Table of Contents
Advertisement
Maintenance
Shaft or Flange Face Runout
Because inspection of flange faces, eccentricity and
shaft runout is rigorously enforced at the factory,
vibrations caused by this alignment problem are rare
and usually if shaft runout, face runout, or eccentricity
are excessive; the equipment has been mistreated in
some way.
The method for checking shaft and flange faces is as
follows:
NOTE
On antifriction bearings, it is recommended that the
test be made with the shaft vertical to minimize the
effect of bearing clearances.
Shaft Runout
The shaft runout is measured with the indicator
stationary with respect to the machine and with its
point at the end of the finished surface of the shaft.
See Figure 13 for typical fixture.
Read the maximum and minimum values on the
indicator as the shaft is rotated slowly through 360
degrees. The difference between the readings shall
not exceed 0.003 inches.
Figure 13 – Shaft Runout Check
Eccentricity
Mounting Surfaces
The eccentricity and face runout of the mounting
surfaces is measured with indicators mounted on the
shaft extension.
indicator shall be at approximately the middle of the
rabbet surface, and the point of the face runout
indicator shall be approximately the outer diameter of
the mounting face. See Figure 14 for typical fixture.
Read the maximum and minimum values on the
indicators as the shaft is rotated slowly through 360
degrees. The difference between the readings shall
not exceed 0.007 inches.
Figure 14 – Eccentricity and Face Runout Check
- 27 -
and
Face
Runout
The point of the eccentricity
of
Advertisement
Table of Contents
