71905 ACD/P4A - High precision angular contact ball bearing - Precision ball bearing

Product model	71905 ACD/P4A
d	25 mm
D	42 mm
B	9 mm
Limiting speed	53000 r/min
d1	30.6mm
d2	30.6mm
D1	36.4mm
r1,2	min.0.3mm
r3,4	min.0.2mm
a	12.4mm
da	min.27mm
db	min.27mm
Da	max.40mm
Db	max.40.6mm
Fillet radius(ra)	max.0.3mm
Fillet radius(rb)	max.0.2mm
Fuel injector position(dn)	31.8mm
Pu	0.16kN
Oil and gas lubrication can reach the speed	34000r/min
Contact angle(α)	25°
Ball diameter(Dw)	4.762mm
The number of pages(z)	18
Reference grease quantity(Gref)	0.54cm³
Preload level A(GA)	40N
Static axial stiffness of preload level A	60N/µm
Preload class B(GB)	80N
Static axial stiffness of preload class B	78N/µm
Preload level C(GC)	160N
Static axial stiffness of preload level C	101N/µm
Preload level D(GD)	320N
Static axial stiffness of preload level D	134N/µm
Correction factor depends on bearing series and size (f)	1.07
The correction factor depends on the contact angle(f1)	0.98
Correction factor, preload class A(f2A)	1
Correction factor, preload class B(f2B)	1.04
Correction factor, preload class C(f2C)	1.08
Correction factor, preload class D(f2D)	1.14
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	0.042kg

71905 ACD/P4A / High precision angular contact ball bearing / Precision ball bearing