Figure 4-4.--Control panel (DoAIl saw).
5. Pull the "Band Start" button and turn the head
Band Selection and Installation
control to the "saw" position to start the cut.
Adjust coolant, band speed, and feed if
The bands for the continuous feed cutoff saw are
nothing more than an endless hacksaw blade. With
this thought in mind, you can see that all the factors
6. The machine stops automatically at the end of
that were discussed for power hacksaw blade
selection can be applied to this saw. This saw is also
equipped with a job selector (fig. 4-3) to help you
METAL CUTTING BANDSAWS
make the proper selection. The bands come in two
different forms; ready made loops of the proper length
Metal cutting bandsaws are standard equipment in
and coils of continuous lengths of 100 feet or more.
repair ships and shore repair facilities. You can use
You may not change the presized band, but you must
these machines for nonprecision cutting similar to
cut the coils of saw bands to the proper length and
power hacksaws. You can use some types for
then butt-welded the ends. (Butt welding is covered
precision cutting, filing, and polishing. A bandsaw is
later in this chapter.) Once you have selected the saw
more flexible for straight cutting than a power
band, install it following the instructions in your saws
hacksaw in that it can cut objects of any reasonable
size and of regular and irregular shapes.
with a tiltable table. On the type shown, you should
You will control the movement of the saw head
feed the work either manually or by power to the
blade which runs in a fixed position.
to operate the saw follow these steps:
The tiltable band saw is particularly suited to
1. Pull the hydraulic start button (this will
straight and angle cuts on large, long, or heavy pieces.
pressurize both the hydraulic and coolant
The tiltable table is convenient for contour cutting
because you can quickly change the angle at which
2. Adjust the vice for work size and workstop for
you feed work to the blade. This machine usually has
the desired cut-off length. Place it's band
special attachments and accessories to make precision
speed, feed and coolant at approximate
inside or outside cuts of contours and disks and to
miter. It has special bands to file and polish work.
The saw bands, file bands, and polishing bands used
3. Raise the head with the head control joy stick,
on these machines are called BAND TOOLS, and the
then set the control on "hold".
machine itself is often referred to as a BAND TOOL
4. Position the workpiece and clamp the vice.
MACHINE. We have listed some definitions that will