Bearings, units and housings -- Super-precision bearings -- Angular contact ball bearings -- Angular contact ball bearings, super-precision -- SKF S7004 ACD/P4A

S7004 ACD/P4A

Dimensions

d		20	mm
D		42	mm
B		12	mm
d₁		27.1	mm
d₂		27.1	mm
D₂		37	mm
r_1,2	min.	0.6	mm
r_3,4	min.	0.3	mm
a		13.3	mm

Abutment dimensions

d_a	min.	23.2	mm
d_a	max.	26.6	mm
d_b	min.	23.2	mm
d_b	max.	26.6	mm
D_a	max.	38.8	mm
D_b	max.	40	mm
r_a	max.	0.6	mm
r_b	max.	0.3	mm

Calculation data

Basic dynamic load rating	C	8.32	kN
Basic static load rating	C₀	4.15	kN
Fatigue load limit	P_u	0.173	kN
Attainable speed for grease lubrication		38000	r/min
Ball diameter	D_w	6.35	mm
Number of balls	z	12
Preload and stiffness (back-to-back, face-to-face)
Preload class A	G_A	50	N
Static axial stiffness, preload class A		54	N/µm
Preload class B	G_B	100	N
Static axial stiffness, preload class B		69	N/µm
Preload class C	G_C	200	N
Static axial stiffness, preload class C		90	N/µm
Preload class D	G_D	400	N
Static axial stiffness, preload class D		120	N/µm
Calculation factors
Calculation factor	f	1.03
Calculation factor	f₁	0.99
Calculation factor	f_2A	1
Calculation factor	f_2B	1.02
Calculation factor	f_2C	1.05
Calculation factor	f_2D	1.08
Calculation factor	f_HC	1
Calculation factor	e	0.68
Calculation factor (single, tandem)	Y₂	0.87
Calculation factor (single, tandem)	Y₀	0.38
Calculation factor (single, tandem)	X₂	0.41
Calculation factor (back-to-back, face-to-face)	Y₁	0.92
Calculation factor (back-to-back, face-to-face)	Y₂	1.41
Calculation factor (back-to-back, face-to-face)	Y₀	0.76
Calculation factor (back-to-back, face-to-face)	X₂	0.67

Mass

Mass bearing

0.068

Model Number: S7004 ACD/P4A
Inner Diameter：20mm Outer Diameter：42mm Width：12mm
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:Grinding and polishing equipment,Oral Image,education model Instruments,Broadcasting System,Display Devices,set bacteria instrument,Spectrum Products,generator,Perfusion device,granulator,Other Machine Tools
Similar models:7004 CE/P4AH1 S7004 CE/HCP4A 7004 CE/P4A S7004 ACD/P4A S7004 CE/P4A 7004 CE/HCP4A 7004 CD/P4A 7004 CD/HCP4AH 7004 ACD/P4A 7004 ACE/P4AL1
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