Wesco WS3770U User manual

4.5A Jig Saw EN
WS3770U (PSJ550GU)
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E
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Fig.A Fig.B
Fig.C Fig.D
Fig.E Fig.F
Fig.G Fig.H
Fig.I Fig.J1
Fig.J2 Fig.K
Fig.L

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E
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Fig.A Fig.B
Fig.C Fig.D
Fig.E Fig.F
Fig.G Fig.H
Fig.I Fig.J1
Fig.J2 Fig.K
Fig.L

6EN
PRODUCT SAFETY
WARNING: Some dust created by power sanding,
sawing, grinding, drilling and other construction
activities contains chemicals known to the State of
California to cause cancer, birth defects or other
reproductive harm. Some examples of these chemicals are:
• Lead from lead-based paints;
• Crystalline silica from bricks and cement and other
masonry products;
• Arsenic and chromium from chemically-treated lumber.
Your risk from these exposures varies, depending on how
often you do this type of work. To reduce your exposure
to these chemicals: work in a well ventilated area, and
work with approved safety equipment, such as those dust
masks that are specially designed to filter out microscopic
particles.
WARNING: This product can expose you to
chemicals including lead and Di(2-ethylhexyl)
phthalate (DEHP) which are known to the State of California
to cause cancer and birth defects or other reproductive
harm. For more information go to www.P65Warnings.ca.
gov.
GENERAL POWER TOOL SAFETY
WARNINGS
WARNING: Read all safety warnings,
instructions, illustrations and specifications
provided with this power tool. Failure to follow all
instructions listed below 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 electric
(corded) power tool or battery-operated (cordless) power
tool.
1) 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.
2) 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.
3) 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 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 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.

7
EN
f) Dress properly. Do not wear loose clothing or
jewellery. Keep your hair and clothing 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.
h) Do not let familiarity gained from frequent use of
tools allow you to become complacent and ignore
tool safety principles. A careless action can cause
severe injury within a fraction of a second.
4) 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 remove the battery pack, if detachable, 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 and accessories. 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.
h) Keep handles and grasping surfaces dry, clean
and free from oil and grease. Slippery handles and
grasping surfaces do not allow for safe handling and
control of the tool in unexpected situations.
5) 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.
JIG SAW SAFETY WARNINGS
1. Hold jig saw by insulated gripping surfaces,
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.
2. Use clamps or another practical way to secure
and support the workpiece to a stable platform.
Holding the workpiece by hand or against your body
leaves it unstable and may lead to loss of control.
SYMBOLS
To reduce the risk of injury, user must read
instruction manual
Warning
Wear eye protection
Wear ear protection
Wear dust mask
Double insulation

8EN
COMPONENT LIST
1. Variable Speed Control
2. On/Off Switch
3. Lock-On Button
4. Hand Grip Areas
5. Hex Key
6. Vacuum Adapter
7. Base Plate
8. Angle plate
9. Pendulum action control
10. Roller guide
11. Blade holder
12. Finger protection
13. LED light (see fig. E)
* Not all the accessories illustrated or described are included in standard delivery.
TECHNICAL DATA
Type Designation WS3770U (PSJ550GU)(37-designation of machinery, representative of reciprocating saw)
Voltage 120V~60Hz
Rated power 4.5 AMP
No load speed 0~3000 /min
Stroke length 23/32”
Bevel capacity 0-45deg.L&R
Wood 2-1/2”
Aluminum 3/8”
Steel 15/64”
Protection class /II
Machine Weight 3.73 lbs
ACCESSORIES
Vacuum adapter 1
Hex key 1
10pcs blade box: 1
21TPI BIM Metal cutting blade; 2
8TPI HSS Aluminum cutting blade; 2
#50 65Mn Ceramics blade; 2
10TPI HCS Wood cutting smooth blade; 2
6TPI 65Mn Wood cutting scroll blade 2
We recommend that you purchase your accessories listed in the above list from the same store that sold you the tool.
Refer to the accessory packaging for further details. Store personnel can assist you and offer advice.

