Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF S7021 CD/P4A

S7021 CD/P4A

Dimensions

d		105	mm
D		160	mm
B		26	mm
d₁		121.9	mm
d₂		121.9	mm
D₂		146.75	mm
r_1,2	min.	2	mm
r_3,4	min.	1	mm
a		30.8	mm

Abutment dimensions

d_a	min.	114	mm
d_a	max.	121.3	mm
d_b	min.	114	mm
d_b	max.	121.3	mm
D_a	max.	151	mm
D_b	max.	155	mm
r_a	max.	2	mm
r_b	max.	1	mm

Calculation data

Basic dynamic load rating	C	95.6	kN
Basic static load rating	C₀	96.5	kN
Fatigue load limit	P_u	3.6	kN
Attainable speed for grease lubrication		8000	r/min
Ball diameter	D_w	17.462	mm
Number of balls	z	21
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	360	N
Static axial stiffness, preload class A		117	N/µm
Preload class B	G_B	720	N
Static axial stiffness, preload class B		159	N/µm
Preload class C	G_C	1440	N
Static axial stiffness, preload class C		223	N/µm
Preload class D	G_D	2880	N
Static axial stiffness, preload class D		324	N/µm
Calculation factors
Calculation factor	f	1.15
Calculation factor	f₁	1
Calculation factor	f_2A	1
Calculation factor	f_2B	1.02
Calculation factor	f_2C	1.05
Calculation factor	f_2D	1.09
Calculation factor	f_HC	1
Calculation factor	f₀	15.7

Mass

Mass bearing

1.61

Model Number: S7021 CD/P4A
Inner Diameter：105mm Outer Diameter：160mm Width：26mm
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：2026-04-17
Application:glass processing machine,Other Measurements,stirrer,tire industry,lifting upgrade,machine lathe,respirator,flow control valve,Safety protection,wire industry,dye pigments
Similar models:7021 CD/HCP4A 7021 ACD/HCP4AL 7021 ACD/HCP4AH1 7021 CD/P4AL 7021 CD/P4AH1 7021 CD/HCP4AH1 7021 ACD/P4AH1 7021 CD/P4A S7021 ACD/HCP4A 7021 ACD/HCP4A
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