Inspector 400 Applications
Detecting Bearing Failure
Inspector 400 Ultrasonic Probe
2 - 13
User Manual
Detecting Bearing Failure
Comparative Testing - The comparative method
involves testing two or more similar bearings and
“comparing” potential differences.
To perform a Comparative Test:
•
Use contact (stethoscope) module.
•
Select a “test spot” on the bearing housing.
Touch the spot with the contact module.In
ultrasonic sensing, the more mediums or
material's ultrasound has to travel through, the
less accurate the reading. Therefore, be sure
the contact probe is actually touching the
bearing housing. If this is difficult, touch a
grease fitting or touch as close to the bearing as
possible.
•
Approach the bearings at the same angle,
touching the same area on the bearing housing.
•
Reduce sensitivity (if unsure of this procedure,
refer to Sensitivity Selection Dial).
•
Listen to bearing sound through headphones to
hear the “quality” of the signal for proper
interpretation.
•
Select same type bearings under similar load
conditions and same rotational speed.
•
Compare differences of meter reading and
sound quality.
It is important to consider two elements of potential
failure. One is lack of lubrication, the other is over
lubrication.
