Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF S7028 CD/HCP4A

S7028 CD/HCP4A

Dimensions

d		140	mm
D		210	mm
B		33	mm
d₁		161.6	mm
d₂		161.6	mm
D₂		193.1	mm
r_1,2	min.	2	mm
r_3,4	min.	1	mm
a		40.1	mm

Abutment dimensions

d_a	min.	149	mm
d_a	max.	161	mm
d_b	min.	149	mm
d_b	max.	161	mm
D_a	max.	201	mm
D_b	max.	205	mm
r_a	max.	2	mm
r_b	max.	1	mm

Calculation data

Basic dynamic load rating	C	153	kN
Basic static load rating	C₀	166	kN
Fatigue load limit	P_u	5.3	kN
Attainable speed for grease lubrication		7500	r/min
Ball diameter	D_w	22.225	mm
Number of balls	z	22
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	570	N
Static axial stiffness, preload class A		168	N/µm
Preload class B	G_B	1140	N
Static axial stiffness, preload class B		228	N/µm
Preload class C	G_C	2280	N
Static axial stiffness, preload class C		320	N/µm
Preload class D	G_D	4560	N
Static axial stiffness, preload class D		464	N/µm
Calculation factors
Calculation factor	f	1.16
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	1.02
Calculation factor	f₀	15.8

Mass

Mass bearing

2.85

Model Number: S7028 CD/HCP4A
Inner Diameter：140mm Outer Diameter：210mm Width：33mm
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:tray industry,Internal thread type,wall materials,agriculture,sleep monitoring,wall industry,Forming mold,Pest Monitoring,auto tools,reducer,security equipment
Similar models:7028 ACD/HCP4AL 7028 ACD/P4AL 7028 CD/HCP4A 7028 CD/HCP4AH1 7028 CD/HCP4AL 7028 CD/P4A S7028 ACD/P4A 7028 ACD/P4A 7028 CD/P4AL S7028 ACD/HCP4A
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