Worx WU427.1 Installation manual

CompaCt CirCular saw wu427.1
SAFETY AND OPERATING MANUAL
ORIGINAL INSTRUCTIONS

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COMPONENT LIST
1. Lock Off Button
2. Soft Grip Handle
3. Hex Key
4. On/Off Switch
5. Spindle Lock Button
6. Lower Blade Guard
7. Lower Guard Lever
8. Fixed Upper Guard
9. Dust Extraction Outlet
10. Vacuum Adapter
11. Depth Adjustment Lever
12. Base Plate
Not all the accessories illustrated or described are included in standard delivery.
13. Saw Blade (See Fig. A)
14. Inner Flange (See Fig. A)
15. Blade Bolt (See Fig. A)
16. Parallel Guide
17. Parallel Guide Clamping Fixture
18. Bevel Adjustment Lever
19. Outer Flange (See Fig. A)
20. Laser
21. Laser On-Off Switch
22. Laser Batteries (Two) (See Fig. E2)
23. Blade Alignment Indicator
TECHNICAL DATA
Type WU427.1 (4 - designation of machinery, representative of Saw)
Voltage 230-240V ~ 50Hz
Rated power 710W
No load (rated) speed 3700/min
Blade size TCT blade 120mmx9.5mmx1.2mmx24T
HSS blade 115mmx9.5mmx1.2mmx60T
Diamond disc 115mmx9.5mmx1.6mmx60G
Cutting capacity Cutting Depth at 90° 46mm
Cutting Depth at 45° 30mm
Arbor size 9.5mm
Recommended maximum material thickness Wood 46mm
Aluminum 2.5mm
PVC pipe (diameter) 46mm
Tile 12mm
Sheet steel 0.5mm
Protection class /ll
Bare tool weight 2.3kg
NOISE INFORMATION
A weighted sound pressure LpA: 76dB(A)
A weighted sound power LwA: 87dB(A)
KPA& KWA 3.0dB(A)
Wear ear protection.

8
VIBRATION INFORMATION
Vibration total values (triax vector sum) determined according to EN 60745:
Vibration emission value:
Cutting wood: ah,W = 6.82m/s2
Uncertainty K = 1.5m/s²
Cutting metal: ah,M = 5.63m/s2
Uncertainty K = 1.5m/s²
Warning: The vibration emission value during actual use of the power tool can differ from the
declared value depending on the ways in which the tool is used dependant on the following examples
and other variations on how the tool is used:
How the tool is used and the materials being cut or drilled.
The tool being in good condition and well maintained
The use the correct accessory for the tool and ensuring it is sharp and in good condition.
The tightness of the grip on the handles and if any anti vibration accessories are used.
And the tool is being used as intended by its design and these instructions.
This tool may cause hand-arm vibration syndrome if its use is not adequately managed.
Warning: To be accurate, an estimation of exposure level in the actual conditions of use should also
take account of all parts of the operating cycle such as the times when the tool is switched off and
when it is running idle but not actually doing the job. This may significantly reduce the exposure level
over the total working period.
Helping to minimise your vibration exposure risk.
ALWAYS use sharp chisels, drills and blades
Maintain this tool in accordance with these instructions and keep well lubricated (where appropriate)
If the tool is to be used regularly then invest in anti vibration accessories.
Avoid using tools in temperatures of 10°C or less
Plan your work schedule to spread any high vibration tool use across a number of days.
ACCESSORIES
TCT blade: 24T for wood (WA5076) 1
HSS blade: 60T for thin sheet steel and aluminum, PVC pipe, plastic (WA5077) 1
Diamond disc: 60G for concrete, marble, tile , cement backerboard (WA5078) 1
Parallel guide 1
Vacuum adaptor 1
Hex key 1
We recommend that you purchase your accessories from the same store that sold you the tool. Use
good quality accessories marked with a well-known brand name. Choose the type according to the
work you intend to undertake. Refer to the accessory packaging for further details. Store personnel can
assist you and offer advice.

