62.7	mm
D₂		73.2	mm
r_1,2	min.	1	mm
r_3,4	min.	0.3	mm
a		26	mm

Abutment dimensions

d_a	min.	59.6	mm
d_a	max.	63.3	mm
d_b	min.	59.6	mm
d_b	max.	62.1	mm
D_a	max.	75.4	mm
D_b	max.	78	mm
r_a	max.	1	mm
r_b	max.	0.3	mm

Calculation data

Basic dynamic load rating	C	12.7	kN
Basic static load rating	C₀	12.7	kN
Fatigue load limit	P_u	0.325	kN
Attainable speed for grease lubrication		24000	r/min
Ball diameter	D_w	5.556	mm
Number of balls	z	28
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	55	N
Static axial stiffness, preload class A		98	N/µm
Preload class B	G_B	110	N
Static axial stiffness, preload class B		126	N/µm
Preload class C	G_C	330	N
Static axial stiffness, preload class C		192	N/µm
Calculation factors
Calculation factor	f	1.09
Calculation factor	f₁	0.99
Calculation factor	f_2A	1
Calculation factor	f_2B	1.02
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

0.18

Model Number: S71911 ACB/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：2025-12-09
Application:forming machine,car instrument,inorganic chemical,ignition system,office equipment,machine tool spindle,tapered grinder,Display Devices,reducer,medical equipment,Industrial
Similar models:71911 ACE/P4AL 71911 ACB/P4AL S71911 CE/HCP4A 71911 ACB/P4A 71911 CD/P4AL 71911 ACE/P4A 71911 CE/P4AL S71911 ACD/HCP4A 71911 CB/P4AL 71911 CE/P4AH1
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