Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 7211 CD/P4A

7211 CD/P4A

Dimensions

d		55	mm
D		100	mm
B		21	mm
d₁		68.9	mm
d₂		68.9	mm
D₁		86.1	mm
r_1,2	min.	1.5	mm
r_3,4	min.	0.6	mm
a		21	mm

Abutment dimensions

d_a	min.	64	mm
d_b	min.	64	mm
D_a	max.	91	mm
D_b	max.	95.8	mm
r_a	max.	1.5	mm
r_b	max.	0.6	mm
d_n		72.6	mm

Calculation data

Basic dynamic load rating	C	55.3	kN
Basic static load rating	C₀	43	kN
Fatigue load limit	P_u	1.8	kN
Attainable speed for grease lubrication		14000	r/min
Attainable speed for oil-air lubrication		22000	r/min
Ball diameter	D_w	14.288	mm
Number of balls	z	15
Reference grease quantity	G_ref	8.595	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	210	N
Static axial stiffness, preload class A		72	N/µm
Preload class B	G_B	420	N
Static axial stiffness, preload class B		98	N/µm
Preload class C	G_C	840	N
Static axial stiffness, preload class C		137	N/µm
Preload class D	G_D	1680	N
Static axial stiffness, preload class D		197	N/µm
Calculation factors
Calculation factor	f	1.08
Calculation factor	f₁	1
Calculation factor	f_2A	1
Calculation factor	f_2B	1.01
Calculation factor	f_2C	1.03
Calculation factor	f_2D	1.05
Calculation factor	f_HC	1
Calculation factor	f₀	14.5

Mass

Mass bearing

0.61

Model Number: 7211 CD/P4A
Inner Diameter：55mm Outer Diameter：100mm Width：21mm
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:Insect Count,engineering machinery,power source,storage shelves,thin metal materials,Medium and large motor,Industrial Electromechanical,root canal filling,Forging machine,Industrial,Body shaping
Similar models:S7211 ACD/P4A 7211 CD/P4A 7211 BE-2RZP 7211 BECBY 7211 ACCBM 7211 BEGBY S7211 CD/HCP4A 7211 BECBPH 7211 BECBM S7211 CD/P4A
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Hot number： 31311 332096 E/C725 33700 45x60x7 HMSA10 RG 50x72x10 HMSA10 V 529517 71911 CD/HCP4AL 71915 CD/P4A 71919 CE/HCP4AL AXK 2035 GB 3024 NJ 2210 ECJ NU 228 ECM/C3VL2071 PCMF 151717 E SNL 3152 ATURA