7204 ACD/HCP4A - High precision angular contact ball bearing - Precision ball bearing

Product model	7204 ACD/HCP4A
d	20 mm
D	47 mm
B	14 mm
Limiting speed	56000 r/min
d1	29.1mm
d2	29.1mm
D1	38.7mm
r1,2	min.1mm
r3,4	min.0.3mm
a	15mm
da	min.25.6mm
db	min.25.6mm
Da	max.41.4mm
Db	max.44.6mm
Fillet radius(ra)	max.1mm
Fillet radius(rb)	max.0.3mm
Fuel injector position(dn)	31.1mm
Pu	0.173kN
Oil and gas lubrication can reach the speed	38000r/min
Contact angle(α)	25°
Ball diameter(Dw)	7.938mm
The number of pages(z)	11
Reference grease quantity(Gref)	1.539cm³
Preload level A(GA)	70N
Static axial stiffness of preload level A	68N/µm
Preload class B(GB)	140N
Static axial stiffness of preload class B	87N/µm
Preload level C(GC)	280N
Static axial stiffness of preload level C	113N/µm
Preload level D(GD)	560N
Static axial stiffness of preload level D	149N/µm
Correction factor depends on bearing series and size (f)	1.03
The correction factor depends on the contact angle(f1)	0.99
Correction factor, preload class A(f2A)	1
Correction factor, preload class B(f2B)	1.01
Correction factor, preload class C(f2C)	1.03
Correction factor, preload class D(f2D)	1.06
Correction factor of hybrid ceramic bearing(fHC)	1.01
Limit value (e)	0.68
Axial load factor (single shaft, tandem shaft)(Y2)	0.87
Axial load factor (single shaft, tandem shaft)(Y0)	0.38
Axial load factor (single shaft, tandem shaft)(X2)	0.41
Axial load factor (back to back, face to face) (Y1)	0.92
Axial load factor (back to back, face to face) (Y2)	1.41
Axial load factor (back to back, face to face) (Y0)	0.76
Radial load factor (back to back, face to face) (X2)	0.67
Weight	0.09kg

7204 ACD/HCP4A / High precision angular contact ball bearing / Precision ball bearing