9
SAFETy INSTRuCTIONS
FOR ALL SAwS
CUTTING PROCEDURES
a) DANGER: Keep hands away from
cutting area and the blade. Keep your
second hand on auxiliary handle, or motor
housing. If both hands are holding the saw,
they cannot be cut by the blade.
b) Do not reach underneath the workpiece.
The guard cannot protect you from the blade
below the workpiece.
c) Adjust the cutting depth to the thickness
of the workpiece. Less than a full tooth of
the blade teeth should be visible below the
workpiece.
d) Never hold piece being cut in your hands
or across your leg. Secure the workpiece to
a stable platform. It is important to support
the work properly to minimize body exposure,
blade binding, or loss of control.
e) Hold power tool by insulated gripping
surfaces when performing an operation
where the cutting tool may contact hidden
wiring or its own cord. Contact with a "live"
wire will also make exposed metal parts of
the power tool "live" and shock the operator.
f) When ripping always use a rip fence or
straight edge guide. This improves the accuracy
of cut and reduces the chance of blade binding.
g) Always use blades with correct size and
shape (diamond versus round) of arbour
holes. Blades that do not match the mounting
hardware of the saw will run eccentrically,
causing loss of control.
h) Never use damaged or incorrect blade
washers or bolt. The blade washers and
bolt were specially designed for your saw, for
optimum performance and safety of operation.
FuRTHER SAFETy
INSTRuCTIONS FOR ALL
SAwS
Kickback causes and related warnings
- Kickback is a sudden reaction to a pinched,
bound or misaligned saw blade, causing an
uncontrolled saw to lift up and out of the
workpiece toward the operator.
- When the blade is pinched or bound tightly
by the kerf closing down, the blade stalls and
the motor reaction drives the unit rapidly back
toward the operator.
- If the blade becomes twisted or misaligned
in the cut, the teeth at the back edge of the
blade can dig into the top surface of the wood
causing the blade to climb out of the kerf and
jump back toward the operator.
Kickback is the result of saw misuse and/or
incorrect operating procedures or conditions and
can be avoided by taking proper precautions as
given below.
a) Maintain a firm grip on the saw and
position your arm to resist kickback
forces. Position your body to either side
of the blade, but not in line with the
blade. Kickback could cause the saw to
jump backwards, but kickback forces can
be controlled by the operator, if proper
precautions are taken.
b) When blade is binding, or when interrupting
a cut for any reason, release the trigger and
hold the saw motionless in the material
until the blade comes to a complete stop.
Never attempt to remove the saw from the
work or pull the saw backward while the
blade is in motion or kickback may occur.
Investigate and take corrective actions to
eliminate the cause of blade binding.
c) When restarting a saw in the workpiece,
center the saw blade in the kerf and check
that saw teeth are not engaged into the
material. If saw blade is binding, it may walk
up or kickback from the workpiece as the saw
is restarted.
d) Support large panels to minimize the risk
of blade pinching and kickback. Large
panels tend to sag under their own weight.
Supports must be placed under the panel on
both sides, near the line of cut and near the
edge of the panel.
e) Do not use dull or damaged blades.
Unsharpened or improperly set blades
produce narrow kerf causing excessive
friction, blade binding and kickback.
f) Blade depth and bevel adjusting locking
levers must be tight and secure before
making cut. If blade adjustment shifts while
cutting, it may cause binding and kickback.
g) Use extra caution when making a “plunge
cut” into existing walls or other blind
areas. The protruding blade may cut objects
that can cause kickback.

