WORX WU434 User Manual

SAFETY AND OPERATING MANUAL

ORIGINAL INSTRUCTIONS

CIRCULAR SAW

WU434 WU434 .1

2

General power tool safety
warnings

Warning! Read all safety warnings and all instructions.

Failure to follow the warnings and instructions may result in electric
shock, fire and/or serious injury.

Save all warnings and instructions for future reference.

The term “power tool” in the warnings refers to your mains­operated (corded) power tool or battery-operated (cordless) power
tool.

WORK AREA SAFETY

1

a) Keep work area clean and well lit. Cluttered or dark areas invite
accidents.

b) Do not operate power tools in explosive atmospheres, such
as in the presence of flammable liquids, gases or dust. Power

tools create sparks which may ignite the dust or fumes.

c) Keep children and bystanders away while operating a power
tool. Distractions can cause you to lose control.

ELECTRICAL SAFETY

2

a) Power tool plugs must match the outlet. Never modify the
plug in any way. Do not use any adapter plugs with earthed
(grounded) power tools. Unmodified plugs and matching outlets

will reduce risk of electric shock.

b) Avoid body contact with earthed or grounded surfaces,
such as pipes, radiators, ranges and refrigerators. There is an

increased risk of electric shock if your body is earthed or grounded.

c) Do not expose power tools to rain or wet conditions. Water
entering a power tool will increase the risk of electric shock.

d) Do not abuse the cord. Never use the cord for carrying,
pulling or unplugging the power tool. Keep cord away from
heat, oil, sharp edges or moving parts. Damaged or entangled

cords increase the risk of electric shock.

e) When operating a power tool outdoors, use an extension
cord suitable for outdoor use. Use of a cord suitable for outdoor

use reduces the risk of electric shock.

f) If operating a power tool in a damp location is unavoidable,
use a residual current device (RCD) protected supply. Use of an

RCD reduces the risk of electric shock.

PERSONAL SAFETY

3

a) Stay alert, watch what you are doing and use common
sense when operating a power tool. Do not use a power tool
while you are tired or under the influence of drugs, alcohol or
medication. A moment of inattention while operating power tools

may result in serious personal injury.

b) Use personal protective equipment. Always wear eye
protection. Protective equipment such as dust mask, non-skid

safety shoes, hard hat, or hearing protection used for appropriate
conditions will reduce personal injuries.

c) Prevent unintentional starting. Ensure the switch is in the
off-position before connecting to power source and/or battery
pack, picking up or carrying the tool. Carrying power tools with

your finger on the switch or energising power tools that have the
switch on invites accidents.

d) Remove any adjusting key or wrench before turning the
power tool on. A wrench or a key left attached to a rotating part of

3

the power tool may result in personal injury.

e) Do not overreach. Keep proper footing and balance at all
times. This enables better control of the power tool in unexpected

situations.

f) Dress properly. Do not wear loose clothing or jewellery. Keep
your hair, clothing and gloves away from moving parts. Loose

clothes, jewellery or long hair can be caught in moving parts.

g) If devices are provided for the connection of dust extraction
and collection facilities, ensure these are connected and
properly used. Use of dust collection can reduce dust-related

hazards.

may affect the power tool’s operation. If damaged, have the
power tool repaired before use. Many accidents are caused by

poorly maintained power tools.
f) Keep cutting tools sharp and clean. Properly maintained cutting
tools with sharp cutting edges are less likely to bind and are easier
to control.

g) Use the power tool, accessories and tool bits etc. in
accordance with these instructions, taking into account the
working conditions and the work to be performed. Use of the

power tool for operations different from those intended could result
in a hazardous situation.

4 5

POWER TOOL USE AND CARE
a) Do not force the power tool. Use the correct power tool for
your application. The correct power tool will do the job better and

safer at the rate for which it was designed.

b) Do not use the power tool if the switch does not turn it on
and off. Any power tool that cannot be controlled with the switch is

dangerous and must be repaired.

c) Disconnect the plug from the power source and/or
the battery pack from the power tool before making any
adjustments, changing accessories, or storing power tools. Such

preventive safety measures reduce the risk of starting the power
tool accidentally.

d) Store idle power tools out of the reach of children and do
not allow persons unfamiliar with the power tool or these
instructions to operate the power tool. Power tools are dangerous

in the hands of untrained users.

e) Maintain power tools. Check for misalignment or binding of
moving parts, breakage of parts and any other condition that

SERVICE
a) Have your power tool serviced by a qualified repair person
using only identical replacement parts. This will ensure that the

safety of the power tool is maintained.

