ADASH Ltd.
Adash 4400 – VA4Pro
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The Lubri - the greasing control
There is an increasing demand for an instrument which is able to simply check lubrication of rolling bearings and
also the condition of these bearings.
Every machine does have in its specifications how much lubricant every one of its bearings uses in a specific
amount of operational hours. A task of each technician or engineer is to regularly check all the lubricated points
and maintain lubricant at sufficient levels. Either state, lack or excess of lubricant are harmful for a rolling
element bearing. The result is always excessive stress on the bearing and consequently excessive wear. Every
lubricating point has a lubrication time interval (in hours of service) and also an amount of lubricant that needs to
be replenished. This manner of lubrication control has a significant disadvantage.
The amount of lubricant that any bearing actually needs for proper operation changes during its lifetime. Longer
lubricating intervals in the case of a new machine are usually not sufficient for a machine after several years of
operation.
It is clear that it would be useful to be able to determine a state of a bearing somehow and replenish only as
much lubricant as is actually needed. Controlled lubrication increases bearing service life and lowers costs for
lubrication and repairs.
The main use of this Lubri mode is in the lubrication replenishment process. During this process the mode
measures the actual lubrication condition of a bearing and tells the operator when the amount of lubricant is
ideal. This way it is ensured that we do not under or over lubricate.
This mode exactly determines the ideal amount of lubricant needed.
As a result, your machines will be maintained in their best lubrication condition. The Lubri mode enables you to
make the whole lubricating process simpler and it normally reduces the consumption of very expensive
lubricants.
Two Possible Ways How to Measure
A standard accelerometer (sensitivity 100mV/g and ICP power) mounted on a bearing housing is used to
measure lubrication.
You have two possibilities how to do this:
1 The sensor is mounted on a lubrication head.
This option enables a quick service since the lubrication head is transferred together with the sensor. The
disadvantage is a partial loss of sensitivity, since the lubrication head attenuates the measured signal.
2 The sensor is mounted next to lubrication point on a bearing housing (measurement pad recommended).
This option enables a perfect measurement. The disadvantage is a longer preparation, since the lubrication
head and sensor must be mounted separately.
