BANDSAW OPERATIONS - OD1646 - LESSON 1/TASK 1
after the cut is established.
Also, hard materials require lighter feeds
than softer materials. It is generally true that wider bandsaw blades will
withstand greater pressures than narrow blades and can therefore be used
with heavier feeds.
When hard spots in the material being cut are
encountered, the feed should be reduced until the spots are cut through. A
light feed should be used when cutting curves; a heavier feed can be used
for straight line cutting.
(9) Coolants. Most sawing machines used in military operations are dry-
cutting machines; that is, they are not intended for use with liquid
coolants. These bandsaw machines contain air pumps and hoses through which
a jet of air is directed against the bandsaw blade and workpiece. The air
acts as both a coolant and as a means of removing chips from the cutting
area. The nozzle of the air hose should always be directed at the contact
area of the blade and workpiece. The model 2614-1 bandsaw machine uses a
mist coolant, designed to direct a fine mist stream of liquid coolant on the
blade teeth and workpiece.
(10) Safety Precautions. When using or servicing the bandsaw machine, it
is important to make safety a habit. Be sure to close the doors and replace
all covers and safety guards before operating the machine.
Wear safety
glasses and wear gloves when handling the saw band. DO NOT, however, wear
gloves when operating the machine. Set the saw guides as close to the work
as possible.
Close the band wheel cover before tensioning the band or
starting the machine.
Disconnect the electrical supply before removing
panels or drive covers. Keep hands away from the moving saw band or blade.
Before working on the machine, always check for these and other safety
precautions in the technical manual (TM) appropriate to the bandsaw machine
being operated or serviced.
b. External Sawing.
External sawing is the process of using the
bandsaw machine to make saw cuts that begin at the outer edge of the
workpiece. These cuts may be straight-line, curved, or contoured.
(1) Straight-Line Sawing. In a typical example of straight-line sawing,
a bandsaw blade of the desired pitch for the material to be cut is
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