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

71911 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_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		64.8	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
Attainable speed for oil-air lubrication		38000	r/min
Ball diameter	D_w	5.556	mm
Number of balls	z	28
Reference grease quantity	G_ref	2.58	cm³
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

0.17

Model Number: 71911 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:Material handling equipment,medical treatment,Microwave Equipment,lifting upgrade,wire industry,Spectrum Products,Cylinder Standard,small appliances,medical equipment,CNC,
Similar models:71911 ACD/HCP4AL 71911 CB/P4A 71911 CB/HCP4A 71911 ACE/P4AL S71911 ACD/P4A 71911 CD/P4A S71911 ACE/HCP4A S71911 ACB/P4A 71911 CB/P4AL 71911 ACE/P4AH1
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Model No.	Inner Diameter	Outer Diameter	Width	Type
16440	41.275	82.58	12.7	Seals
34306/34478	77.788	121.442	24.608	Bearings, units and housings
7024 CD/HCP4AH1	120	180	28	Bearings, units and housings
7209 BE-2RZP	45	85	19	Bearings, units and housings
80 VA R	72	-	-	Seals
87143	-	-	30	Seals
BMD-6206/064S2/UA008A	30	62	22.2	Bearings, units and housings
BD-C 2212 KV-H 312	55	110	28	Bearings, units and housings
OKCX 280	280		-
SYNT 55 LW	55	-	-	Bearings, units and housings
YEL 207-107-2F	36.513	72	37.6	Bearings, units and housings
ZW 50x62	50	62	2	Seals

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Hot number： 16008/HR11QN 18922 23136-2CS5/VT143 471141 50.3x67.0x14.7 TP 6217-2RS1 7010 ACD/P4A 71918 ACD/P4A 840 VE R PCZ 0712 M PWM 253040 SAF 23032 KAT x 5.7/16 SNW 117x2.15/16 W 637/8-2Z Z 010