DeWalt DW934K2(H) User manual

23
ENGLISH
METAL CUTTING CIRCULAR SAW
DW934K2(H)
Congratulations!
You have chosen a DEWALT tool. Years of experience,
thorough product development and innovation make
DEWALT one of the most reliable partners for
professional power tool users.
Technical data
DW934K2(H)
Voltage V 18
Power output W 315
No-load speed min
-1
3,100
Blade diameter mm 173
Depth of cut mm 61
Blade body thickness mm 1.4
Blade bore mm 20
Weight (without battery pack) kg 3.85
Battery pack DE9095 DE9039
Voltage V 18 18
Capacity Ah 2.0 3.0
Weight kg 1.0 1.0
Charger DE9108 DE9116
Mains voltage V
AC
230 230
Charging time min 60 60
Weight kg 0.4 0.4
Fuses:
Europe 230 V tools 10 Amperes, mains
U.K. & Ireland 230 V tools 13 Amperes, in plugs
The following symbols are used throughout this manual:
Denotes risk of personal injury, loss of life
or damage to the tool in case of
non-observance of the instructions in this
manual.
Denotes risk of electric shock.
EC-Declaration of conformity
DW934K2(H)
DEWALT declares that these Power Tools have been
designed in compliance with: 98/37/EEC,
89/336/EEC, 73/23/EEC, EN 50144, EN 50260,
EN 60335, EN 55014-2, EN 55014-1,
EN 61000-3-2 & EN 61000-3-3.
For more information, please contact DEWALT at the
address below, or refer to the back of the manual.
Level of sound pressure according to 86/188/EEC &
98/37/EEC, measured according to EN 50144:
DW934K2(H)
L
pA
(sound pressure) dB(A)* 86
L
WA
(acoustic power) dB(A) 99
* at the operator’s ear
Take appropriate measures for the
protection of hearing if the sound
pressure of 85 dB(A) is exceeded.
Weighted root mean square acceleration value
according to EN 50144:
DW934K2(H)
25 m/s
2
Director Engineering and Product Development
Horst Großmann
DEWALT, Richard-Klinger-Straße 40,
D-65510, Idstein, Germany

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ENGLISH
Safety instructions
When using Power Tools, always observe the
safety regulations applicable in your country to
reduce the risk of fire, electric shock and personal
injury. Read the following safety instructions
before attempting to operate this product.
Keep these instructions in a safe place!
General
1 Keep work area clean
Cluttered areas and benches can cause accidents.
2 Consider work area environment
Do not expose Power Tools to humidity.
Keep work area well lit. Do not use Power Tools
in the presence of flammable liquids or gases.
3 Guard against electric shock
Prevent body contact with earthed surfaces
(e.g. pipes, radiators, cookers and refrigerators).
For use under extreme conditions (e.g. high
humidity, when metal swarf is being produced,
etc.) electric safety can be improved by inserting
an isolating transformer or a (FI) earth-leakage
circuit-breaker.
4 Keep children away
Do not let children come into contact with the tool
or extension cord. Supervision is required for
those under 16 years of age.
5 Store idle tools
When not in use, Power Tools must be stored in
a dry place and locked up securely, out of reach
of children.
6 Dress properly
Do not wear loose clothing or jewellery. They can
be caught in moving parts. Preferably wear rubber
gloves and non-slip footwear when working
outdoors. Wear protective hair covering to keep
long hair out of the way.
7 Wear safety goggles
Also use a face or dust mask in case the
operations produce dust or flying particles.
8 Beware of maximum sound pressure
Take appropriate measures for the protection of
hearing if the sound pressure of 85 dB(A) is
exceeded.
9 Secure workpiece
Use clamps or a vice to hold the workpiece. It is
safer and it frees both hands to operate the tool.
10 Do not overreach
Keep proper footing and balance at all times.
11 Stay alert
Watch what you are doing. Use common sense.
Do not operate the tool when you are tired.
12 Remove adjusting keys and wrenches
Always check that adjusting keys and wrenches are
removed from the tool before operating the tool.
