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：2026-04-16
Application:other lathe,water protection,Plastic Equipment,Pump,vertical sawing machine,machine tool spindle,glass processing machine,Hairbrush device,packing equipment,crimping tools,Gripper Swing
Similar models:728 CD/P4A 728 ACD/P4A 728 ACD/HCP4A 728 CD/HCP4A 7280 BM 306728
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.

Model No.	Inner Diameter	Outer Diameter	Width	Type
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19995	50.8	76.2	7.95	Seals
59196 F	480	580	60	Bearings, units and housings
61960 MA	300	420	56	Bearings, units and housings
6379/K-6320	65.088	135.755	53.975	Bearings, units and housings
AXK 7095	70	95	4	Bearings, units and housings
FYWK 15/16 YTA	23.812	-	-	Bearings, units and housings
GE 300 TXA-2LS	300	430	165	Bearings, units and housings
HA 2330	131.7625	150	139	Bearings, units and housings
HME 3088	60	-	440	Bearings, units and housings
S71917 CD/HCP4A	85	120	18	Bearings, units and housings
YAT 212-204	57.15	110	48.5	Bearings, units and housings

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Hot number： 1800 VRME R 315835 A 38x55x10 HMSA10 RG 4202 ATN9 470971 63.2x83.1x19.3 TP K 10x14x13 TN KMT 40 NUP 204 ECP P 47 R-12 TF S71908 CB/HCP4A SAF 1511 T SAF 1518 x 3.1/4 T SYE 2 3/4 N-118 W 63802 R