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 ALL SAWS
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

4

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 arbor 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
Causes and operator prevention of kickback:

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 with both hands on the saw and
position your arms 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 restar ted.

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

5

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.

SAFETY INSTRUCTIONS FOR PLUNGE- TYPE SAW
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.

6

Symbols

To reduce the risk of injury, user must read instruction
manual

Warning

Wear ear protection

Wear eye protection

Wear dust mask

Double insulation

Waste electrical products should not be disposed of with
household waste. Please recycle where facilities exist.
Check with your Local Authority or retailer for recycling
advice.

7

Component list

1

2

3
4
5

789

10

11

12

13

17

14

15

16

18

19

6

17

14

1516

18

19

A

On/ Off Switch

1

Auxiliary Handle

2

Spindle Lock Button

3

Base Plate Angle Scale

4

Parallel Guide Lock Screw

5

Base Plate Bevel Lock

6

Bevel Trac

7

Parallel Guide

8

Lower Blade Guard

9

Base Plate

10

Lower Guard Lever

11

Vacuum Adaptor

12

Fixed Guard

13

Spindle (See Fig. A)

14

Inner Flange ( See Fig. A)

15

Saw Blade *(See Fig. A)

16

Outer Flange ( See Fig. A)

17

Blade Bolt ( See Fig. A)

18

Wrench (See Fig. A)

19

Depth Of Cut Scale (See Fig. B )

20

Depth Of Cut Lock Lever (See Fig. B)

21

TM

* Not all the accessories illustrated or described are included in
standard delivery.

8

Technical data

Vibration information

Type WU434 WU434.1 (421~459 -designation of machinery,
representative of CIRCULAR SAW)

•

Voltage 220-240V~50/60Hz

•

Power input 1500W

•

No load speed 5000/min

•

Max. cutting capacity 90° 65mm
45° 48mm

•

Bevel capacity 0-56°

•

Blade size 190mm

•

Protection class /II

•

Machine weight 4.3kg

Noise information

•

A weighted sound pressure LpA:94.4dB(A)

•

A weighted sound power LwA:105.4dB(A)

•

K

& KWA 3.0dB(A)

PA

•

Wear ear protection when sound pressure is over 80dB(A)

Vibration total values (triax vector sum) determined according to

•

EN 60745:

Vibration emission value

= 4.15m/s²

•

Typical weighted vibration

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 is cut or drilled.
The tool being in good condition and well maintained
To 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 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.

a

h

Uncertainty K = 1.5m/s²

9

Help to minimize 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 10oC or less.
Plan your work schedule to spread any high vibration tool use across
a number of days.

Accessories

WU434 WU4 34.1

Spanner 1

•

Parallel guide 1

•

•

Vacuum adaptor 1

•

Blade: Ø190mm 24T 1 1 (on machine)

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.

10

Operating instructions

Note: Before using the tool, read the instruction book carefully.

INTENDED USE

The machine is intended for ripping and cross-cutting wood in
straight cutting lines and with bevel angles to 56°, while resting
firmly on the work piece.

CHANGING THE SAW BLADE (See Fig. A)

1

• Before any work on the machine itself, unplug the saw.

• Wear protective gloves when mounting the saw blade.

Danger of injur y when touching the saw blade.

• Only use saw blades that correspond with the characteristic
data given in the operating instructions.

• Do not under any circumstances use grinding discs as the
cutting tool.

For changing the cutting tool, it is best to place the machine on the
face side of the motor housing.

REMOVING

Press the spindle lock button (3 ) and keep it depressed.

• The spindle lock button ( 3) may be actuated only when the saw

blade is at a standstill.
Loosen the blade bolt (18) with the spanner wrench (19). Remove
the outer flange (17). Tilt back the lower blade guard (9 ) and hold it
firmly with the lower guard lever (11). Remove the saw blade (16).

Tilt back the lower blade guard (9 ) and hold it firmly with the lower
guard lever (11). Place the saw blade onto the inner flange (15).
Assemble the outer flange (17) and the blade bolt (18). Use the
wrench (19) to tighten the bolt (18) with 1/4 turn more than finger
tight.

• Take care that the mounting positions of the inner flange
(15) and outer flange (17) are correct.

