Operation - DeWalt D28755 Instruction Manual

FIG. 2
F
G
FIG. 3 FIG, 4
Q
FIG, 5
FIG, 6 METALS OR THIN MATERIAL
MIeTAUX OU MATERIAUX MINCES
METALES O MATERIAL FINO
YES/OUl / Si NO / NON / NO
* Avoid prolonged contact with dust from power sanding, sawing, grinding, drilling,
and other construction activities. Wear protective clothing and wash exposed areas
with soap and water. Allowing dust to get into your mouth, eyes, or lay on the skin may
promote absorption of harmful chemicals.
_, WARNING: Use of this tool can generate and/or disburse dust, which may cause serious
and permanent respiratory or other injury. Always use NIOSH/OSHA approved respiratory pro-
tection appropriate for the dust exposure. Direct particles away from face and body.
_ CAUTION: Wear appropriate personal hearing protection during use. Under some
conditions and duration of use, noise from this product may contribute to hearing loss.
* The label on your tool may include the following symbols. The symbols and their definitions
are as follows:
V ...................... volts
Hz .................... hertz
min .................... minutes
.... .................. direct current
[] .................... Class II Construction
_-_ .................... earthing terminal
A ........................ amperes
W ...................... watts
.................... alternating current
no ...................... no load speed
.../min .............. revolutions per minute
.................... safety alert symbol
SAVE THESE INSTRUCTIONS
COMPONENTS
Refer to Figure 1 for a complete list of components.
ASSEMBLY"
Rotating the Gear Case (Fig. 2, 3)
NOTE: This machine is assembled at the factory with the spindle on right side of the unit for
right handed operation.
CONVERSION FROM RIGHT-HANDED TO LEFT-HANDED
A CAUTION: Turn off and unplug the tool before making any adjustments or removing
or installing attachments or accessories. Be sure the trigger switch is in the OFF
position.
1. Place unit on a firm, flat work surface.
2. Remove bail handle (F) by removing 2 hax bolts (J), the top insulators (K) and the bottom
insulators (L).
3. Remove guard by removing guard mounting nuts (M).
4. Remove the four gear case mounting screws (N).
5. Rotate gear case 180 ° without pulling gear case (O) away from the body of the tool.
NOTE: If the gear case and motor housing become separated by more than 1/8", the tool
must be serviced and re-assembled by a DEWALT service center. Failure to have the tool
serviced may cause brush, motor and bearing failure.
6. Replace the four gear case mounting screws (N) and tighten firmly to 30 in-lb (3.4 Nm).
7. Reattach the guard so the shoe faces in the same direction as the trigger switch handle
(H). Be sure the guard is on the spindle bearing hub as far as it will go and both guard tabs
engage the slot in the spindle bearing hub. Tighten guard mounting nuts (M) securely to
50 in-lb (5.7 Nm).
8. Replace the bail handle with the bottom insulators (L), top insulators (K) and the two hax
bolts (J) then tighten securely to 75 in-lb (8.5 Nm). Refer to Figure 2 for orientation of the
bail handle.
_ WARNING: Plastic insulators must be assembled to hex bolts and bracket as shown in
Figure 3. Failure to do so may result in electric shock injury.
OPERATION
Motor
Be sure your power supply agrees with the nameplate marking. Voltage decrease of more
than 10% will cause loss of power and overheating. All DEWALT tools are factory tested; if
this tool does not operate, check the power supply.
Spindle Lock Button (Fig. 4)
The spindle lock button (P) is used to lock the spindle when changing accessories. To engage
the spindle lock button, disconnect the tool from the power supply and be sure switch is in
OFF position. Depress the spindle lock button and turn the wheel and spindle until the lock but-
ton engages the spindle. Use supplied wrench to unscrew the spindle bolt (Q) and remove or
mount accessories. Spindle threads are right hand.
Installing Abrasive Wheels (Fig. 4, 5)
_ CAUTION: Turn off and unplug the tool before making any adjustments or removing
or installing attachments or accessories. Be sure the trigger switch is in the OFF
position.
1. Lay unit on a firm surface with bottom of shoe (E) facing up.
2. Loosen depth adjustment wing nuts (C), move shoe to allow easiest access to spindle
nut, then tighten wing nuts to hold shoe in place.
3. Using supplied wrench, remove spindle bolt (Q), outer clamp washer (R) and used wheel
(S) if one is installed. Hold spindle from turning with spindle lock button. Spindle threads
are right hand.
4. Slip wheel (S) through bottom of shoe and slip wheel over spindle. Be sure wheel goes
over 1" pilot diameter. Slip on outer clamp washer (R). Be sure outer clamp washer (R)
engages flats on spindle. Thread bolt (Q) into spindle.
