NTN - Large Bearings

Deep Groove Ball Bearings
1. Structure and Characteristics
A widely used bearing, the deep groove ball bearing takes
its name from the track formed on both the inner and outer
rings of the bearing. The bearings can sustain radial and
axial loads and the resultant forces of these loads and they
are suitable for high speed operation.
The dimensional table below represents the various cage
models and special shapes. Drawing A is the pressed cage;
drawing B shows the machined cage; drawings C through
F show the position and shape of the notch on the inner ring;
and drawing G shows a bearing with the key groove on the
inner ring. Pressed cages are generally used, though
machined cages are used for larger sized bearings, or
bearings for high speed rotation.
A
B
C D E F G
Deep groove ball bearings drawing
2. Dimensional Accuracy/Rotation Accuracy
Refer to Table 3.3 (Page A-12)
5. Permissible slant angle
0.0006-0.003 radian
3. Recommended Fitting
Refer to Table 4.2 (Page A-24)
4. Bearing Internal Clearance
Refer to Table 5.2 (Page A-30)
6. General Operating Cautions
Slippage between the balls and raceways may occur
when bearings are operated under small loads (about Fr
0.01Cor) and may cause smearing. This is most apparent
when using large size deep groove ball bearings due to the
large cage mass. Please consult NTN Engineering for further
details.
B-5