10
SAFETy INSTRuCTIONS
FOR SAwS wITH INNER
pENDuLuM guARD
Lower Guard Function
a) Check lower guard for proper closing
before each use. Do not operate the saw
if lower guard does not move freely and
close instantly. Never clamp or tie the
lower guard into the open position. If saw
is accidentally dropped, lower guard may be
bent.Raise the lower guard with the retracting
handle and make sure it moves freely and
does not touch the blade or any other part, in
all angles and depths of cut.
b) Check the operation of the lower guard
spring. If the guard and the spring are not
operating properly, they must be serviced
before use. Lower guard may operate
sluggishly due to damaged parts, gummy
deposits, or a build-up of debris.
c) Lower guard may be retracted manually
only for special cuts such as "plunge cuts"
and "compound cuts." Raise lower guard
by retracting handle and as soon as blade
enters the material, the lower guard must
be released. For all other sawing, the lower
guard should operate automatically.
d) Always observe that the lower guard is
covering the blade before placing saw
down on bench or floor. An unprotected,
coasting blade will cause the saw to walk
backwards, cutting whatever is in its path. Be
aware of the time it takes for the blade to stop
after switch is released.
ADDITIONAL SAFETy
RuLES FOR yOuR
CIRCuLAR SAw
1. Always wear a dust mask, hearing protection
and eye protection.
2. Only use saw blades recommended in the
specification.
3. Do not use any abrasive wheels.
4. Use only blade diameter(s) in accordance with
the markings.
SAFETy INSTRuCTIONS
FOR ABRASIVE
CuTTINg-OFF OpERATIONS
Cut-off machine safety warnings
a) The guard provided with the tool must
be securely attached to the power tool
and positioned for maximum safety, so
the least amount of wheel is exposed
towards the operator. Position yourself
and bystanders away from the plane of the
rotating wheel. The guard helps to protect
operator from broken wheel fragments and
accidental contact with wheel.
b) Use only diamond cut-off wheels for your
power tool. Just because an accessory can
be attached to your power tool, it does not
assure safe operation.
C) The rated speed of the accessory must
be at least equal to the maximum speed
marked on the power tool. Accessories
running faster than their rated speed can
break and fly apart.
d) Wheels must be used only for
recommended applications. For example:
do not grind with the side of cut-off wheel.
Abrasive cut-off wheels are intended for
peripheral grinding, side forces applied to
these wheels may cause them to shatter.
e) Always use undamaged wheel flanges that
are of correct diameter for your selected
wheel. Proper wheel flanges support the
wheel thus reducing the possibility of wheel
breakage.
f) Do not use worn down reinforced wheels
from larger power tools. Wheels intended
for a larger power tool are not suitable for the
higher speed of a smaller tool and may burst.
g) The outside diameter and the thickness of
your accessory must be within the capacity
rating of your power tool. Incorrectly sized
accessories cannot be adequately guarded or
controlled.
h) The arbour size of wheels and flanges
must properly fit the spindle of the power
tool. Wheels and flanges with arbour holes
that do not match the mounting hardware of
the power tool will run out of balance, vibrate
excessively and may cause loss of control.
i) Do not use damaged wheels. Before
each use, inspect the wheels for chips
and cracks. If power tool or wheel is
dropped, inspect for damage or install an