9
EN
OPERATING INSTRUCTIONS
NOTE: Before using the tool, read the instruction book
carefully.
Intended Use
The machine is intended for sawing wood, plastic, metal and
building materials while resting firmly on the workpiece. It is
suitable for straight and curved cuts with bevel angles to 45°.
The saw blade recommendations are to be observed.
1. ON/OFF SWITCH
Depress to start and release to stop your tool. (See Fig. A)
2. SWITCH LOCK-ON BUTTON
Depress on/off switch (2) then lock-on button (3) (See Fig. B),
release on/off switch first then lock-on button second. Your
switch is now locked on for continuous use. To switch off
your tool just depress and release on/off switch.
3. VARIABLE SPEED CONTROL
Adjust the thumb-wheel to increase or decrease the speed
(See Fig. C) according to the material, material thickness
and blade specification to be used (also possible during no
load operation). See Chart 1 for general guidance on speed
selection.
Avoid prolonged use at very low speed as this may damage
your jigsaw’s motor.
Chart 1
Material Speed setting
Wood 5-6
Metal 3-4
Aluminum 3-4
PVC 4-5
Ceramic 3-4
4. HAND GRIP AREAS
Always ensure you maintain a firm grip whilst operating your
jigsaw.
5. HEX KEY STORAGE
The hex key (5) is placed at the power cable sheath (See
Fig. D).
6. BLADE FITTING (See Fig. E)
NOTE: Remove the plug from the socket before carrying
out any adjustment, servicing or maintenance.
To open the blade holder rotate the ring clockwise (Jigsaw
upside down) and hold in position. Then fully insert the blade
into the blade holder slot with blade teeth facing forward and
release the ring, which will self rotate and clamp over the top
of the blade. Push the blade into the blade holder again to
ensure it is locked in position. Ensure the edge of the blade is
located in the groove of the blade guide. To remove a blade,
holds the blade and rotate the blade holder ring clockwise
then lift out the blade (blade could be spring ejected).
NOTE: For best cutting results, ensure that you use a
blade suited to the material and cut quality you need.
WARNING: Blade teeth are very sharp.
●When the holder is rotated, the blade will be ejected.
●Aim the machine so that the blade is ejected away from
yourself and other people.
7. ROLLER GUIDE (See Fig. F)
Ensure the blade is located and runs smoothly in the groove
(See Fig. F) otherwise the pendulum function will not work
correctly and the blade will not be supported during cutting.
8. PENDULUM ACTION CONTROL (See Fig. G)
The pendulum action varies the forward cutting angle of
the blade for increased cutting efficiency. This can also be
adjusted during no load running. Refer to the chart 2 for more
details. Do not use excessive blade force when cutting with
the pendulum action. The blade cuts on the upward stroke
only.
Chart 2
0Thin materials. Fine cuts. Tight curves.
IHard materials, (e.g. steel & chipboard)
II Thick materials ( e.g. wood ) & plastic
III Fast cuts (e.g. softwood). Cutting in the direc-
tion of the wood grain.
9. BASE PLATE
Adjusting the angle of the base plate (7) enables bevel
cutting. The base plate must always be held firmly against
the materials being cut to reduce saw vibration, blade
jumping or blade breakage.
10. BASE PLATE ANGLE ADJUSTMENT
Use a hex key (5). Loosen the bolts securing the base plate
(SEE FIG. H). For preset angles rotate so the lines of the angle
on the base plate and angle plate (8) superposition at the
desired angle (0°, 15°, 30°, 45°) (SEE FIG. I). For other mitre
angles, rotate to your desired angle (use a protractor scale).
Following one of the above procedures, hold the base plate
in position and firmly tighten the bolts to clamp the base
plate at that angle. Finally, check the angle and ensure the
base plate is firmly clamped. The angle markings on the
base plate are accurate for most general purposes but it
is recommended for accurate work to set the angle with a
protractor and make a test cut on other material.

10 EN
11. VACUUM ADAPTER (SEE FIG. J1, J2)
Mount the vaccum adapter (6) into the opening of the base
plate (7). Make sure that the plastic tip of the vacuum
connection engages into the corresponding opening on the
housing as shown in the figure.Directly connect a suitable
vacuum hose to the adapter. Clean the vacuum adapter
regularly to ensure optimum dust extraction. The vacuum
cleaner must be suitable for the material to be worked.
Remove the vacuum adapter when not use.
NOTE:It is suggested that the vacuum adapter is not be
mounted when no external dust extraction is connected. Or
there is danger of the extraction system becoming clogged.
12. FINGER PROTECTION
The finger protection is located in front of the blade holder.
Whilst working, it will help prevent accidental contact with
moving blade.
13. DUST BLOWER AIR HOLE
This is a small aperture located underneath the housing just
behind the blade guide. Ensure this is kept clean to allow the
air flow to continually blow dust away from the cutting area.
14. PARALLEL GUIDE (NOT SUPPLIED)
Slide the parallel guide arm through both parallel guide
fixtures and tighten the locking nut to achieve the required
cutting distance. The parallel guide can be mounted in two
positions.
WORKING HINTS FOR YOUR JIG SAW
If your jig saw becomes too hot, especially when used at low
speed, set the speed to maximum and run no Load for 2-3
minutes to cool the motor. Avoid prolonged usage at very low
speeds.
GENERAL
Always use a blade suited to the material and material
thickness to be cut. Always ensure the work–piece is firmly
held or clamped to prevent movement. For easier control, use
low speed to start cutting, then increase to correct speed.
Any movement of the material may affect the quality of the
cut. The blade cuts on the upward stroke and may chip the
uppermost surface or face of the work piece. Ensure your
uppermost surface is a non-visible surface when your work
is finished.
CUTTING LAMINATES
Use a fine tooth blade when cutting most laminates and thin
wood materials. To reduce edge chipping, clamp pieces of
waste wood at both ends on both sides and cut through the
waste wood during cutting.
CIRCLE CUTTING
Do not use the pendulum action when cutting tight circles or
angles
PLUNGE SAWING
Plunge cutting may be used only on soft materials such as
wood, aerated concrete, gypsum plaster boards, etc.
Use only short saw blades.
Place the front edge of the base plate on the workpiece and
switch on. Press the machine firmly against the workpiece
and plunge the saw blade slowly into the workpiece.
As soon as the complete surface of the base plate rests on
the work piece, continue to saw along the cutting line. (See
Fig. K, L)
METAL CUTTING
Use a finer tooth blade for ferrous metals and a coarse tooth
blade for non-ferrous metals. When cutting thin sheet metals
always clamp wood on both sides of the sheet to reduce
vibration or tearing of the sheet metal. Both wood and sheet
metal must be cut. Do not force the cutting blade when
cutting thin metal or sheet steel as they are harder materials
and will take longer to cut. Excessive blade force may reduce
the life of the blade or damage the motor. To reduce heat
during metal cutting, add a little lubricant along the cutting
line.
MAINTENANCE
Remove the plug from the socket 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.
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.