DeWalt DW154 Guide D'utilisation page 9

384946/DW154 9/25/00 1:27 PM
Bring cutter lightly to the surface to be cut allowing 25-30
revolutions, bringing up light chip so that cutter has established an
external groove. This will position you properly. Apply steady
pressure through the entire cut. It is more important to keep rpms
up than to apply excessive force, causing cutter to slow motor
down. This will attain better cutting action, better cutter life, and
cleaner holes.
Slug should be expelled on the down stroke. If not, it will be
expelled automatically when motor is returned to the extreme up
position.
Operation (at 120 Volts AC)
Control
Apply sufficient pressure to get good drilling. Do not force unit. If
magnet starts to lift from work plate, decrease pressure slightly and
Page 6
it will reclamp. Drill point pressure may exceed holding power under
one or more of the following conditions:
1. Excessive air gap—1/64"(.4mm) or more.
2. Thin metal (under 1/2"(13mm) even with back up plate depending
upon position and condition of metal surface.)
3. Metal with low magnetic properties.
4. Uneven or rough surface.
5. Low line voltage.
6. Defective unit.
How To Drill & Tap
For accuracy drill a small lead hole before using the final size drill.
Large diameter drills will "walk" off center until drill reaches full
diameter at which point the outside diameter acts as a pilot in the hole
being drilled. This is not peculiar to magnetic drill presses, but is
general machine shop knowledge on any large hole drilling.
Adjustments
1. This unit is designed
with a permanently
lubricated gib and is
adjusted at the factory.
The gib should be tight
enough to retain the
motor in the upward
(retracted) position.
Should this need
adjustment, tighten 3
self-locking set screws,
6
SET
SCREWS
FIGURE 8