Worx WU159, WU166, WU166.9, WU170 Safety And Operating Manual Original Instructions

SAFETY AND OPERATING MANUAL

CORDLESS DRILL WU159 WU166 WU166.9 WU170

ORIGINAL INSTRUCTIONS

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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 mains-operated
(corded) power tool or battery-operated (cordless) power tool.

WORK AREA SAFETY
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
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
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 safety equipment. Always wear eye protection. Safety
equipment such as dust mask, non-skid safety shoes, hard hat, or
hearing protection used for appropriate conditions will reduce personal
injuries.

c) Avoid accidental starting. Ensure the switch is in the off­position before plugging in. Carrying power tools with your finger on

the switch or plugging in 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 the power

tool may result in personal injury.

e) Do not overreach. Keep proper footing and balance at all times.

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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 these devices can reduce dust-related hazards.

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
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.

BATTERY TOOL USE AND CARE
a) Ensure the switch is in the off position before inserting battery
pack. Inserting the battery pack into power tools that have the switch

on invites accidents.

b) Recharge only with the charger specified by the manufacturer.

A charger that is suitable for one type of battery pack may create a risk
of fire when used with another battery pack.

c) Use power tools only with specifically designated battery
packs. Use of any other battery packs may create a risk of injury and

fire.

d) When battery pack is not in use, keep it away from other metal
objects like paper clips, coins, keys, nails, screws or other small
metal objects, that can make a connection from one terminal to
another. Shorting the battery terminals together may cause burns or

a fire.

e) Under abusive conditions, liquid may be ejected from the
battery; avoid contact. If contact accidentally occurs, flush with
water. If liquid contacts eyes, additionally seek medical help.

Liquid ejected from the battery may cause irritation or burns.

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.

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Additional safety rules for your
cordless drill

Remove the battery pack from the drill before carrying out
adjustments.
Do not expose to rain or water.
Do not store the battery pack in temperatures over 40oC.
Always charge the battery pack between temperatures 0oC to 45oC.
Ideal charging temperature is 18oC to 24oC.
Only use the charger and the battery pack provided no others.
Avoid short circuit of the battery pack connections (screws & nails).
Do not incinerate or burn the battery pack, it may explode.
Do not charge a damaged battery pack.
Replace any damaged supply cords on your charger.
Always disconnect the charger power supply before making or
breaking the connections to the battery pack.
Battery pack and charger will be warm during charging this is normal.
When not in use, remove a charged battery pack from the charger.
Always remove the battery pack from the charger immediately after
re-charging is completed.
Your drill and battery pack will be warm when working, this is normal.
Do not dispose of batteries in fire, or with household waste. Return
exhausted batteries to your local collection or recycling point.
Always check walls, floors and ceilings for hidden power cables and
pipes.
Wear ear protection with cordless drill. Exposure to noise can cause
hearing loss.
Accessories and metal parts can become very hot.
Hold tool by insulated gripping surfaces when performing an

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operation where the cutting tool may contact hidden wiring. Contact
with a ‘live’ wire will also make exposed metal parts of the tool ‘live’
and shock the operator.

Warning: If a small amount of electrolyte should leak from
the battery pack under extremes of temperature or after heav y
use, then wash off immediately from your skin and hands using
clean water. For eye contact, rinse thoroughly with clean water and

seek medical treatment immediately.

Safety instructions for battery pack

Do not dismantle, open or shred secondar y cells or battery pack.
Do not expose cells or battery pack to heat or fire. Avoid storage in
direct sunlight.
Do not short-circuit a cell or a battery pack. Do not store cells or
battery pack haphazardly in a box or drawer where they may short­circuit each other or be short-circuited by other metal objects.
Do not remove a cell or battery from its original battery pack
enclosure required for use.
Do not subject cells or battery pack to mechanical shock.
In the event of a cell leaking, do not allow the liquid to come in
contact with the skin or eyes. If contact has been made, wash the
affected area with copious amounts of water and seek medical
advice.
Do not use any charger other than that specifically provided for use
with the equipment.
Observe the plus (+) and minus ( – ) marks on the cell, battery and
equipment and ensure correct use.
Do not use any cell or battery pack which is not designed for use with
the equipment.

