Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 728 CD/P4A

728 CD/P4A

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		70000	r/min
Attainable speed for oil-air lubrication		110000	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		12	N/µm
Preload class B	G_B	28	N
Static axial stiffness, preload class B		15	N/µm
Preload class C	G_C	56	N
Static axial stiffness, preload class C		21	N/µm
Preload class D	G_D	112	N
Static axial stiffness, preload class D		30	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	1.05
Calculation factor	f_HC	1
Calculation factor	f₀	7.9

Mass

Mass bearing

0.017

Model Number: 728 CD/P4A
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:bathroom facilities,Warehouse Shelf Equipment,ECG,food add,lifting upgrade,Water Monitoring,water protection,Individual Wire,pneumatic,Generator,plastic blow molding
Similar models:728 CD/HCP4A 7280 BM 728 ACD/HCP4A 728 CD/P4A 728 ACD/P4A 306728
BEARING POWER International Trading Co.,Ltd. specialize in 728CD/P4A products，there is large inventory of SKF 728 CD/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 728 CD/P4A Which SKF 728CD/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.

Model No.	Inner Diameter	Outer Diameter	Width	Type
20x32x6 HMSA10 V	20	32	6	Seals
25641	65.1002	92.02	11.13	Seals
313823	260	370	-	Bearings, units and housings
35x72x7 HMSA10 RG	35	72	7	Seals
42x67x10 HMS5 RG	42	67	10	Seals
719/8 ACE/P4A	8	19	6	Bearings, units and housings
FSAF 1615 x 2.3/8 T	60.325	-	-	Bearings, units and housings
IR 25x30x17	25	30	17	Bearings, units and housings
IR 40x45x17	40	45	17	Bearings, units and housings
IR 95x105x26	95	105	26	Bearings, units and housings
NNC 4948 CV	240	320	80	Bearings, units and housings
SNP 3084x15.3/4	400.05	420	215.5952	Bearings, units and housings

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