13 Use appropriate tool
The intended use is described in this instruction
manual. Do not force small tools or attachments
to do the job of a heavy-duty tool. The tool will
do the job better and safer at the rate for which it
was intended.
Warning! The use of any accessory or attachment
or performance of any operation with this tool,
other than those recommended in this instruction
manual may present a risk of personal injury.
14 Maintain tools with care
Keep the tools in good condition and clean for
better and safer performance. Follow the
instructions for maintenance and changing
accessories. Inspect the tool cords at regular
intervals and, if damaged, have them repaired by
an authorized DEWALT repair agent. Keep all
controls dry, clean and free from oil and grease.
15 Check for damaged parts
Before using the tool, carefully check it for
damage to ensure that it will operate properly
and perform its intended function. Check for
misalignment and seizure of moving parts,
breakage of parts and any other conditions that
may affect its operation. Have damaged guards
or other defective parts repaired or replaced as
instructed.
Do not use the tool if the switch is defective.
Have the switch replaced by an authorized
DEWALT repair agent.
16 Remove the battery pack
Remove the battery pack when not in use, before
servicing and when changing accessories.
17 Have your tool repaired by an authorized
DEWALT repair agent
This Power Tool is in accordance with the
relevant safety regulations. To avoid danger,
electric appliances must only be repaired by
qualified technicians.

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Additional safety instructions for battery packs
Fire hazard! Avoid metal short circuiting
the contacts of a detached battery pack.
Do not store or carry the battery pack
without the battery cap placed over the
contacts.
• The battery fluid, a 25-30% solution of potassium
hydroxide, can be harmful. In case of skin contact,
flush immediately with water. Neutralize with a mild
acid such as lemon juice or vinegar. In case of
eye contact, rinse abundantly with clean water
for at least 10 minutes. Consult a physician.
• Never attempt to open a battery pack for any
reason.
Labels on charger and battery pack
In addition to the pictographs used in this manual,
the labels on the charger and the battery pack show
the following pictographs:
100%
Battery charging
100%
Battery charged
Battery defective
Do not probe with conductive objects
Do not charge damaged battery packs
Read instruction manual before use
Use only with DEWALT battery packs,
others may burst, causing personal injury
and damage
Do not expose to water
Have defective cords replaced
immediately
+40 ˚c
+4 ˚c
Charge only between 4 °C and 40 °C
Discard the battery pack with due care
for the environment
Do not incinerate the battery pack
1 h charger
Labels on tool
To be used in metal only
Additional safety rules for circular saws
When sawing
• Always wear regular working gloves while
operating this tool.
• Do not operate the tool while standing in line with
the saw blade. Keep other persons away from
the work area.
• Make sure the saw blade is not contacting the
workpiece before the tool is switched on.
• Be aware of cutting chips and the material being
cut. They may be sharp and hot. Allow cut off
parts to cool before handling.
• Switch off the tool and wait for the saw blade to
stop before moving the workpiece or changing
the settings.
• After switching off, never attempt to stop the saw
blade by pressing against the side of the blade.
• Never put the saw down on a table or workbench
unless switched off.
• Do not attempt to saw extremely small
workpieces.
• Do not cut electrically live material.
• Do not use cutting fluids. These fluids could
ignite, cause electrical shock, or chemically
attack the plastic sight window.
• Use this tool in a well-ventilated area. Do not
operate the tool near flammable liquids, gases or
dust. Sparks or hot chips from cutting or arcing
motor brushes may ignite combustible materials.

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Operational protection devices
• Ensure that all devices screening the saw blade
are in perfect working order.
• Never jam the saw blade guards.
• Free a jammed saw blade guard immediately and
do not use the saw if the guard is jammed.
Guard against kickback
• Kickback occurs when the saw begins to stall
rapidly and is driven back towards the operator.
Release the switch immediately if the blade sticks
or the saw stalls.
• Keep the saw blades sharp.
• Do not remove the saw from the work during a
cut while the saw blade is rotating.
Checking and changing the saw blade
• Use only the saw blades specified in this manual.
Never use abrasive cut-off wheels or other types
of cutting blade.
