System (PMS), described in Military Requirements
You must use a cutting oil when drilling steel or
for Petty Officer Third Class, NAVEDTRA 12044.
wrought iron. Cast iron, aluminum, brass, and other
metals may be drilled dry at high drilling speeds.
PMS is minimum maintenance. If you feel more
However, you should use some medium to cool these
maintenance is required, refer to the technical
metals. This will reduce the chances of overheating the
publication and perform the necessary maintenance.
drill bit and loss of the cutting edge. Compressed air
may be used for cast iron; oleic acid for copper;
sulphurized mineral oil for Monel; and water, lard, or
GAS CYLINDERS AND CYLINDER
soluble oil and soda water for ferrous metals. (Soda
VALVES
water reduces heat, overcomes rust, and improves the
finish.)
You are required to know the standard Navy
After operating a drill press, wipe off all dirt, oil,
system for marking gas cylinders and to be able to
and metal particles. Inspect the V-belt to make sure no
identify the cylinder valves and cylinders of various
metal chips are imbedded in the driving surfaces.
gases. You should be familiar with the construction,
design, and size of these cylinders. You should also
MAINTENANCE OF INSTALLED SHOP
know how to handle and stow gas cylinders in a safe
EQUIPMENT
and proper manner. This section will give you a few
of the important facts about gas cylinders and cylinder
The machines in your shop depend upon you for
valves. Additional information concerning com-
their care and maintenance. To keep your machines
pressed gases can be found in MIL-STD-101, Color
operating properly, you should perform PMS
Codes for Pipelines and for Compressed Gas
routinely. Preventive maintenance should be
Cylinders.
performed according to the Planned Maintenance
Figure 5-65.--Cutaway view of compressed gas cylinders: (A) Oxygen cylinder; (B) acetylene cylinder.
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