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

Warning

Wear ear protection

Wear eye protection

Wear dust mask

Indoor use only

Do not expose to rain or water

Do not burn

Do not dispose of batteries. Return exhausted batteries to your
local collection or recycling point

Do not mix cells of different manufacture, capacity, size or type within
a device.
Keep cells and battery pack out of the reach of children.
Seek medical advice immediately if a cell or a battery pack has been
swallowed.
Always purchase the correct cell or battery for the equipment.
Keep cells and battery pack clean and dry.
Wipe the cell or batter y pack terminals with a clean dry cloth if they
become dirty.
Secondary cells and batter y pack need to be charged before use.
Always use the correct charger and refer to the manufacturer’s
instructions or equipment manual for proper charging instructions.
Do not leave a battery pack on prolonged charge when not in use.
After extended periods of storage, it may be necessary to charge and
discharge the cells or battery pack several times to obtain maximum
performance.
Secondary cells and batter y pack give their best performance when
they are operated at normal room temperature (20°C ± 5°C ).
Retain the original product literature for future reference.
Use only the cell or battery pack in the application for which it was
intended.
When possible, remove the battery pack from the equipment when
not in use.
Dispose of properly.

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Component list

Chuck
Torque Adjustment Ring
Two-Speed Gear Control
Forward/Reverse Rotation Control
Soft Grip Handle
Battery Pack Release Button
Battery Pack *
Double Ended Bit *
On/Off Switch
Led Light

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

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Technical data

Type WU159 WU166 WU166.9 WU170(1- designation of machinery,
representative of cordless dril)

Noise / vibration information

A weighted sound pressure LpA: 80dB(A)
A weighted sound power LwA: 91d B ( A )
KpA & KwA 3dB(A)
Wear ear protection when sound pressure is over 80dB(A)

Drilling into metal 1.56m/s2

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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 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.
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 100C or less.
Plan your work schedule to spread any high vibration tool use across a
number of days.

Model No. WU159

WU166

WU166.9

WU170

Voltage 14.4V

18V 18V

No load speed 0-400 / 0-1300/min

Number of clutch
positions

21+1

Max torque 35N.m 55N.m 55N.m

Chuck capacity 13mm

Max. drilling
capacity

Steel 13mm 13mm 13mm

Wood 35mm 38mm 38mm

Machine weight 2.0kg 2.2kg 1.9kg

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Accessories

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 under take. Refer to the accessory packaging for
further details. Store personnel can assist you and offer advice.

Model
No.

WU159 WU166 WU166.9 WU170

Charger
voltage

110-240V~50/60Hz -

220V-240V

~50/60Hz

Battery
type

WA3514

2.6Ah Li-ion

WA3522

2.6Ah Li-ion

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WA3511

1.3Ah Li-ion

Battery
quantity

2 2 - 2

Charger
type

WA3836 WA3836 - WA3842

Charger
quantity

1 1 - 1

Charging
time

45min 45min - 30min

Double
ended bit

1 1 1 1

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Operating instructions

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

INTENDED USE

The machine is intended for driving in and loosening screws as well
as for drilling in wood, metal, ceramic and plastic.

BEFORE PUTTING INTO OPERATION

• BATTERY CHARGING

The battery charger supplied is matched to the Li-ion battery installed
in the machine. Do not use another battery charger.
The Li-ion battery is protected against deep discharging. When
the battery is empty, the machine is switched off by means of a
protective circuit: The chuck no longer rotates.
In a warm environment or after heav y use, the battery pack may
become too hot to permit charging. Allow time for the battery to cool
down before recharging.
When the battery is charged for the first time and after prolonged
storage, the battery will only accept approximately 60% charge.
However, after several charge and discharge cycles the battery will
accept a 100% charge.

• TO REMOVE OR INSTALL BATTERY PACK (See Fig.A)

Depress the battery pack release button to release and slide the
battery pack out from your tool. After recharge, slide it back into your
tool. A simple push and slight pressure will be sufficient.

ON/OFF SWITCH (See Fig.B)

Depress the On/ Off switch to start and release it to stop your drill.

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The on/off switch is fitted with a brake function which stops your
chuck immediately when you quickly release the switch.
It is also a variable speed switch that delivers higher speed and
torque with increased trigger pressure. Speed is controlled by the
amount of switch trigger depression.

Warning: Do not operate for long periods at low speed

because excess heat will be produced internally.

SWITCH LOCK (See Fig.B)

The switch trigger can be locked in the OFF position. This helps to
reduce the possibility of accidental starting when not in use. To lock
the switch trigger, place the rotation control in the center position.

REVERSIBLE (See Fig.B)

For drilling and screw driving use forward rotation marked “ ”
(lever is moved to the left). Only use reverse rotation marked “ ”
(lever is moved to the right) to remove screws or release a jammed
drill bit.

Warning: Never change the direction of rotation when the

chuck is rotating, wait until it has stopped!

TWO-SPEED GEAR CONTROL (See Fig.C)

The drill has a two-speed gear control designed for drilling or driving
at LOW (mark is 1) or HIGH (mark is 2) speeds. A slide switch is
located on top of the drill to select either LOW or HIGH speed. When
using the drill in the LOW speed range, the speed will decrease and
the drill will have greater power and torque. When using the drill in
the HIGH speed range, the speed will increase and the drill will have
less power and torque.

