Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF 7228 CD/HCP4A

7228 CD/HCP4A

Dimensions

d		140	mm
D		250	mm
B		42	mm
d₁		176.8	mm
d₂		176.8	mm
D₁		213.2	mm
r_1,2	min.	3	mm
r_3,4	min.	1.5	mm
a		47.3	mm

Abutment dimensions

d_a	min.	154	mm
d_b	min.	154	mm
D_a	max.	236	mm
D_b	max.	241	mm
r_a	max.	2.5	mm
r_b	max.	1.5	mm
d_n		184.8	mm

Calculation data

Basic dynamic load rating	C	221	kN
Basic static load rating	C₀	240	kN
Fatigue load limit	P_u	7.35	kN
Attainable speed for grease lubrication		7000	r/min
Attainable speed for oil-air lubrication		10000	r/min
Ball diameter	D_w	30.162	mm
Number of balls	z	18
Reference grease quantity	G_ref	83.931	cm³
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	850	N
Static axial stiffness, preload class A		181	N/µm
Preload class B	G_B	1700	N
Static axial stiffness, preload class B		245	N/µm
Preload class C	G_C	3400	N
Static axial stiffness, preload class C		339	N/µm
Preload class D	G_D	6800	N
Static axial stiffness, preload class D		485	N/µm
Calculation factors
Calculation factor	f	1.09
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	15.2

Mass

Mass bearing

6.92

Model Number: 7228 CD/HCP4A
Inner Diameter：140mm Outer Diameter：250mm Width：42mm
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:Energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving energy saving,expectoration machine,universal category,industrial equipment,air conditioning tools,survey accessories,squeeze machine etc,paint paint,Hair styling device,Individual Wire,medical equipment
Similar models:7228 ACD/P4A 7228 BM 7228 ACD/HCP4A 7228 BGAM 7228 BCBM 7228 CD/HCP4A 7228 CD/P4A
BEARING POWER International Trading Co.,Ltd. specialize in 7228CD/HCP4A products，there is large inventory of SKF 7228 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 7228 CD/HCP4A Which SKF 7228CD/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
1013320	257.175	298.45	17.48	Seals
BD-23048 CCK/W33-AOH 3048	220	360	92	Bearings, units and housings
25877/25821	34.925	73.025	23.812	Bearings, units and housings
26x37x7 HMSA10 RG	26	37	7	Seals
3208 A	40	80	30.2	Bearings, units and housings
415502	1405	-	-	Seals
46x65x10 HMS5 V	46	65	10	Seals
5 VS R	4	-	-	Seals
7021 ACD/HCP4AL	105	160	26	Bearings, units and housings
86907	-	-	38.1	Seals
K 60x65x30	60	65	30	Bearings, units and housings
NNCF 4840 CV	200	250	50	Bearings, units and housings

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