71912 ACE/P4AH1 - High precision angular contact ball bearing - Precision ball bearing

Product model	71912 ACE/P4AH1
d	60 mm
D	85 mm
B	13 mm
Limiting speed	30000 r/min
d1	67.75mm
d2	65.7mm
D1	77.3mm
Lubrication hole diameter (K)	0.5mm
C1	3.83mm
r1,2	min.1mm
r3,4	min.0.3mm
a	23.5mm
da	min.64.6mm
db	min.62mm
Da	max.80.4mm
Db	max.83mm
Fillet radius(ra)	max.1mm
Fillet radius(rb)	max.0.3mm
Fuel injector position(dn)	69.6mm
Pu	0.475kN
Oil and gas lubrication can reach the speed	19500r/min
Contact angle(α)	25°
Ball diameter(Dw)	7.938mm
The number of pages(z)	23
Reference grease quantity(Gref)	2.5cm³
Preload level A(GA)	139N
Static axial stiffness of preload level A	115N/µm
Preload class B(GB)	418N
Static axial stiffness of preload class B	173N/µm
Preload level C(GC)	836N
Static axial stiffness of preload level C	228N/µm
Correction factor depends on bearing series and size (f)	1.13
The correction factor depends on the contact angle(f1)	0.99
Correction factor, preload class A(f2A)	1
Correction factor, preload class B(f2B)	1.04
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	0.19kg

71912 ACE/P4AH1 / High precision angular contact ball bearing / Precision ball bearing