• When mounting: Ensure that the cutting direction of the
teeth (direction of arrow on saw blade) and the direction-of­rotation arrow on the blade guard match.

MOUNTING

Clean the saw blade and all the clamping parts to be assembled.

11

2

20

21

2

3

7

1

C1B

DC2

4

6

6

4

ADJUSTING THE CUTTING DEPTH (See Fig. B)

To achieve an optimum cut, the saw blade must not protrude the
material by more than 3mm (maximum).
Lift the depth of cut lock lever (21) and raise the saw body away
from the base plate. Adjust the required cutting depth using
the depth of cut scale (20 ). Turn the lock lever (21) in clockwise
direction to lock the set cutting depth.

3

ADJUSTING THE CUTTING ANGLE ( See Fig. C1&C2)

Turn the base plate bevel lock (6 ) in anti-clockwise direction to
loosen the angle scale. Tilt the base plate away from the machine
until the required cutting angle is adjusted on the angle scale (4).
Tighten the bevel lock (6 ) by turning it in clockwise direction.
Note: The 45°degree has a fast and positive stop. You can use this
angle exactly. If you want to use bigger cutting angle, you can push
the bevel lock along the path 2 and tighten the bevel lock.

4

CUTTING GUIDE (See Fig. D)

The Bevel TracTM (7) fixed in front of the base plate is used as
cutting guide. Always guide it along the cutting mark made on the
workpiece for accurate cutting.
The cutting mark 0° indicates the position of the saw blade for
right-angled cuts.
Note: It is best to perform a practice cut prior to starting work.

5

SWITCHING ON AND OFF

Depress the On/Off switch (1) to start the saw and release to stop.

For safety reasons the On/Off switch (1) of the machine
cannot be locked; it must remain pressed during the entire
operation.

12

Working hints for your circular

8

FE

G2G1

saw

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. Excessive feed
significantly reduces the performance capability of the machine
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 to be worked.
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.

PARALLEL GUIDE (See Fig. E)

1

The parallel guide (8) enables exact cuts along a workpiece edge
and cutting strips of the same dimension.

BEVEL CUTS (See Fig. F)

2

Set required bevel angle between 0° and 56°. Do not use the depth
of cut scale when making bevel cuts due to possible inaccuracy.

POCKET CUTTING (SOFT MATERIALS ONLY)

3

(See Fig. G1 AND G2)

This operation requires much skill with a saw and must only be
carried out by a competent person.

Warning: The blade teeth are exposed during this operation

13

so proceed with extreme caution.
Clearly mark the area to be cut. Set the depth of cut on the saw.
Position the saw over the marked area with the front edge of the
base plate resting on the work surface and cutting guide aligned
with marked line on workpiece. Ensure the blade is not touching
but is close to the work surface. The moving lower guard must be
rotated open by using lever. Switch the saw on and gently swing
the blade down into the material but maintain a pivoting force on
the front edge of the base. The moving lower guard can now be
released for normal action of the guard.

Maintenance

Remove the plug from the socket before carrying out any
adjustment, ser vicing or maintenance.

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.

Environmental protection

Waste electrical products must not be disposed of with
household waste. Please recycle where facilities exist.
Check with your local authorities or retailer for recycling

advice.

14

Connect
Blue to N
(neutral)

Outer sleeve
firmly clamped

Cable grip

Brown L (live)

13 Amp fuse approved
to BS1362

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 =NEUTR AL 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.
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.

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.

15

EC DECLARATION OF
CONFORMITY

We,
Positec Power Tools (Europe) Ltd,
PO Box 152, Leeds, LS10 9DS, UK

Declare that the product,
Description WORX Circular saw
Type WU434 WU434.1 (421~459 -designation of machinery,

representative of CIRCULAR SAW)
Function Cutting various materials with a rotating toothed
blade

Complies with the following Directives,

•

EC Machiner y Directive 2006/42/EC

•

EC Electromagnetic Compatibility Directive 2004/108/EC

Standards conform to

EN 55014-1 EN 55014-2 EN 61000-3-2
EN 61000-3-3 EN 60745-1 EN 60745-2-5

The person authorized to compile the technical file,

Name Russell Nicholson
Address Positec Power Tools (Europe) Ltd,
PO Box 152, Leeds, LS10 9DS, UK

2012/07/ 30
Leo Yue
POSITEC Qualit y Manager

2PSC10EPK11002A1

Copyright © 2012, Positec. All Rights Reserved.