Sometimes they may be placed as close as 2 inches, while in other cases
a distance of 8 inches is desirable. It depends on the speed of the gear,
the gear size and the spray nozzle in use.
A variety of nozzles are available, with each offering a distinct
spray pattern and requiring a different air pressure. Selecting a spray
pattern is one of the more critical considerations for this application.
While most nozzles do a good job of atomizing the lubricant, you
must make certain that the spray pattern coats the gear surface prior
to the teeth meshing. This may require several nozzles. The entire
width of the gear must be sufficiently covered with lubricant, and
overspray should be minimized.
It is good practice to routinely inspect any spray system for proper
operation. This includes confirming that the nozzles are spraying, there
is adequate air pressure and there is lubricant in the reservoir. The
nozzles tend to clog with debris or wax in some cases. Any clogging of
the nozzles can have adverse effects on the spray pattern and the quality
of lubrication that is occurring on the gear.
Spray lubrication offers a great way to lubricate open gears, but the
same rules apply as with any lubrication practice. The system will only
be as good as it is installed and maintained. Many excellent systems
have failed due to lack of maintenance or inspections. With proper
maintenance, these systems can provide increased reliability and
decrease the manpower required to lubricate the gears manually.
If you have a question for one of Noria's experts, email it to editor@noria.com.