Maintenance - Surtek CN706A Manual De Usuario

TAPER CUTS
One of the most useful jointer operation is cut-
ting an edge to a taper. The method can be
used on a wide variety of work. Tapered legs
of furniture are a common example. Instead of
laying the piece on the front table, lower the
forward en of the work onto the rear table.
Do this very carefully as the piece will span the
knives, and they will take a "bite" from the
work with tendency to kick back unless the
piece is firmly held. Now push the work for-
ward as in ordinary jointing. The effect is to
plane off all the stock in front of the knives, to
increase depth, leaving a tapered surface.
The ridge left by the knives when starting the
taper may be removed by taking a very light
cut according to the regular method for joint-
ing, with the front table raised to its usual posi-
tion. Practice is required in this operation, and
the beginner is advised to make trial cuts on
waste material.
Taper cuts over part of the length and a num-
ber of other special operations can easily be
done by the experienced craftsman.

MAINTENANCE

CUTTERHEAD MAINTENANCE AND REPAIR
After considerable use, the knives will become
dull and it will not be possible to do accurate
work.
Unless badly damaged by running into metal
or other hard material, they may be sharpened
as follows:
WHETTING KNIVES
1. DISCONNECT THE MACHINE FROM POWER
SOURCE.
2. Use a fine carborundum stone, cover it partly
with paper, as indicated in figure 15, to avoid
marking the table.
Rear
table
Fig.15
3. Lay the stone on the front table, lower the
table and turn the cutterhead forward until
the stone lies flat on the bevel of the knife, as
shown.
20
SANDING STONE, PAR-
TIALLY COVERED WITH
SANDING PAPER
Frontal table
Knives
4. Hold the cutter head from turning, and
whet the bevelled edge of the knife, stroking
lengthwise by sliding the stone back and forth
across the table.
5. Do the same amount to whetting on each at
the three blades.
BLADE CARE
Gum and pitch which collects on the blades
causes excessive friction as the work continues,
resulting in over heating the blades, less effi-
cient cutting, and consequently loss of blade
life, use "Gum and Rust Remover" to wipe this
off the blades.
When these blades become dull enough so
that it is noticeable when cutting, they should
be resharpened. A sharp blade works easier
and results in longer blade life. The penalty
paid for a dull blade is less blade life and great-
er wear and tear on all parts of the machine.
In time rust may appear on the table and fence
and other parts of the jointer resulting in less
efficiency and accuracy of the machine. Use
paste wax which can be applied to prevent
rust formation, of however, rust has already
formed on these parts use "Rust remover"
which will restore the machine to its original
accuracy when applied.
LUBRICATION
We suggest using a good grade of light grease
on the steel adjusting screws for the raising
and lowering mechanisms of the front and rear
work tables. Occasionally apply a few drops of
light machine oil to the gibs on the right side
of each work table so the tables will slide freely
in relation to the base casting. The cutterhead
runs in two single row sealed and shielded ball
bearings, which are pre-lubricated for their en-
tire life.
CUTTERHEAD REPAIRS
When the knives of the cutterhead cannot be
properly sharpened to produce a nice smooth
and clean cut by the methods described above,
they must be ground to a new bevel edge. In
this case, or when the bearings of the cutter-
head need replacement, remove the entire
cutterhead with bea-rings and housing from
the base casting back out the hexagon head
cap screw from each bearing housing which is