Hilti 427728 Use and Care Manual
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11 Pages
Hilti 427728 is a circular saw designed for precise and efficient cutting of wood and other materials. It features a powerful motor that delivers 5,800 rotations per minute, ensuring fast and clean cuts. The saw's cutting depth can be adjusted up to 62.5 millimeters, allowing for versatile use in various applications. Additionally, it has a pendulum action that provides increased cutting efficiency and reduces user fatigue.
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ORIG
I]{At
O
PERATI l{G I]{STRUGTIOI{S
Gircular
Saw WSG 7.25-5
It
is
essential
thatthe operating instructions
are read before the
tool is
operated tor the
tirctIime.
Always keep these
operating instructions
together with the
tool.
Ensure that the
operating instructions are
with the
toolwhen
percons.
it
is
given
to
olher
re
Blade diameter
Max. Cutting depth
at
at45'
43.5 mm (1-11116") at
0'
185
62.5 mm (7-114 ) mm (2-7116'\
56'
32.5 mm (1-1l4")
No load soeed (RPM)
Overall
lenoth
5.800/min.
-I
mm
n21l2r\
Net weioht
.
Due
5.2 ko (1 1-112 lbs) to our continuing program of research and development, the specifications herein are subject
.
to change without notice.
Specifications may differ
.
Weight according from country to country.
to EPTA-Procedure 01/2003
IlIr
Conlents
1.
3.
Soecifications
2. General PowerTool
Safetv Instructions
SafetvWarnings
1
forall
saws
4. Further Safety lnstructions for all
saws
3
2
5.
6.
Safety Instructions for Saws
Guard
Savethese with Pendulum
Instructions
7. Svmbols
4
5
8. Functional Descriotion
9. Assemblv
10.
1
1.
'12.
0peration
Maintenance
Accessories
13. Manufacturer's warrantv
-
t00ls 10
8
9
10
tal
'lxi
WARNING Read all salety wamings and all instruc-
tions.
Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury.
Save all warnings and inskuctions lor futute telerence
The term "power tool" in the warnings refers to
your
mains-operated (corded) ed (cordless) powertool.
powertool or battery-operat-
1.1 Work area
salely
a) Keep work area clean and
well lit.
Cluttered or dark b) areas
Do invite accidents.
not
operale
power
tools
in
explosive
atmospheres, such as in lhe presence ol llammable
liq-
uids, gases or dusl. Power tools create sparks which may ignite the dust or fumes.
c) Keep children and bystanders away ing a power
tool.
Distractions
while
can cause you operalto lose control.
2.2 ElectriEal satety a) Power lool plugs musl match the outlel. Never modity the plug in any way. Do nol use any adapter plugs
with
earthed (grounded) power
lools.
Unmodified plugs and matching outlets
will
reduce risk of electric shock.
b)
Avoid body contact
with
faces such as pipes, earthed
radialors,
or grounded surranges and
relrig-
erators. There is an increased risk of electric shock if your body is eafihed or grounded.
c) Do not expose p0wer l00ls t0 rain or wet condilions.
Water entering a power tool will increase the risk of electric shock.
d) Do not abuse the cord. Never use lhe cord for carrying,
pulling
or unplugging the cord away from heat,
oil,
power
tool.
Keep sharp edges or moving pads.
Damaged or entangled cords increase the risk of electric shock.
I
e) When operaling a power tool 0uld00rs, use an exlen-
Ell
sion cord
suitable for
ouldoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
f) ll
operating
a power
lool in
a
damp location
is unavoidable, use a ground
(GFCI)
lault
circuit
interupter
prolected supply. Use of a GFCI reduces the risk of electric shock.
2.3 Penonal salety 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 b) serious oersonal iniurv.
Use
perional protictive
equipment. Always wear eye protecti0n. 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 is in the
starting.
Ensure the switch
ofFposition
belore connecling
lo
power source and/or battery pack, picking up
ol
carrying the tool.
Carrying power tools with your finger on the switch or energising power t00ls that have the switch on invites accidents.
d) Remove any adjusting key or wlench belore turning the power tool on. A wrench or a key left attached t0 a rotating pafi of the power tool may result in personal injury.
e) Do nol overreach. Keep properfooling and balance at all times. This enables better control of the oower tool in unexoected situations.
f)
Dress properly.