11
undamaged wheel. After inspecting and
installing the wheel, position yourself and
bystanders away from the plane of the
rotating wheel and run the power tool at
maximum no load speed for one minute.
Damaged wheels will normally break apart
during this test time.
j) Wear personal protective equipment.
Depending on application, use face
shield, safety goggles or safety glasses.
As appropriate, wear dust mask, hearing
protectors, gloves and shop apron capable
of stopping small abrasive or workpiece
fragments. The eye protection must be
capable of stopping flying debris generated
by various operations. The dust mask or
respirator must be capable of filtrating
particles generated by your operation.
Prolonged exposure to high intensity noise
may cause hearing loss.
k) Keep bystanders a safe distance away from
work area. Anyone entering the work area
must wear personal protective equipment.
Fragments of workpiece or of a broken
wheel may fly away and cause injury beyond
immediate area of operation.
I) Hold the power tool by insulated gripping
surfaces only, when performing an
operation where the cutting accessory
may contact hidden wiring or its own cord.
Cutting accessory contacting a “live” wire
may make exposed metal parts of the power
tool “live” and could give the operator an
electric shock.
m) Position the cord clear of the spinning
accessory. lf you lose control, the cord may
be cut or snagged and your hand or arm may
be pulled into the spinning wheel.
n) Never lay the power tool down until the
accessory has come to a complete stop.
The spinning wheel may grab the surface and
pull the power tool out of your control.
o) Do not run the power tool while carrying
it at your side. Accidental contact with the
spinning accessory could snag your clothing,
pulling the accessory into your body.
p) Regularly clean the power tool’s air vents.
The motor’s fan will draw the dust inside
the housing and excessive accumulation of
powdered metal may cause electrical hazards.
q) Do not operate the power tool near
flammable materials. Sparks could ignite
these materials.
r) Do not use accessories that require liquid
coolants. Using water or other liquid coolants
may result in electrocution or shock.
FuRTHER SAFETy
INSTRuCTIONS FOR
ABRASIVE CuTTINg-OFF
OpERATIONS
Kickback and related warnings
Kickback is a sudden reaction to a pinched or
snagged rotating wheel. Pinching or snagging
causes rapid stalling of the rotating wheel which
in turn causes the uncontrolled power tool to be
forced in the direction opposite of the wheel’s
rotation at the point of the binding.
For example, if an abrasive wheel is snagged or
pinched by the workpiece, the edge of the wheel
that is entering into the pinch point can dig into
the surface of the material causing the wheel to
climb out or kick out. The wheel may either jump
toward or away from the operator, depending on
direction of the wheel’s movement at the point of
pinching. Abrasive wheels may also break under
these conditions.
Kickback is the result of power tool misuse and/
or incorrect operating procedures or conditions
and can be avoided by taking proper precautions
as given below.
a) Maintain a firm grip on the power tool
and position your body and arm to allow
you to resist kickback forces. Always use
auxiliary handle, if provided, for maximum
control over kickback or torque reaction
during start-up. The operator can control
torque reactions or kickback forces, if proper
precautions are taken.
b) Never place your hand near the rotating
accessory. Accessory may kickback over your
hand.
C) Do not position your body in line with the
rotating wheel. Kickback will propel the tool
in direction opposite to the wheel’s movement
at the point of snagging.
d) Use special care when working Corners,
sharp edges etc. Avoid bouncing and
snagging the accessory. Corners, sharp
edges or bouncing have a tendency to snag
the rotating accessory and cause loss of
control or kickback.
e) Do not attach a saw chain, woodcarving

12
blade, segmented diamond wheel with
a peripheral gap greater than 10 mm or
toothed saw blade. Such blades create
frequent kickback and loss of control.
f) Do not “jam” the wheel or apply excessive
pressure. Do not attempt to make an
excessive depth of cut. Overstressing the
wheel increases the loading and susceptibility
to twisting or binding of the wheel in the
cut and the possibility of kickback or wheel
breakage.
g) When wheel is binding or when
interrupting a cut for any reason, switch
off the power tool and hold the power tool
motionless until the wheel Comes to a
complete stop. Never attempt to remove
the wheel from the cut while the wheel is
in motion otherwise kickback may occur.
lnvestigate and take corrective action to
eliminate the cause of wheel binding.
h) Do not restart the cutting operation in the
workpiece. Let the wheel reach full speed
and carefully re-enter the cut. The wheel
may bind, walk up or kickback if the power
tool is restarted in the workpiece.
i ) Support panels or any oversized workpiece
to minimize the risk of wheel pinching and
kickback. Large workpieces tend to sag under
their own weight. Supports must be placed
under the workpiece near the line of cut and
near the edge of the workpiece on both sides
of the wheel.
j) Use extra caution when making a “pocket
cut” into existing walls or other blind
areas. The protruding wheel may cut gas or
water pipes, electrical wiring or objects that
can cause kickback.
gENERAL SAFETy
wARNINgS FOR yOuR
LASER
Warning: Read all safety warnings and all
instructions. Failure to follow the warnings and
instructions may result in serious injury.
Save all warnings and instructions for future
reference.
These lasers do not normally present an
optical hazard although staring at the beam
may cause flash blindness.
Do not stare directly at the laser beam. A
hazard may exist if you deliberately stare into
the beam, please observe all safety rules as
follows:
1. The laser shall be used and maintained
in accordance with the manufacturer’s
instructions.
2. Never aim the beam at any person or an
object other than the work piece.
3. The laser beam shall not be deliberately
aimed at another person and shall be
prevented from being directed towards
the eye of a person for longer than 0.25
seconds area.
4. Always ensure the laser beam is aimed
at a sturdy work piece without reflective
surfaces, e.g. wood or rough-coated
surfaces are acceptable. Bright shiny
reflective sheet steel or similar is not suitable
for laser applications as the reflective surface
may direct the laser beam back at the
operator.
5. Do not change the laser device with a
different type. The manufacturer or an
authorized agent must carry out repairs.
6. Caution: Use of controls or adjustments other
than those specified herein may result in
hazardous radiation exposure.
ADDITIONAL SAFETY WARNING FOR CLASS
2 LASER
The laser device fitted to this tool is CLASS 2
with a maximum radiation of 1.5mW and 650nm
wavelength.
CLASS 2 LASER RADIATION, DO NOT STARE
INTO BEAM

