Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 728 CD/HCP4A

728 CD/HCP4A

Dimensions

d		8	mm
D		24	mm
B		8	mm
d₁		13.1	mm
d₂		13.1	mm
D₁		18.9	mm
r_1,2	min.	0.3	mm
r_3,4	min.	0.2	mm
a		6.2	mm

Abutment dimensions

d_a	min.	10.4	mm
d_b	min.	10.4	mm
D_a	max.	21.6	mm
D_b	max.	22.2	mm
r_a	max.	0.3	mm
r_b	max.	0.2	mm
d_n		14.3	mm

Calculation data

Basic dynamic load rating	C	3.71	kN
Basic static load rating	C₀	1.37	kN
Fatigue load limit	P_u	0.057	kN
Attainable speed for grease lubrication		85000	r/min
Attainable speed for oil-air lubrication		130000	r/min
Ball diameter	D_w	4.762	mm
Number of balls	z	8
Reference grease quantity	G_ref	0.228	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	14	N
Static axial stiffness, preload class A		13	N/µm
Preload class B	G_B	28	N
Static axial stiffness, preload class B		17	N/µm
Preload class C	G_C	56	N
Static axial stiffness, preload class C		23	N/µm
Preload class D	G_D	112	N
Static axial stiffness, preload class D		33	N/µm
Calculation factors
Calculation factor	f	1.02
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	1.06
Calculation factor	f_HC	1.01
Calculation factor	f₀	7.9

Mass

Mass bearing

0.015

Model Number: 728 CD/HCP4A
Inner Diameter：8mm Outer Diameter：24mm Width：8mm
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:economic mold,rehabilitation training equipment,Die,Warehouse Shelf Equipment,axle lathe,engine,defogging and degreasing,industry test,Workpiece,Broadcasting System,Spectral Products
Similar models:728 ACD/P4A 728 CD/HCP4A 728 ACD/HCP4A 7280 BM 306728 728 CD/P4A
BEARING POWER International Trading Co.,Ltd. specialize in 728CD/HCP4A products，there is large inventory of SKF 728 CD/HCP4A Angular contact ball bearings, super-precision. We has been built up long-term cooperation with SKF company, could make a bulk order of the 728 CD/HCP4A Which SKF 728CD/HCP4A 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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