Do not wear loose clolhing or jew-
ellery.
Keep your hair,
clothing,
and gloves away from moving pads. Loose clothes, jewellery or long hair can be caught in moving parts.
g)
lf
devices are provided lor the conneclion of dust extlaGli0n and
colleclion facilities.
ensure these are connected and properly used. Use of dust collection can reduce dust-related hazards.
2.4 Power tool use and carg a) Do nol force the power
lool.
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 nol use the powel lool il 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) Disconnecl the plug lrom lhe powel source and/or
lhe
batlery pack from the power
tool
belore making any adjustments, changing accessories, or storing power
tools.
Such preventive safety measures reduce the risk of starting the power tool accidentally.
d) Slore idle power tools out ol the reach of children and do not allow persons unfamiliar wilh the power
tool
or lhese instructions t0 operale lhe power
tool.
Power
tools
are dangerous in the hands
of
untrained users.
e)
Mainlain
power
lools.
Check
lor
misalignment 0r binding ol moving parts, breakage of parts and any olhel condition lhat may atfect lhe power tool's oper-
ation. lf
damaged, have
lhe
power
tool
repaired before use. Many accidents are caused by poorly maintained oower tools.
f)
Keep cutting tools shary 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
lool
bits etc.
in accordance with these instructions, taking into accounl the working conditions and the work to be performed.
Use of the power tool for operations
dit
ferent from those intended could result in a hzardous situation.
2.5 Service a) Have your power tool serviced by a qualified person using only identical replacement repair pafis. This will ensure that the safety of the power tool is maintained.
a)
tt
/Al
DANGER: Keep hands away lrom cutting area and the blade.
Keep your second hand on auxiliary b) handle, or motor housing. lf both hands are holding the saw, they cannot be cut by the blade.
0o not reach underneath the workpiece.
The guard cannot protect you from the blade below piece.
the workc) Adiust lhe cutling depth l0 the thickness ol lhe wodrpiece.
Less than a full tooth of the blade teeth should be visible below the workoiece.
d) Never hold piece being cul in your hands 0r acloss your leg. Secure the workpiece l0 slable plalform.
It is important to support the work properly to minimize body exposure, blade binding, or loss of control.
A typical illustration of proper hand support, workpiece support, and supply cord routing (if applicable).
g) Always use blades with conect 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
boll.
The blade washers and
b0lt
were
specially
designed for your saw, for optimum performance and safety of operation.
e) Hold power lool by insulaled gripping surlaces when
peiloming
an operation where the cutling tool may contact hidden wiring 0r its own cord. Contact with a "live" wire will also make exposed metal parts of the power tool "live" and shock the ooerator.
f)
When ripping always use a rip fence or straight edge guide.
This improves the accuracy of cut and reduces the chance of blade bindino.
a) Causes and 0perator Prevention of Kickback:
-
kickback is a sudden reaction to a pinched, bound or misaligned saw blade, causing an uncontrolled saw to lift uo and out of the workoiece toward the
00eralor:
-
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 operat0r;
-
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
0peralor.
Kickback is the result of saw misuse and/or incorrect operating procedures 0r conditions and can be avoided by taking proper precautions as given below:
1. Maintain a
firm
grip with both hands on lhe saw and p0sition y0ur alms t0 resisl 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.
2. When blade is
binding,
or when
interrupling
a cut lor any reason, release lhe trigger and hold the saw motionless in the material until the blade comes t0 a complete the saw stop. Nevel attempt to remove lrom the work or pull lhe saw backward
while the blade is in motion
or
kickback
may occur. Investigate and take corrective actions to eliminate the cause 0f blade binding.
3. When restarling a saw in the workpiece, centre the saw blade in the kerl and check thal saw teeth are not engaged inlo the material. lf saw blade is binding, it may walk up or kickback f rom the workoiece as the saw is restafted.
4. Support large panels to minimise the ilsk of blade pinching and kickback. Large panels tend to sag under their own weight. Supports must be placed under the panel
0n both sides, near the line of cut and near the edge of the panel.
To avoid kickback, do support board or panel near the cur.
D0 not support board or panel away from the cut.
5. Do nol use dull or damaged blades. Unsharpened or improperly set blades produce nanow kerf causing excessive friction, blade binding and kickback.