13
To reduce the risk of injury, user
must read instruction manual
Double insulation
Warning
Wear ear protection
Wear eye protection
Wear dust mask
Do not stare into beam
Laser radiation
This product has been marked with a
symbol relating to removing electric
and electronic waste.This means that
this product shall not be discarded
with household waste but that it shall
be returned to a collection system
which conforms to the European
Directive 2002/96/CE. It will then be
recycled or dismantled in order to
reduce the impact on the environment.
Electric and electronic equipment can
be hazardous for the environment and
for human health since they contain
hazardous substances.
Before any work on the machine
itself, pull the mains plug from the
socket outlet.
SyMBOLS
Wear protective gloves
Wood
Aluminium
Metal
Plastic
Tile
Incorrect
Correct
Lock
Unlock
Diamond disc
HSS blade
TCT blade

14
OpERATINg INSTRuCTIONS
Note: Before using the tool, read the
instruction book carefully.
INTENDED USE:
The tool is intended for ripping and cross-cutting
wood and other materials in straight cutting lines,
while resting firmly on the work piece.
ASSEMBLy AND OpERATION
Action Figure
Saw blade assembly and
removing See Fig. A
Safety on/off switch See Fig. B
Cross and rip cutting See Fig. C1, C2
Using the laser light feature See Fig. D1,D2
Replacing laser batteries See Fig. E1-E3
Parallel guide See Fig. F1, F2
Cutting depth adjusting See Fig. G1,G2
Cutting angle adjusting See Fig. H
Pocket cutting See Fig. I1,I2
Sawdust removal See Fig. J
wORKINg HINTS FOR yOuR
TOOL
If your power tool becomes too hot, please run
your circular saw no load for 2-3 minutes to cool
the motor. Avoid prolonged usage at very low
speeds.
Protect saw blades against impact and shock.
Cutting with extreme force can significantly
reduces the performance capability of the tool
and reduces the service life of the saw blade.
Sawing performance and cutting quality depend
essentially on the condition and the tooth count
of the saw blade. Therefore, use only sharp saw
blades that are suited for the material being cut.
Choice of blades: 24 teeth for general work,
approx. 40 teeth for finer cuts, more than 40
teeth for very fine cuts into delicate surfaces,
diamond for tile, cement board, etc.
Only use saw blades recommended.
MAINTAIN TOOLS wITH
CARE
Remove the plug from the socket before
carrying out any adjustment, servicing or
maintenance.
Keep tools sharp and clean for better and safer
performance. Follow instructions for lubricating
and changing accessories. Inspect tool cords
periodically and if damaged, have repaired
by authorized service facility. Your power tool
requires no additional lubrication or maintenance.
There are no user serviceable parts in your power
tool. Never use water or chemical cleaners to
clean your power tool. Wipe clean with a dry
cloth. Always store your power tool in a dry place.
Keep the motor ventilation slots clean. Keep all
working controls free of dust.
If the supply cord is damaged, it must be
replaced by the manufacturer, its service agent
or similarly qualified persons in order to avoid a
hazard.
Periodically clear dust and chips from guard and
base to ensure proper performance.
ENVIRONMENTAL
pROTECTION
This product has been marked with a
symbol relating to removing electric and
electronic waste. This means that this
product shall not be discarded with household
waste but that it shall be returned to a collection
system which conforms to the European
Directive 2002/96/CE. It will then be recycled or
dismantled in order to reduce the impact on the
environment. Electric and electronic equipment
can be hazardous for the environment and for
human health since they contain hazardous
substances.

