Milwaukee Tool 6066-6 - Manual (Page 5)

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OPERATION
Starting and Stopping the Motor
1. To start the tool, pull the trigger.
2. To stop the tool, release the trigger.
Locking the Trigger (Select Models)
The lock button holds the trigger in the ON position
for continuous use.
1. To lock the trigger on, hold in the lock-on button
while pulling the trigger. Release the trigger.
2. To unlock the trigger, pull the trigger and release.
The lock-on button will pop out.
Using the Dial Speed Control (Cat. No. 6078 only)
Cat. No. 6078 has a dial speed control and variable
speed trigger switch. The maximum speed may be
preset using the speed control dial and the speed
may be varied by the trigger switch. Speed control
dial settings range from 1 to 5. Lower numbers
correspond to lower speeds and higher numbers
WARNING To reduce the risk of injury,
wear safety goggles or glasses with side
shields. Unplug the tool before changing
accessories or making adjustments.
WARNING To reduce the risk of injury
or damage to the tool, do not use the spindle
lock button to stop the spindle while the tool
is in use or is coasting after shut-off. Use sanding discs and grinding wheels that are:
• correct size as written on tool's nameplate
• correct wheel type and grit for the job
•rated at or above the RPM listed in the “WARN-
ING” section on the tool's nameplate
Use backing pads, adapters, and other accessories
that are:
• correct size for tool and for sanding disc or grinding
wheel
•rated at or above the RPM listed in the “WARNING”
section on the tool's nameplate
•the proper accessory for the job
Sanding Disc and Grinding Wheel Material
Sanding discs and grinding wheels are made of
various materials and are designed for different
jobs. Be sure that you choose the proper sanding
disc or grinding wheel for the job you plan to do.
correspond to higher speeds. Use the setting that
best suits the work.
To control the speed, set the dial to the desired
number. Then, pull the trigger. Increase or decrease
pressure on the trigger to vary the speed. To stop
the tool, release the trigger.
Sanding Disc and Grinding Wheel Selection
WARNING To reduce the risk of personal
injury and damage to the tool, use ONLY acces-
sories rated at or above the RPM listed on the
“WARNING” section of the tool's nameplate.
USING SANDING DISCS
Installing Sanding Discs
1. Unplug tool and place it upside down on a level surface
as shown. Remove any accessories from spindle.
2. Thread fl ange and nylon washer onto spindle.
Attach backing pad and sanding disc using
Fig. 2 to determine type and order of assembly.
NOTE: When installing fl ap disc without hub,
position fl ap disc nut as shown.
3. To tighten, press in the spindle lock button while
turning disc nut clockwise.
4. To remove sanding disc and backing pad, unplug
tool and reverse procedure.
Fig. 2
Backing
pads
A. Polypropylene
B. Spiral
C. Rubber
D. Phenolic
Disc nut
Sanding
disc
B C D A
Rubber
pad Type 27
fl ange
Flap disk
without hub Flap disk
with hub
Flap disc
nut position
Spindle
Nylon washer
Spindle lock button
Flange
Removing Welds or Hammer Marks
When removing welds or hammer marks, limit
coarse sanding to the immediate area. Use suc-
cessively fi ner grits to smooth surface.
Cross Sanding
When finishing a surface that has been pre-
pared by a coarse disc or wheel, sand at right
angles to the strokes made by the coarser disc.
Finishing marks left from previous sanding are eas-
ily seen and removed for a uniform fi nish. Failure
to cross sand when changing from a coarse disc to
a fi nishing disc may result in deep scratches and
circular marks.
3. Use long, sweeping, side to side strokes, advanc-
ing forward to produce the desired fi nish.
Sanding
1. Use a clamp, vise or other practical means to
hold your work, freeing both hands to control your
tool. Firmly grasp rear handle and side handle
before starting and while tool is in operation.
Allow sanding disc to come to full speed before
beginning to sand.
2. Hold tool at 5° to 15° angle as shown to ensure
proper sanding pressure and control (Fig. 3). Too
great an angle will result in too much pressure
and could cause excessive wear to the disc and
workpiece. Too small an angle will reduce control.
Fig. 3
Hold at a
5° to 15°
angle
For best results, use only
this portion of the disc.
Finishing Metal
Constantly move across the surface. Work faster on
curved surfaces where contact areas are smaller
and pressure is greater. Flat areas may appear at
the end of the stroke when pressure is too heavy.
Ease up on pressure at end of each stroke and
when reversing strokes.
Troubleshooting
Deep scratches and circular marks can result from:
• Using too coarse a grit
• Using a partially glazed disc
• Dirt or loose metal on the workpiece
• Failure to sand across the grain when changing
from coarse to fi nishing discs
Bluish discoloration of metal surface indicates:
• Excessive heat caused by circular motion in a
small area
• Excessive pressure
• Use of worn out or glazed discs
Selecting Sanding Discs & Grit
Refer to the table below to select the correct type
of sanding disc for your job. Generally, use 16, 24
or 36 grit for heavy stock removal; 50, 60 or 80 grit
for medium stock removal and 120 grit for fi nishing.
Always begin with a coarse grit, using successively
fi ner grits to obtain the desired fi nish. See Catalog
for a complete list of MILWAUKEE sanding discs.
Aluminum Oxide
For fast cutting, general purpose discs for most
metal jobs. Best for cold-rolled steel, stainless
steel or metals requiring tough, fast cutting, long
lasting abrasives.
Aluminum Zirconia Bi-Cut
Unique grit pattern is arranged in clusters for
faster stock removal and cleaning. Ideal for
removing paint from cars, boats, etc. without
clogging.
Ceramic
Lasts up to 3 times longer than aluminum ox-
ide discs. For general metal working. Ideal for
tough jobs.