6. Blade depth and bevel adjusting locking levers must be
lighl
and secure belore making
cut. lf
blade adjustment shifts while cutting, it may cause binding and kickback.
7. Use extra caulion when making a "plunge cut" into existing walls or other blind areas. The protruding blade may cut obiects that can cause kickback.
a) Gheck lower guard
lor
proper closing before each use. Do not operate the saw if lower guard does not move freely and close inslanlly. Never clamp or
lie
the lower guard into lhe open posilion. lf 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 ol the lower guard
spring. lf
the guard and the spring are not operating propelly, they must be serviced belore use. Lower guard may operate sluggishly due to damaged parts, gummy deposits, or a build-up of debris.
c) Lower guard should be retracted manually only
for
special culs such as "plunge cuts" and "compound cuts." Raise lower guard by retracting handle and as soon as blade enters guard must be
released. the
For
malerial, the lower
all other sawing, the lower guard should operate automatically.
d) Always observe thal 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.
e) ALWAYS hold the
toollirmly wilh
both hands. NEV'
ER place your hand or
lingers
behind the
saw. lf
kickback occurs, the saw could easily
jump
backwards over your hand, leading to serious personal injury.
ing the saw can cause uneven cuts, loss of accuracy, and oossible kickback.
g) Use extra caulion when cutting damp wood, pressure
treated lumber,
or wood
conlaining knots.
Adjust speed 0f cut t0 maintain smooth advancement of tool without decrease in blade speed.
h) Do not attempt to remove cut malerial when blade is moving. Wail
until
blade stops before grasping cut
material.
CAUTI0N: Blades coast after turn off.
i)
Avoid Cutting Nails. Inspect for and remoue all nails from lumbel before cutling.
j)
Place the wider portion ol the saw base 0n that pan ol the workpiece which is solidly supported, nol on the section that
will fall oll
when the cut is made.
As examples, Fig. 1
illuslrates
the RIGHT way to cut ofl the end of a board, and Fig. 2 the WROllG
way. lf
the
workpiece
is
shori
or
small, clamp
il
down.
D0 NOT TRY T0 H0LD SH0BT PIECES BY
HAND!
fl
Never
lorce
the
saw.
Push the saw
forward
at a speed so that the blade cuts wilhout slowing. Forck) Before setling the tool down after completing a cut, be sure that
the lower
guard has closed and the blade has come to a complete stop.
l)
Never attempt t0 saw
wilh
the
circular
saw held upside down in a
vise.
This is extremely dangerous and can lead to serious accidents.
m) Some material contains chemicals which may be loxic. Take caution t0 prevent dusl inhalalion and skin contacl. Follow material supplier sately data.
n) Do nol stop the blades by
lateral
pressure on the saw blade.
o) Always use blades recommended in
this
manual,
Do not use any abrasive wheels.
p) Keep blade sharp and clean. Gum and wood pitch hardened on blades slows saw and increases ootential for kickback. Keep blade clean by
first
removing it from tool, then cleaning it with gum and pitch remover, hot water or kerosene. Never use oasoline.
o)lflji;,lttt task
and hearins protection when
use
!il
r) Follow instruction lor lubricaling
and changing accessories.
s) Keep
handls
dry clean and lrce fiom oil and grcase.
USE PR0PER EX|ENSI0N C0RD. Make sure your extension cord is in good condition. When using an extension cord, be sure to use one heavy enough to carry the current your product will draw. An undersized cord will cause a drop in line voltage resulting in loss of power and overheating. Table 1 shows the correct size t0 use depending 0n cord length and nameplate ampere rating. lf in doubt, use the next heavier gage. The smaller the gage number, the heavier the cord.
Table
1:Minimum
Ampere Rating
IU ta
Not More Than b
10
12
16
Volts
120 V
Total
25ft.
AWG
18
18
16
14
50 ft.
to
16
16
12
1
00 ft.
16
14
14
1
50 ft.
14
1
mt
IANIWARNING:
D0 NOT let comforl or familiarity with product (gained from repealed use) replace
sllict
adherence to safety rules lor the subiect product. MISUSE or failure to follow the salety rules staled in this inslruction manual may cause seilous personal injury.
a--l
]ZSJWARNING:
Some dust created by grinding, sanding, cutting, and
drilling
contains chemicals known to cause Gancer, birth defects,
infefiility
or other reproductive harm; or
selious
and
pelmanent respiratory
or other
injury.
