7900 Series

7900 Series

Description

Angular contact ball bearings have inner and outer ring raceways that are displaced relative to each other in the direction of the bearing axis. This means that these bearings are designed to accommodate combined loads, i.e. simultaneously acting radial and axial loads.

The axial load carrying capacity of angular contact ball bearings increases as the contact angle increases. The contact angle is defined as the angle between the line joining the points of contact of the ball and the raceways in the radial plane, along which the combined load is transmitted from one raceway to another, and a line perpendicular to the bearing axis

The most commonly used designs are:

single row angular contact ball bearings 

double row angular contact ball bearings 

four-point contact ball bearings 


Dimension and Parameters

7900 Series 7900 Series
Bearing Numbers
Single row :7917C
DB :7917DB
DF :7917DF
DT :7917DT
Principal dimensions(mm)
d :85
D :120
B :18
r(min) :1.1
r1(min) :0.6
Basic load ratings(N)
Cr :39000
Cor :40500
Basic load ratings(kgf)
Cr :3950
Cor :4150
Value
fo :16.4
Limiting Speed (rpm)
Grease :8000
Oil :11000
Distance of action point(mm)
a :22.7
Abutment and fillet dimensions
da(min) :92
Da(max) :113
ra(max) :1
Weight
(kg) :0.534
Basic load ratings(duplex bearing) (N)
Cr :63000
Cor :81500
Basic load ratings(duplex bearing) (kgf)
Cr :6450
Cor :8300
Limiting Speed(duplex bearing) (rpm)
Grease :6300
Oil :9000
Distance of action point (duplex bearing)(a0)
back-to-back arrangement :45.5
face-to-face arrangement :9.5
Installation dimensions(duplex bearing)
db(min) :-
Db(max) :115
rb(max) :0.6