Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71911 CB/P4A

71911 CB/P4A

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		18.8	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	13.5	kN
Basic static load rating	C₀	13.7	kN
Fatigue load limit	P_u	0.345	kN
Attainable speed for grease lubrication		22000	r/min
Attainable speed for oil-air lubrication		34000	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	33	N
Static axial stiffness, preload class A		34	N/µm
Preload class B	G_B	66	N
Static axial stiffness, preload class B		45	N/µm
Preload class C	G_C	200	N
Static axial stiffness, preload class C		73	N/µm
Calculation factors
Calculation factor	f	1.09
Calculation factor	f₁	1
Calculation factor	f_2A	1
Calculation factor	f_2B	1.02
Calculation factor	f_2C	1.07
Calculation factor	f_HC	1
Calculation factor	f₀	9.8

Mass

Mass bearing

0.18

Model Number: 71911 CB/P4A
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:agriculture,enzyme,Leather Products,Film machine,ventilation equipment,gantry processing,welding equipment,vertical processing,Equipment,car instrument,chromatography
Similar models:71911 ACB/P4A 71911 CB/P4AL 71911 CE/P4AL S71911 ACB/P4A S71911 ACD/P4A 71911 ACE/P4A S71911 CD/P4A S71911 CE/HCP4A 71911 CB/HCP4AL 71911 CE/P4A
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