Milwaukee Tool 6021-21 - Manual (Page 4)

6 7
OPERATION
WARNING To reduce the risk of injury,
wear safety goggles or glasses with side
shields.
WARNING To reduce the risk of injury,
always unplug tool before attaching or remov-
ing accessories or making adjustments. Use
only specifi cally recommended accessories.
Others may be hazardous.
WARNING Finish sanding can produce
clouds of fi ne dust that could ignite in the
presence of sparks or open fl ame. Always
wear a suitable dust mask or respirator and
use your sander in a well-ventilated area.
WARNING To reduce the risk of injury,
inspect for and remove all raised nails and
fasteners from workpiece before sanding.
Striking a fastener while sanding could cause
loss of control.
Starting and Stopping the Tool
To start the sander, switch ON/OFF Switch to ON.
To stop sander, switch ON/OFF Switch to OFF.
Variable Speed Switch
The variable speed feature allows the sander to
operate at speeds that can be adjusted by rotat-
ing the dial on the variable speed switch from 1 to
6. The dial is conveniently located on the motor
housing, allowing operator control of disc speed.
To increase sanding disc speed, turn the dial on the
variable speed switch to a higher setting. Turn dial
to a lower setting to decrease sanding disc speed.
• Check the workpiece frequently, random orbit
sanders work more aggressively than simple
orbital sanders.
General Sanding with Random Orbit Sanders
When using random orbit sanders there are a few
things to keep in mind:
• Unlike most sanders, random orbit sanders should
be placed on the workpiece BEFORE the tool is
started. If the sander is started before it is placed
on the workpiece, the free fl oating pad may be
spinning at a speed that can cause scratches when
it is fi nally placed on workpiece.
• Unlike most sanders, random orbit sanders can
be moved across the workpiece in any direction
(in the case of wood, regardless of the direction
of the grain).
• Varying pressure applied to the sander will affect
its rotating speed. A light pressure is recom-
mended for fi ne work, moderate pressure for rough
work. Excessive pressure does not allow the pad
to rotate enough.
• Keep sanding pad fl at on the workpiece. Tipping
the sander or using the edges of the pad may
produce an uneven fi nish, and reduce pad life.
• Keep sander moving in broad even strokes across
the workpiece. Sanding in one spot too long can
cause gouging and uneven results.
WARNING Properly secure workpiece
before sanding. Unsecured work could be
thrown towards the operator causing injury.
WARNING Do not wear loose cloth-
ing or jewelry when operating sander. They
could get caught in moving parts causing
serious injury. Keep head away from sander
and sanding area. Hair could be drawn into
sander causing serious injury.
1. Place sander on the workpiece and turn on
the sander.
2. Keep the sanding disc fl at against the workpiece,
keep the sander moving across the workpiece,
and use long, sweeping strokes.
3. Begin sanding with a coarse grit sandpaper and
gradually use fi ner and fi ner grits of sandpaper
until the desired fi nish is reached. For example
when using the sander on wood, begin with an
80 grit followed by a 120 grit, then a 180 grit and
so on.
Removing Paint or Varnish
1. When removing several layers of paint or var-
nish, remove as much as possible with a paint
solvent or varnish remover.
2. Scrape away the residue with a putty knife or
other scraping tool and allow the surface to cool
and dry before applying sander to the workpiece.
WARNING To reduce the risk of fi re
and explosion, paint solvents and varnish
removers must be removed from the work-
piece and the workpiece must be completely
dry before sanding.
3. Select a coarse grit sandpaper disc to help pre-
vent the sandpaper from clogging.
4. Keep the sander moving over new areas to avoid
heating and softening the old coating (paint or
varnish).
5. Work in wide, overlapping strokes to produce a
uniform fi nish.
6. As the workpiece begins to show through the old
coating, switch to a medium grit sandpaper disc
to avoid scratching the surface of the workpiece.
Gradually switch to a fi ne grit sandpaper until you
achieve the desired fi nish.
Emptying the Dust Bag
For more effi cient operation, empty the dust bag
when it is no more than half full. This will permit
the air to fl ow through the bag better. Always empty
and clean the dust bag thoroughly upon comple-
tion of a sanding operation and before placing the
sander in storage.
WARNING Collected sanding dust
from sanding surface coatings such as polyu-
rethanes, linseed oil, etc. can self-ignite in
the sander dust bag or elsewhere and cause
fi re. To reduce the risk of fi re always empty
the dust bag frequently (10-15 minutes) while
sanding and never store or leave a sander
without totally emptying its dust bag. Also
follow the recommendations of the coatings
manufacturers.
To empty the dust bag:
1. Unplug the sander.
2. Remove the dust bag from the sander.
3. Shake out the dust.
4. Reattach the dust bag to the sander.
Fig. 5
Maintaining Tools
Keep your tool in good repair by adopting a regular
maintenance program. Before use, examine the
general condition of your tool. Inspect guards,
switches, tool cord set and extension cord for
damage. Check for loose screws, misalignment,
binding of moving parts, improper mounting, bro-
ken parts and any other condition that may affect
its safe operation. If abnormal noise or vibration
occurs, turn the tool off immediately and have the
problem corrected before further use. Do not use a
damaged tool. Tag damaged tools “DO NOT USE”
until repaired (see “Repairs”).
Under normal conditions, relubrication is not neces-
sary until the motor brushes need to be replaced.
After six months to one year, depending on use,
return your tool to the nearest MILWAUKEE service
facility for the following:
• Lubrication
• Brush inspection and replacement
• Mechanical inspection and cleaning (gears, spin-
dles, bearings, housing, etc.)
• Electrical inspection (switch, cord, armature, etc.)
• Testing to assure proper mechanical and electrical
operation
WARNING To reduce the risk of injury,
electric shock and damage to the tool, never
immerse your tool in liquid or allow a liquid
to fl ow inside the tool.
MAINTENANCE
WARNING To reduce the risk of injury,
always unplug your tool before performing
any maintenance. Never disassemble the tool
or try to do any rewiring on the tool’s electrical
system. Contact a MILWAUKEE service facility
for ALL repairs.
Cleaning
Clean dust and debris from vents. Keep the tool
handles clean, dry and free of oil or grease. Use
only mild soap and a damp cloth to clean your
tool since certain cleaning agents and solvents
are harmful to plastics and other insulated parts.
Some of these include: gasoline, turpentine, lacquer
thinner, paint thinner, chlorinated cleaning solvents,
ammonia and household detergents containing
ammonia. Never use fl ammable or combustible
solvents around tools.
Repairs
If your tool is damaged, return the entire tool to the
nearest service center.
ACCESSORIES
For a complete listing of accessories refer to your
MILWAUKEE Electric Tool catalog or go on-line
to www.milwaukeetool.com. To obtain a catalog,
contact your local distributor or a service center.
WARNING To reduce the risk of injury,
always unplug the tool before attaching or
removing accessories. Use only specifi cally
recommended accessories. Others may be
hazardous.