DeWalt DW897 Manual De Instrucciones página 5

upto1/8" ( 3mm). Toremove t hepunch, loosen t hehead setscrew
about 4 -5turns (SeeFigure 2 ).Slide theshoe assembly fromthe
head. U nscrew t hepunch from theconnecting rodbushing. Punch
mayberesharpened carefully o na bench grinder witha finegrit
wheel. Becareful thatthepunch d oes notbecome s horter than the
minimum length of2.44inches ( 2-7/16 inches o r61mm). Punches
shorter thanthiswillnotengage t hediesufficiently andmustbe
replaced. Theground f acemust b esquare t othepunch a xis. A fter
grinding, carefully stone theground e dges t oremove b urrs. Donot
round o vercorners.
Figure2 Figure 3
HEAD HEAD CAM
_ SHAFT
Reassembly of Nibbler Head
Screw the punch fully into the connecting rod bushing. Slide the shoe
assembly over the end of the punch and into the head. NOTE:
Lubrication groove in punch face must not be exposed at front of
shoe. Turn the shoe to desired cut orientation. Tighten set screw.
Next, check punch engagement.
Checking Punch Engagement
Since the punch length is now changed, the punch engagement may
have to be adjusted. Check punch engagement by placing a flat
blade screwdriver in the cam shaft slot and turning the shaft. (See
Figure 2) Punch should dip .020" to .04" (.5 to 1.0mm) into the die at
the full down stroke position. Too much punch dip into the die will
result in a loss of capacity (bottom of punch will not clear die enough
on up stroke.)
SHAFT
Punch Engagement Adjustment
If the punch engagement should need adjustment, loosen the set
screw and rotate shoe either clockwise (punch deeper into die) or
counterclockwise (punch out of die). Tighten set screw firmly. Turn
cam shaft with screwdriver in slot to check punch engagement
(moving punch fully down). Repeat as necessary.
CONNECTING SET
ROD BUSHING SCREW PUNCH
--DIE SHOE --
DIE
PUNCH I WEAR
GUIDE SHOE PLATE
Die Replacement
If the die becomes dull, replace it. Replace old die by removing two
screws at the front (Figure 2). Install new die and tighten screws.
Recheck punch engagement and adjust punch depth if necessary.
Wear Plate
This tool is equipped with a wear plate to increase the life of the
shoe (See Figure 3). The wear plate fits between the shoe and the
punch. Anytime the punch, punch guide or die is removed, inspect