71903 ACD/HCP4A - High precision angular contact ball bearing - Precision ball bearing

Product model	71903 ACD/HCP4A
d	17 mm
D	30 mm
B	7 mm
Limiting speed	90000 r/min
d1	20.9mm
d2	20.9mm
D1	25.7mm
r1,2	min.0.3mm
r3,4	min.0.2mm
a	9mm
da	min.19mm
db	min.19mm
Da	max.28mm
Db	max.28.6mm
Fillet radius(ra)	max.0.3mm
Fillet radius(rb)	max.0.2mm
Fuel injector position(dn)	22.1mm
Pu	0.062kN
Oil and gas lubrication can reach the speed	56000r/min
Contact angle(α)	25°
Ball diameter(Dw)	3.969mm
The number of pages(z)	14
Reference grease quantity(Gref)	0.24cm³
Preload level A(GA)	25N
Static axial stiffness of preload level A	46N/µm
Preload class B(GB)	50N
Static axial stiffness of preload class B	60N/µm
Preload level C(GC)	100N
Static axial stiffness of preload level C	78N/µm
Preload level D(GD)	200N
Static axial stiffness of preload level D	103N/µm
Correction factor depends on bearing series and size (f)	1.05
The correction factor depends on the contact angle(f1)	0.98
Correction factor, preload class A(f2A)	1
Correction factor, preload class B(f2B)	1.07
Correction factor, preload class C(f2C)	1.12
Correction factor, preload class D(f2D)	1.17
Correction factor of hybrid ceramic bearing(fHC)	1.04
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	0.015kg

71903 ACD/HCP4A / High precision angular contact ball bearing / Precision ball bearing