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Cleaning Up A Facing Cut; Facing With Power Feed - OTMT SC4 User Manual And Installation Manual

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Smooth finish after facing
If the surface is rough or grooved, the tool may
be too sharply pointed. The area of the tool in
contact with the workpiece should be smooth
or rounded, not a sharp point. Also, advancing
the tool too rapidly can leave a series of spiral
grooves on the surface, rather than a smooth
face. If necessary, adjust your tool and repeat
the process until you achieve a satisfactory

Cleaning up a Facing Cut

Next a small file is used to clean up the sharp
edge of the face. This is standard practice after
making a facing cut, to remove the hazardous
sharp edge before handling the workpiece.
This step requires a small file, preferably about
4"-6" in length with a flat smooth face. For
safety, the file must have a wooden or plastic
handle over the tang.
Filing the edge after facing
Warning: Never use a file without a handle
designed for that purpose. The tang of the file
could be driven into your palm or wrist causing
serious injury.
Caution: In the following procedure the file will
be used near the rotating chuck. This is a
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standard practice on metal lathes, but requires
your full attention. Until you are experienced in
this operation do not attempt it if there are
visitors in your shop or anything else that could
distract you.
1. Move the carriage towards the tailstock
until the cutting tool is at least 6-8" away
from the end of the workpiece.
2. Press the Start button
3. Grasp the handle of the file in your left
hand and the tip of the file in your right
hand. Both hands are used to ensure good
control of both ends of the file. The left
hand is used on the handle to avoid
reaching over the spinning chuck.
4. Carefully bring the flat edge of the file into
contact with the rotating sharp edge left by
the facing operation. The flat surface of the
file should be at about a 45 angle to the
5. Apply mild pressure for just a few seconds.
As the workpiece rotates, the file will clean
up the edge all the way around. You may
work the file forward as you would in a
normal filing operation to enhance the
cutting action.
6. Carefully withdraw the file from the area of
the chuck and place it in a safe place on
the workbench.
7. Press the Stop button
At this point, the workpiece can safely be
handled. However, it will be used in the
following operations so should be left in the
chuck for now.

Facing with Power Feed

While the workpiece is still set up for a facing
operation, we will next demonstrate the use of
the power cross-feed feature of the SC4. When
the power cross feed lever is engaged, the
cross-slide is moved under power of the
leadscrew towards the center of the workpiece.