18
Fig. 45
Fig. 46
DIRECTION OF GRAIN
Avoid feeding work into the jointer against the grain as
shown in Fig. 47. The result will be chipped and splin-
tered edges. Feed with the grain as shown in Fig. 48, to
obtain a smooth surface.
PLANING SHORT
OR THIN WORK
When planing short or thin pieces, always use push
blocks to minimize all danger to the hands. Fig. 45, illus-
trates using the Delta 37-108 Push Blocks properly.
DO NOT PERFORM PLANING OPERATIONS ON
M ATERIAL SHORTER THAN 10 INCHES, NARROWER
THAN 3/4 INCH, WIDER THAN 6 INCHES, OR LESS
THAN 1/2 INCH THICK (REFER TO FIG. 46).
PLANING WARPED PIECES
If the wood to be planed is dished or warped, take light
cuts until the surface is flat. Avoid forcing such material
down against the table; excessive pressure will spring it
while passing the knives, and it will spring back and
remain curved after the cut is completed.
Fig. 47
Fig. 48
Fig. 49
M A I N T E N A N C E A N D R E PAIRS
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, the knives may be sharpened as follows:
WHETTING KNIVES
DISCONNECT THE MACHINE FROM THE POWER
S O U R C E. Use a fine carborundum stone, cover it partly
with paper as indicated in Fig. 49 to avoid marking the
table. Lay the stone on the infeed table, lower the table
and turn the cutterhead forward until the stone lies flat on
the bevel of the knife as shown. Hold the cutterhead from
turning, and whet the bevelled edge of the knife, stroking
lengthwise by sliding the stone back and forth across the
table. Do the same amount of whetting on each of the
three knives.
