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

71911 CB/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		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		28000	r/min
Attainable speed for oil-air lubrication		43000	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		38	N/µm
Preload class B	G_B	66	N
Static axial stiffness, preload class B		50	N/µm
Preload class C	G_C	200	N
Static axial stiffness, preload class C		80	N/µm
Calculation factors
Calculation factor	f	1.09
Calculation factor	f₁	1
Calculation factor	f_2A	1
Calculation factor	f_2B	1.03
Calculation factor	f_2C	1.08
Calculation factor	f_HC	1.01
Calculation factor	f₀	9.8

Mass

Mass bearing

0.17

Model Number: 71911 CB/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:hydraulic pressure gauge,Film machine,Air,EEG,chamfer,non-motor vehicle Electric car,oral medical device,mechanical annex,Storage Tool,thin metal materials,atomizer class
Similar models:71911 CB/P4A 71911 CB/HCP4A 71911 CB/HCP4AL S71911 CE/HCP4A S71911 ACD/HCP4A S71911 ACE/P4A 71911 ACE/P4A 71911 ACE/HCP4AH1 71911 ACB/HCP4A 71911 ACE/P4AL
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Model No.	Inner Diameter	Outer Diameter	Width	Type
19x35x7 CRW1 R	19	35	7	Seals
213-Z	65	120	23	Bearings, units and housings
412403	1176	-	-	Seals
470451	439	-	-	Seals
524208	304.8	-	-	Seals
71806 CD/HCP4	30	42	7	Bearings, units and housings
91343	-	-	57	Seals
NKXR 17	17	26	25	Bearings, units and housings
NNCL 4952 CV	260	360	100	Bearings, units and housings
NU 411	55	140	33	Bearings, units and housings
SNL 3036 ATURT	160	-	-	Bearings, units and housings
WS 81152	260		13.5	Bearings, units and housings

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