Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 71811 CD/P4

71811 CD/P4

Dimensions

d		55	mm
D		72	mm
B		9	mm
d₁		60.7	mm
d₂		60.7	mm
D₁		66.5	mm
r_1,2	min.	0.3	mm
r_3,4	min.	0.15	mm
a		13	mm

Abutment dimensions

d_a	min.	57	mm
d_b	min.	57	mm
D_a	max.	70	mm
D_b	max.	71.2	mm
r_a	max.	0.3	mm
r_b	max.	0.15	mm
d_n		61.3	mm

Calculation data

Basic dynamic load rating	C	10.1	kN
Basic static load rating	C₀	10.8	kN
Fatigue load limit	P_u	0.455	kN
Attainable speed for grease lubrication		18000	r/min
Attainable speed for oil-air lubrication		28000	r/min
Ball diameter	D_w	4.762	mm
Number of balls	z	29
Reference grease quantity	G_ref	0.88	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	55	N
Static axial stiffness, preload class A		53	N/µm
Preload class B	G_B	165	N
Static axial stiffness, preload class B		91	N/µm
Preload class C	G_C	330	N
Static axial stiffness, preload class C		135	N/µm
Calculation factors
Calculation factor	f	1.27
Calculation factor	f₁	1
Calculation factor	f_2A	1
Calculation factor	f_2B	1.09
Calculation factor	f_2C	1.16
Calculation factor	f_HC	1
Calculation factor	f₀	17.1

Mass

Mass bearing

0.081

Model Number: 71811 CD/P4
Inner Diameter：55mm Outer Diameter：72mm Width：9mm
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：2026-04-16
Application:DC generators,inorganic chemical,tobacco machinery,industrial fans,other processing,water protection,electrostatic protection,ventilation heating equipment,chemical instruments,horizontal processing,static control
Similar models:71811 CD/HCP4 71811 ACD/HCP4 71811 CD/P4
BEARING POWER International Trading Co.,Ltd. specialize in 71811CD/P4 products，there is large inventory of SKF 71811 CD/P4 Angular contact ball bearings, super-precision. We has been built up long-term cooperation with SKF company, could make a bulk order of the 71811 CD/P4 Which SKF 71811CD/P4 is the most authentic, must choose BEARING POWER, what a whole variety, reasonable price, guaranteed quality, prompt delivery via Global express. Any inquiry, never hesitate to E-mail or call +86-022-58519721 to contact us.

Model No.	Inner Diameter	Outer Diameter	Width	Type
380x420x20 HDS2 R	380	420	20	Seals
400951	85	-	-	Seals
50x90x10 HMS5 V	50	90	10	Seals
596098	320.675	-	-	Seals
619/1000 MB	1000	1320	140	Bearings, units and housings
619/8-2Z	8	19	6	Bearings, units and housings
6320/C3VL0241	100	215	47	Bearings, units and housings
7308 BECAP	40	90	23	Bearings, units and housings
BTM 110 ATN9/HCP4CDB	110	170	54	Bearings, units and housings
NU 419 M	95	240	55	Bearings, units and housings
SHR 60	60	-	-	Coupling systems
SSAFS 23044 KAT x 7.15/16	201.6125	-	-	Bearings, units and housings

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