Milwaukee Tool 6021-21 - Manual (Page 3)

4 5
Selecting Sandpaper and Grits
Sandpaper can be made from various grit materi-
als and these should be selected according the
material to be sanded. The guidelines below list
materials and grit materials that should be used
with them.
• Fine woodwork – garnet or aluminum oxide
• Rough woodwork – aluminum zirconia or ceramic
aluminum oxide
• Manufactured wood products (particleboard,
medium density fi ber board etc.) – silicon carbide
or aluminum oxide
• Solid surfacing materials (Corian, etc.) – silicon
carbide or aluminum oxide
• Metals – emery or aluminum oxide
Sandpaper is also graded by coarseness. Start
your work with an abrasive grit just coarse enough
to remove high spots and excessive roughness.
Follow with a second sanding using a grit one or
two grades fi ner. Continue with successively fi ner
grits until you obtain the desired fi nish.
Do not switch from a coarse grit to a very fi ne grit
in one step because it may be diffi cult to remove
the marks made by the coarse grit abrasive. Use
the fi nest grits practical for the roughing operation,
and fi nish by using successively fi ner grits.
Grit Type Typical Application
60
80
Course
Ideal for initial sanding on
rougher surfaces. For fast
stock removal. Rough sand-
ing and stripping of painted
and rusted surfaces.
100
120
Medium
For intermediate sanding and
removal of minor surface im-
perfections.
150
180
220
Fine
Ideal for fi ne sanding prior to
straining, priming, or sealing.
ASSEMBLY
WARNING To reduce the risk of injury,
always unplug tool before changing or re-
moving accessories. Only use accessories
specifi cally recommended for this tool. Others
may be hazardous.
Attaching Hook-and-Loop Sanding Discs
1. Unplug the sander.
2. Align holes in hook-and-loop type sanding disc
with holes in pad, then carefully press fuzzy side
of sanding disc against pad as tightly as possible.
NOTE: Hook-and-loop type sanding discs can
be reused for the life of the sanding abrasive. It
is recommended that you keep the sanding disc
backing pad clean to provide for best adhesion.
Clean occasionally by brushing lightly with a
small brush.
Fig. A
GROUNDING
WARNING Improperly connecting the
grounding wire can result in the risk of elec-
tric shock. Check with a qualifi ed electrician
if you are in doubt as to whether the outlet is
properly grounded. Do not modify the plug
provided with the tool. Never remove the
grounding prong from the plug. Do not use
the tool if the cord or plug is damaged. If
damaged, have it repaired by a MILWAUKEE
service facility before use. If the plug will not
fi t the outlet, have a proper outlet installed by
a qualifi ed electrician.
Grounded Tools: Tools with Three Prong Plugs
Tools marked “Grounding Required” have a three
wire cord and three prong grounding plug. The
plug must be connected to a properly grounded
outlet (See Figure A). If the tool should electrically
malfunction or break down, grounding provides a
low resistance path to carry electricity away from
the user, reducing the risk of electric shock.
The grounding prong in the plug is connected
through the green wire inside the cord to the
grounding system in the tool. The green wire in the
cord must be the only wire connected to the tool's
grounding system and must never be attached to
an electrically “live” terminal.
Your tool must be plugged into an appropri-
ate outlet, properly installed and
grounded in accordance with all
codes and ordinances. The plug
and outlet should look like those
in Figure A.
Double Insulated Tools:
Tools with Two Prong Plugs
Tools marked “Double Insulated” do not require
grounding. They have a special double insula-
tion system which satisfi es OSHA requirements
and complies with the applicable standards of
Underwriters Laboratories, Inc.,
the Canadian Standard Asso-
ciation and the National Elec-
trical Code. Double Insulated
tools may be used in either of
the 120 volt outlets shown in
Figures B and C.
Fig. B Fig. C
Fig. 1
Changing the Sanding
Pad
The sander comes as-
sembled with the hook-
and-loop pad. To attach
the pressure sensitive
adhesive (PSA) pad, you
must first remove the
hook-and-loop pad.
Inspect sanding disc be-
fore installing. Do not use
if broken or defective.
1. Unplug the sander.
2. R e m o v e t h e f o u r
screws that hold the
hook-and-loop pad in
place.
3. Remove the hook-and-
loop pad.
4. Clean dust particles
from the pad brake.
5. Apply a thin layer of
lightweight grease to
the back of the pad.
6. Align the holes in the
pressure sensitive ad-
hesive (PSA) pad with
the four screw holes in
the sander.
7. R e p l a c e t h e f o u r
screws securely.
Attaching PSA Sanding Discs
1. Unplug the sander.
2. Carefully peel paper backing from the pressure
sensitive adhesive type sanding disc.
3. Align holes in sanding disc with holes in back-
ing pad, then carefully press sticky side of disc
against pad as tightly as possible.
NOTE: Holes in sanding disc must line up with
holes in the backing pad in order for the dustless
feature of the sander to function properly.
NOTE: It is recommended that you clean backing
pad occasionally by brushing lightly with a small
brush. Dust buildup on backing pad could cause
sanding disc not to stick properly.
Fig. 2
Remove PSA Sanding Disc Before Storage
Do not store the sander with the sanding disc in-
stalled. Heat generated from sanding causes the
pressure sensitive adhesive to fl ow and form a tight
bond between the backing pad and sanding disc.
Removing the sanding disc soon after you have
fi nished a sanding operation avoids letting the
adhesive set up. If the sanding disc is left on the
backing pad for an extended period of time after
use, the adhesive will set up and cause the sanding
disc to become diffi cult to remove.
It may also tear when removing. When this situation
occurs, it becomes diffi cult to clean the backing pad
for the next sanding disc.
NOTE: If you forget to remove the sanding disc
after a sanding operation, sand for a few minutes
to soften the adhesive backing before attempting
to remove sanding disc.
Fig. 3
Fig. 4
Attaching the Sander to a Vacuum
You can easily attach the dust collection system of
the sander to a vacuum.
1. Unplug the sander.
2. Remove the dust bag from the sander.
3. Attach vacuum hose to blower exhaust.
NOTE: Smaller vacuum hoses fi t inside blower
exhaust. Larger vacuum hoses fi t outside blower
exhaust.
4. Connect sander and vacuum to power supply.
Attaching The Dust Bag
The dust bag provides a dust collection system for
the sander. Sanding dust is drawn up through the
holes of the sanding disc and collected in the dust
bag during sanding. To attach the dust bag:
1. Unplug the sander.
2. Line up the “unlock” symbol on the dust bag with
the arrow on the dust collection port and slide
the bag assembly onto the port. To lock in place,
rotate the bag until the arrow on the port aligns
with the “lock” symbol on the bag.
WARNING When sander is not con-
nected to vacuum, always reinstall dust bag
assembly back onto sander. Fail ure to do so
could cause sanding dust or foreign objects to
be thrown into your face or eyes which could
result in possible serious injury.