15
TROuBLE SHOOTINg
Symptom Possible Causes Possible Solution
Tool will not start when operating
the on/off switch.
Power cord not plugged in.
Power cord is broken.
Carbon brush has worn down
Check to make sure power cord is
connected well into a working outlet.
Unplug the power cord. Replace it
using a qualified maintenance person.
Replace the carbon brush using a
qualified maintenance person.
Cutting depth is less than that
is set.
Sawdust accumulated at the
rear of the base.
Shake out sawdust. Consider
connecting a vacuum for dust
collection.
Blade spins or slips Blade is not tightly engaged
with the spindle.
Remove the blade, and reassemble it
as described in INSTALL/CHANGE
THE BLADE section.
Blade will not cut a straight line.
Blade is dull.
Blade is not mounted properly.
Saw is not being guided
properly.
Mount a new, sharp blade on the saw.
Check that blade is properly mounted.
Use a parallel guide.
Blade kicks back when beginning
a cut
Blade is not spinning fast
enough
Allow the saw blade to reach full
speed prior to beginning a cut in the
material.

16
pLug REpLACEMENT
( uK & IRELAND ONLy )
If you need to replace the fitted plug then follow
the instructions below.
IMPORTANT
The wires in the mains lead are colored in
accordance with the following code:
BLUE =NEUTRAL
Brown = Live
As the colors of the wires in the mains lead
of this appliance may not correspond with the
colored markings identifying the terminals in
your plug, proceed as follows. The wire which is
colored blue must be connected to the terminal
which is marked with N. The wire which is colored
brown must be connected to the terminal which
is marked with L.
WARNING! Never connect live or neutral wires
to the earth terminal of the plug. Only fit an
approved 13ABS1363/A plug and the correct rated
fuse.
NOTE: If a moulded plug is fitted and has to
be removed take great care in disposing of the
plug and severed cable, it must be destroyed to
prevent engaging into a socket.
Connect
Blue to N
(neutral)
Outer sleeve
firmly clamped
Cable grip
Brown L (live)
13 Amp fuse approved
to BS1362
DECLARATION OF
CONFORMITy
We,
Positec Power Tools (Europe) Ltd, PO Box 152,
Leeds, LS10 9DS, UK
Declare that the product,
Description WORX Electric Circular Saw
Type WU427.1 (4-designation of machinery,
representative of Saw)
Function Cutting various materials with a
rotating toothed blade
Complies with the following Directives,
2006/42/EC
2004/108/EC
2011/65/EU
Standards conform to:
EN 55014-1
EN 55014-2
EN 61000-3-2
EN 61000-3-3
EN 60745-1
EN 60745-2-5
EN 60745-2-22
The person authorized to compile the technical
file,
Name: Russell Nicholson
Address: Positec PowerTools (Europe) Ltd, PO
Box 152, Leeds, LS10 9DS, UK
2014/04/23
Leo Yue
POSITEC Quality Manager

Copyright © 2014, Positec. All Rights Reserved.
2PSC17APK11006A0
www.worx.com