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Gear I

Low speed range: for screwdriving or working with large drilling
diameter

Gear II

High speed range: for working with small drilling diameter

Warning: To prevent gear damage, always allow the chuck
to come to a complete stop before changing the direction of
rotation or the two-speed gear control.

CHUCK ADJUSTMENT

To open the chuck jaws rotate the front section of the chuck. Insert
the drill bit between the chuck jaws and rotate the front section in
the opposite direction. Ensure the drill bit is in the center of the chuck
jaws. Finally, firmly rotate the front chuck section in the opposite
directions. Your drill bit is now clamped in the chuck.

TORQUE ADJUSTMENT (See Fig.D)

(Screw driving force of your drill driver)
The torque is adjusted by rotating the torque adjustment ring. The
torque is greater when the torque adjustment ring is set on a higher
setting. The torque is less when the torque adjustment ring is set on
a lower setting.
When drilling in wood, metal, plastic and screwdriver choose the drill
position .
Make the setting as follows:

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1 - 4 for driving small screws

5 - 8 for driving screws into soft material

9 - 12 for driving screws into soft and hard material

13 - 16 for driving screws into hard wood

17 - 21 for driving larger screws

for heavy drilling

LED LIGHT (10)

The LED light allows you to keep a clear view under less illuminated
circumstances. To turn on the light simply press the on /off switch.
When you release the on/off switch, the light will be off.

AUTOMATIC SPINDLE LOCK (See Fig.E)

The automatic spindle lock allows you to use the drill as a regular
screwdriver. You can give an extra twist to firmly tighten a screw,
loosen a very tight screw or continue working when the battery
energy has expired. For manual screwdriver purposes, the chuck is
automatically locked when the tool is off.

DRILLING

When drilling into a hard smooth surface, use a center punch to mark
the desired hole location. This will prevent the drill bit from slipping
off center as the hole is started. Hold the tool firmly and place the tip
of the bit at the point to be drilled. Depress the switch trigger to start
the tool. Move the drill bit into the workpiece, applying only enough
pressure to keep the bit cutting. Do not force or apply side pressure
to elongate a hole.

Tungsten carbide drill bits should always be used for

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screws into hard wood will use up the battery pack energy faster than
lighter working conditions. Do not re-charge your battery pack below
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C and above 45oC as this will affect performance.

Maintenance

Remove the battery pack from the tool before carrying out any
adjustment, servicing 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.
Occasionally you may see sparks through the ventilation slots. This is
normal and will not damage your power tool.

Environmental protection

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

concrete and masonry. When drilling in metal, only use HSS
drill bits in good condition. Always use a magnetic bit holder
(not included) when using short screwdriver bits. When screw­driving, apply a small quantity of liquid soap or similar to the
screw threads to ease insertion.

Problem solution

1. WHY DOES THE DRILL NOT TURN ON WHEN YOU PRESS
THE SWITCH?

The forward/reverse rotation control, which is on top of the trigger, is
positioned in the lock function. Unlock the forward/reverse rotation
control by putting it into the required rotation position. Push the
trigger and the drill will start to rotate.

2. THE DRILL STOPS BEFORE THE SCREW IS COMPLETELY
TIGHTENED. WHY?

Verify the torque position of the torque adjusting ring, you can find the
torque- adjusting ring between the chuck and the drill body. Position
1 is the lowest torque ( screw driving force) and position 21 is the
highest torque ( screw driving force). Position 22 is for drill operation.
Regulate the torque adjusting ring to a higher position to reach the
best result.

3. REASONS FOR DIFFERENT BATTERY PACK WORKING TIMES

Charging time problems, having not used a battery pack for a
prolonged time will reduce the battery pack working time. This can be
corrected after several charge and discharge operations by charging
& working with your drill. Heavy working conditions such as large

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Disposal of an exhausted
battery pack

To preserve natural resources, please recycle or dispose of
the battery pack properly. This battery pack contains Lithium

batteries. Consult your local waste authority for information
regarding available recycling and/or disposal options. Discharge
your battery pack by operating your drill, then remove the battery
pack from the drill housing and cover the battery pack connections
with heavy-duty adhesive tape to prevent short circuit and energy
discharge. Do not attempt to open or remove any of the components.

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EC DECLARATION OF CONFORMITY

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

Declare that the product,
Description WORX Cordless drill
Typ e WU159 WU166 WU166.9 WU170 (1- designation of machin-

ery, representative of cordless dril)

Function Drilling

Complies with the following Directives,
EC Machinery 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 60745-2-1
EN 60745-2-2

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/ 0 7/10
Leo Yue
POSITEC Quality Manager

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Copyright © 2012, Positec. All Rights Reserved.

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