71920 ACB/HCP4AL - High precision angular contact ball bearing - Precision ball bearing

Product model	71920 ACB/HCP4AL
d	100 mm
D	140 mm
B	20 mm
Limiting speed	20000 r/min
d1	114.92mm
d2	113.16mm
D2	128.7mm
Width of lubricating groove (b)	2.2mm
C1	10.9mm
Distance from the side of the outer ring to the O-ring(C2)	4.5mm
Distance from the side of the outer ring to the O-ring(C3)	2.9mm
r1,2	min.1.1mm
r3,4	min.0.6mm
a	38.2mm
da	min.106mm
db	min.106mm
Da	max.134mm
Db	max.136.8mm
Fillet radius(ra)	max.1mm
Fillet radius(rb)	max.0.6mm
Pu	0.6kN
Oil and gas lubrication can reach the speed	13000r/min
Contact angle(α)	25°
Ball diameter(Dw)	7.938mm
The number of pages(z)	37
Reference grease quantity(Gref)	9.96cm³
Preload level A(GA)	125N
Static axial stiffness of preload level A	178N/µm
Preload class B(GB)	250N
Static axial stiffness of preload class B	226N/µm
Preload level C(GC)	750N
Static axial stiffness of preload level C	343N/µm
Correction factor depends on bearing series and size (f)	1.11
The correction factor depends on the contact angle(f1)	0.99
Correction factor, preload class A(f2A)	1
Correction factor, preload class B(f2B)	1.02
Correction factor, preload class C(f2C)	1.08
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	0.8kg

71920 ACB/HCP4AL / High precision angular contact ball bearing / Precision ball bearing