5. Engage spindle lock button and tighten spindle bolt (Q) with wrench. Do not over tight-
en spindle bolt.
6. Turn wheel by hand to ensure it is properly centered. The wheel should not hit the shoe
or guard.
7. Be sure to readjust shoe for proper depth of cut. Firmly tighten the depth adjustment wing
nuts (C).
A CAUTION: Only use 14" Type 1 wheels with 1" arbor hole with this tool. Never force a
wheel onto the machine or alter the size of the arbor hole.
FIG. 8
FIG. 7 MASONRY MATERIAL
PRODUIT DE MA_ONNERIE
MATERIAL DE MAMPOSTERiA
NO/NON/NO
YES/OUl / Si
DIRECTION OF CUT
SENS DE COUPE
DIRECCION
DE CORTE
FIG. 9
Depth of Cut (Fig. 6_ 7)
A WARNING: Edge cutting can be performed only with wheels that are designed and
specified for this purpose. Protect yourself during edge cutting by directing the open side
of the guard toward a surface.
_, WARNING: Wheels used for cutting may break or kick back ff they bend or twist while the
tool is being used to do cut-off work.
A WARNING: Do not use edge cutting wheels for surface grinding applications because
these wheels are not designed for side pressures encountered with surface grinding. Wheel
breakage and injury may result.
_, CAUTION: Turn off and unplug the tool before making any adjustments or removing
or installing attachments or accessories. Be sure the trigger switch is in the OFF
position.
The depth of cut can be adjusted by loosening the two depth adjustment wing nuts (C) on the
outside of the guard to change the position of the shoe. Using the slot in the wrench (provided)
securely tighten the wing nuts.
TO CUT METALS AND THIN MATERIALS
When cutting metals and other thin materials, adjust shoe for maximum depth of cut as shown
in Figure 6.
TO CUT STONE OR MASONRY MATERIALS
Set the wheel exposure to about 1/2" (13ram) beyond the shoe. For many applications, the
material will readily break along the 1/2" (13mm) deep scored line. If a deeper cut is needed,
increase the depth of cut in approximately 1/2" (13ram) increments between cuts (Fig. 7).
To Operate (Fig. 2_ 8)
A CAUTION: Before attempting to start, grasp tool firmly with both hands before rifting.
1. Grasp trigger switch handle (H) and bail handle (F) firmly.
2. Line up wheel with material to be cut. Be sure nothing is near or in line with the wheel.
3. Depress trigger lock-off button (I) and subsequently depress and hold trigger switch (A)
then slowly feed wheel into work with firm pressure. Keep the shoe (E) firmly and squarely
against the work. Do not force the tool. For maximum efficiency and wheel life, keep the
wheel speed high.
4. Always cut in the direction of wheel rotation (Fig. 8). If cutting in the opposite direction of
wheel rotation, the tool may climb out of cut and may be difficult to control.
5. To stop tool, release trigger switch (A). Maintain control of tool until blade comes to a
complete stop.
Applications
_, WARNING: NEVER cut magnesium with this tool. Magnesium particles may ignite causing
personal injury.
• 1/8" (3ram) maximum gauge sheet metal
• Concrete, cinder blocks and bricks
• Reinforcing rod; generally under 3/4" (19ram) diameter
• 1/8" (3mm) diameter concrete wire mesh
• Corrugated floor and ceiling form (concrete forms)
• Electrical conduit 1/8" (3mm) wall thickness
• 1/8" (3mm) maximum thick structural forms such as channel, angles, plate, etc.
NOTE: The cutting of materials heavier than those listed above are not recommended due to
the possibility of electrical overloading.
TO ADJUST ANGLE OF GUARD
A CAUTION: Turn off and unplug the tool before making any adjustments or
removing or installing attachments or accessories. Be sure the trigger switch is in
the OFF position.
1. Loosen the guard mounting nuts (M), shown in Figure 2.
2. Grasp the guard firmly and rotate to desired angle.
3. Tighten clamp nuts to lock guard in position.
Installing Dust Duct Attachment (Fig. 9)
NOTE: The dust duct attachment is not included with all models.
,iJ,WARNING: Never use dust duct attachment when cutting metal or material that creates
sparks while cutting.
_, WARNING: Open view port (T) will allow some debris to pass out of cutting area. Always
wear eye protection when using this tool.
A WARNING: Static electricity can be created when using the dust duct. Use of vacuum
increases the potential for static charge build-up. To minimize static charge use only anti-
static, static dissipative or separately grounded vacuum hose.
A CAUTION: Turn off and unplug the tool before instafling or removing the dust duct
attachment. Be sure the trigger is in the OFF position.