• Only sharp saw blades in perfect working condition
should be used; cracked or bent saw blades
should be discarded and replaced at once.
• Ensure that the saw blade is securely fixed and
rotates in the correct direction.
Applications
• The circular saw must only be used for ferrous
metal.
• Do not cut non-ferrous metals, stainless steel
and synthetic materials when using the saw
blade supplied with this tool.
• Do not cut concrete, brick, tile or ceramic materials.
• Do not cut cast-iron materials.
• Never cut magnesium materials.
• Do not cut solid materials (e.g. rods) with a body
thickness exceeding 20 mm.
• Do not cut profiles and other shaped materials
(e.g. pipes, boxes) with a wall thickness
exceeding 3 mm.
• When sawing with the workpiece clamped tight,
devices should be used to prevent the workpiece
kicking back.
• When sawing circular sections of metal use a
device to hold the workpiece steady on both
sides of the saw blade to prevent slipping.
• Take care that pieces of metal sawn off the
workpiece cannot be caught up by the teeth of
the saw blade and thrown in the air.
Personal health
•Warning! Use of this tool can generate dust
containing chemicals known to cause cancer,
birth defects or other reproductive harm.
Use appropriate respiratory protection.
Residual risks
The following risks are inherent to the use of these
machines:
- injuries caused by touching the rotating parts
- injuries caused by disruption of the cutting blade
These risks are most evident:
- within the range of operation
- within the range of the rotating machine parts
In spite of the application of the relevant safety
regulations and the implementation of safety
devices, certain residual risks cannot be avoided.
These are:
- Impairment of hearing.
- Risk of accidents caused by the uncovered parts
of the rotating cutting blade.
- Risk of injury when changing the blade.
- Risk of squeezing fingers when opening the guards.
Package contents
The package contains:
1 Metal cutting circular saw
1 Saw blade
1 Allen key
2 Battery packs
1 Battery charger
1 Kitbox
1 Instruction manual
1 Exploded drawing
• Check for damage to the tool, parts or accessories
which may have occurred during transport.
• Take the time to thoroughly read and understand
this manual prior to operation.
Description (fig. A)
Your DEWALT metal cutting circular saw has been
designed for the cutting of variously shaped metal
materials: water and gas pipes, angular iron,
U-profiles, T-bars, rods, bolts, etc.

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Using the appropriate cutting blade, it can cut hot
and cold rolled carbon steel, construction steels
according to DIN 1700 (ST33, ST37-2). This tool is
not intended to be used in non-ferrous metals,
stainless steel, synthetic materials, or cast-iron,
brick, tile or ceramic materials. The tool is never to
be used for cutting magnesium workpieces.
1 On/off switch
2 Lock-off button
3 Front handle
4 Sight window
5 Kerf indicator
6 Lower guard
7 Lower guard retracting lever
8 Saw shoe
9 Depth adjustment knob
10 Battery pack
Charger
Your DEWALT 1 hour charger DE 9108 accepts
DEWALT NiCd battery packs ranging from 7.2 to 18 V.
Your DEWALT 1 hour charger DE 9116 accepts
DEWALT NiMh battery packs ranging from 7.2 to 18 V.
10 Battery pack
11 Release buttons
12 Charger
13 Charging indicator (red)
Electrical safety
The electric motor has been designed for one
voltage only. Always check that the battery pack
voltage corresponds to the voltage on the rating
plate. Also make sure that the voltage of your
charger corresponds to that of your mains.
Your DEWALT charger is double
insulated in accordance with EN 60335.
Mains plug replacement
(U.K. & Ireland only)
• Should your mains plug need replacing and you
are competent to do this, proceed as instructed
below. If you are in doubt, contact an authorized
DEWALT repair agent or a qualified electrician.
• Disconnect the plug from the supply.
• Cut off the plug and dispose of it safely; a plug
with bared copper conductors is dangerous if
engaged in a live socket outlet.
• Only fit 13 Amperes BS1363A approved plugs
fitted with the correctly rated fuse (1).
• The cable wire colours, or a letter, will be marked
at the connection points of most good quality
plugs. Attach the wires to their respective points
in the plug (see below). Brown is for Live (L) (2)
and Blue is for Neutral (N) (4).
