71912 ACB/P4AL - High precision angular contact ball bearing - Precision ball bearing

Product model	71912 ACB/P4AL
d	60 mm
D	85 mm
B	13 mm
Limiting speed	30000 r/min
d1	68.94mm
d2	67.73mm
D2	78.36mm
Width of lubricating groove (b)	2mm
C1	6.5mm
Distance from the side of the outer ring to the O-ring(C2)	3.8mm
Distance from the side of the outer ring to the O-ring(C3)	1.7mm
r1,2	min.1mm
r3,4	min.0.3mm
a	23.5mm
da	min.64.6mm
db	min.64.6mm
Da	max.80.4mm
Db	max.83mm
Fillet radius(ra)	max.1mm
Fillet radius(rb)	max.0.3mm
Pu	0.355kN
Oil and gas lubrication can reach the speed	19000r/min
Contact angle(α)	25°
Ball diameter(Dw)	5.556mm
The number of pages(z)	30
Reference grease quantity(Gref)	2.77cm³
Preload level A(GA)	57N
Static axial stiffness of preload level A	94N/µm
Preload class B(GB)	115N
Static axial stiffness of preload class B	122N/µm
Preload level C(GC)	340N
Static axial stiffness of preload level C	182N/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)	1.07
Correction factor of hybrid ceramic bearing(fHC)	1
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	0.2kg

71912 ACB/P4AL / High precision angular contact ball bearing / Precision ball bearing