Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 7221 ACD/P4A

7221 ACD/P4A

Dimensions

d		105	mm
D		190	mm
B		36	mm
d₁		131.2	mm
d₂		131.2	mm
D₁		163.8	mm
r_1,2	min.	2.1	mm
r_3,4	min.	1.1	mm
a		52.6	mm

Abutment dimensions

d_a	min.	117	mm
d_b	min.	117	mm
D_a	max.	178	mm
D_b	max.	183	mm
r_a	max.	2	mm
r_b	max.	1	mm
d_n		138.4	mm

Calculation data

Basic dynamic load rating	C	163	kN
Basic static load rating	C₀	146	kN
Fatigue load limit	P_u	5.1	kN
Attainable speed for grease lubrication		6700	r/min
Attainable speed for oil-air lubrication		10000	r/min
Ball diameter	D_w	26.988	mm
Number of balls	z	15
Reference grease quantity	G_ref	48.333	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	1000	N
Static axial stiffness, preload class A		308	N/µm
Preload class B	G_B	2000	N
Static axial stiffness, preload class B		399	N/µm
Preload class C	G_C	4000	N
Static axial stiffness, preload class C		527	N/µm
Preload class D	G_D	8000	N
Static axial stiffness, preload class D		708	N/µm
Calculation factors
Calculation factor	f	1.08
Calculation factor	f₁	0.99
Calculation factor	f_2A	1
Calculation factor	f_2B	1.01
Calculation factor	f_2C	1.02
Calculation factor	f_2D	1.05
Calculation factor	f_HC	1
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

3.87

Model Number: 7221 ACD/P4A
Inner Diameter：105mm Outer Diameter：190mm Width：36mm
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:linear drive,generator,orthodontic material,Cylinder Type,chemical raw materials and reagents,Oral Image,Liposuction device,sleep monitoring,supporting facilities,generator,filter paper products
Similar models:72212/72487 7221 BECBP 7221 ACD/P4A 7221 ACD/HCP4A 7221 CD/P4A 7221 BECBM 7221 BEP
BEARING POWER International Trading Co.,Ltd. specialize in 7221ACD/P4A products，there is large inventory of SKF 7221 ACD/P4A Angular contact ball bearings, super-precision. We has been built up long-term cooperation with SKF company, could make a bulk order of the 7221 ACD/P4A Which SKF 7221ACD/P4A 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.

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OKCS 330	330		-
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Hot number： 16008 2220 22340 24060 CCK30/W33 + AOH 24060 G 330608 C 445 VRME R 51088 F 6304/VA201 7317 BECBF 91327 DMB 16/20 FYTB 1.15/16 LDW NNUP 4964 B/HB1W33 SIL 10 E W 63805-2RZ