• Before replacing the top cover of the mains plug
ensure that the cable restraint (3) is holding the
outer sheath of the cable firmly and that the two
leads are correctly fixed at the terminal screws.
Never use a light socket.
Never connect the live (L) or neutral (N)
wires to the earth pin marked E or .
Using an extension cable
An extension cord should not be used unless
absolutely necessary. Use an approved extension
cable suitable for the power input of your charger
(see technical data). The minimum conductor size is
1 mm2; the maximum length is 30 m.
Assembly and adjustment
• Prior to assembly and adjustment,
always remove the battery pack.
• Always switch off the tool before
inserting or removing the battery pack.
• Use only DEWALT battery packs and
chargers.
Battery pack (fig. A & B)
Charging the battery pack
When charging the battery pack for the first time, or
after prolonged storage, it will only accept an 80%
charge. After several charge and discharge cycles,
the battery pack will attain full capacity.
Always check the mains prior to charging the battery
pack.

28
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If the mains is functioning but the battery pack does
not charge, take your charger to an authorised
DEWALT repair agent. Whilst charging, the charger
and the battery pack may become warm to touch.
This is a normal condition and does not indicate a
problem.
Do not charge the battery pack at
ambient temperatures < 4 °C or > 40 °C.
Recommended charging temperature:
approx. 24 °C.
• To charge the battery pack (10), insert it into the
charger (12) as shown and plug in the charger.
Be sure that the battery pack is fully seated in the
charger. The red charging indicator (13) will blink.
After approx. 1 hour, it will stop blinking and
remain on. The battery pack is now fully charged.
The battery pack can be removed at any time or
left in the connected charger indefinitely.
Inserting and removing the battery pack
• Insert the battery pack into the grip until it clicks
in place.
• To remove the battery pack, press the two
release buttons (11) simultaneously and pull the
pack out of the grip.
Battery cap (fig. B)
A protective cap is supplied to cover the contacts of
a detached battery pack. Without the protective cap
in place, loose metal objects could short circuit the
contacts, causing a fire hazard and damaging the
battery pack.
• Take off the protective cap (14) before placing
the battery pack (10) in the charger or tool.
• Place the protective cap over the contacts
immediately after removing the battery pack from
the charger or tool.
Make sure the protective cap is in place
before storing or carrying a detached
battery pack.
Depth of cut adjustment (fig. A & C)
• Loosen the depth adjustment knob (9).
• Move the shoe (8) to obtain the correct depth of
cut.
• Tighten the depth adjustment knob (9).
For optimal results, allow the saw blade
to protrude from the workpiece by about
3 mm (see inset in figure C).
Replacing the saw blade (fig. D & E)
• Engage the blade lock button (15) and unscrew
the blade camping screw (16) by turning clockwise
using the Allen key supplied with the tool.
• Retract the lower blade guard (6) using the lever (7)
and replace the blade. Reinstall the washers (17)
in the correct position.
• Check the direction of rotation of the blade.
• Thread on the blade clamping screw (16) by hand
to hold the washer in position.
Turn counterclockwise.
• Press the blade lock button (15) while turning the
spindle until the blade stops rotating.
• Tighten the blade clamping screw firmly using the
Allen key.
Instructions for use
• Always observe the safety instructions
and applicable regulations.
• Apply only a gentle pressure to the tool
and do not exert side pressure on the
saw blade.
• Avoid overloading. Should the tool
become hot, let it run a few minutes
under no load condition.
Prior to operation:
• Make sure your battery pack is (fully) charged.
• Make sure the guards have been mounted
correctly. The saw blade guard must be in closed
position.
• Make sure the saw blade rotates in the direction
of the arrow on the blade.
• Do not use excessively worn saw blades.
Switching on and off (fig. A)
For safety reasons the on/off switch (1) is equipped
with a lock-off button (2).
• Press the lock-off button to unlock the tool.
• To run the tool, press the on/off switch (1).
As soon as the on/off switch is released the lock-
off switch is automatically activated to prevent
unintended starting of the machine.