Some examples of these chemicals are:
.
.
lead from lead-based paints, crystalline silica from bricks, concrete and other mason-
.
ry products and natural stone, arsenic and chromium from chemicallv-treated lum-
0er.
Your risk from these exposures varies, depending on how often you do this type of work. To reduce exposure to these chemicals, the operalor and byslanden should
wo*
in a
well-ventilated alea,
work
wilh
approved salety equipmenl, such as respiratory prolection appropriate lor the type of dust generated, and designed to
filter
out microscopic
paflicles
and direcl dust away from the face and body. Avoid prolonged contact with dusl. War proteclive clolhing and wash exposed areas
with
soap and water. Allowing dust t0 get into
your
mouth, eyes, or to remain on your skin may promote absorotion of harmful chemicals.
The followings show the symbols used for tool.
.
volts EX
Hz
F./,
.
amperes
.
hertz
.
alternating current
no
.
no load speed
E
.../min fTmin
.
Class ll Construction
.
revolutions or reciprocation per minute
/l\I
z_trlcAUTl0N:
.
Always be sure that the tool is switched off and unplugged before adjusting or checking function on the tool.
Adiusling deplh of cut
2
1. Lever
2. Depth guide
.
ll\isauflsx.
After adjusting the depth of cut, always tighten the lever securely.
Loosen the lever on the depth guide and move the base up or down. At the desired depth of cut, secure the base by tightening the lever.
For cleaner, safer than one blade cuts, set cut depth s0 that n0 more tooth projects below workpiece. Using proper cut depth helps to reduce potential for dangerous KICKBACKS which can cause personal injury.
Eevel cutting
Positive stopper
Turn the positive stopper so that the arrow on it points one of three positi0ns
(22.5',45',56').
Then, tilt the tool base until it stoos and secure the base with the lever. At this time, the same angle as the one that the arrow points is obtained.
Setting bevel angle
Loosen the lever and tentatively set the tool base at the
0"bevel angle, then tighten the lever securely.
Turn the positive stopper so that the arrow on it points one of three positions
(22.5',45",56')
that is equal to or greater than the desired bevel angle.
Loosen the lever again and then tilt and secure the tool base at the desired angle securely.
NOTE:
.
When changing the positive stopper's position, loosening the lever and tilting the bevel angle t0 less than the desired stopper position number allows to change rt.
.
When the arrow on the positive stopper points 22.5, the bevel angle can be adjusted 0 -
22.5';when
the arrow points 45, it can be adjusted 0 - 45"; when the arrow points 56, it can be adjusted 0
-
56'.
Sighling
1. Lever
2. Positive stopper
3. Arrow on positive sr0pper
For straight cuts, align the A position on the front of the base with your cutting line. For
45'
bevel cuts, align the
B oosition with it.
Switch action
1. Switch Viggel
Lighting the lamp
'1.
Lamp
mt
lz--\/cAuTt0N:
.
Before plugging in the tool, always check to see that the switch trigger actuates properly and returns t0 the
"0FF' oosition when released.
To start the t001, simply pull the switch trigger. Release the switch trigger to stop.
Electric brake
This tool is equipped with an electric blade brake. lf the tool consistently fails to quickly stop blade after switch trigger release, have t00l serviced at a Hilti service center.
The blade brake system is not a substitute
for
lower guard.
NEVER USE
T00L
WITHOUT A FUNCTI0NING
LOWER GUARD. SERIOUS PERSONAL INJURY CAN
RESULT.
]/i\
lz-.-r cAlJTl0N:
.
Do not apply impact to the lamp, which may cause damage or shorted service time t0 it.
.
Do not look in the light or see the source of light directly.
The lamp lights up when the tool is plugged. The lamp keeps on lighting until the tool is unplugged.
lf the lamp does not light up, the mains cord may be defective. The lamp is lit but the tool does n0t start even if the
tool
is switched on, the carbon brushes may be worn out, the m0t0r orthe 0N/0FF switch may be defective.
NOTE:
.
Use a dry cloth to wipe the dirt off the lens of lamp. Be careful not t0 scratch the lens of lamp, or it may lower the illumination.
f-t
Lr=-}l cAUTlON:
.
Ah^ays be sure that the tool is switched off and unplugged before carrying out any work on the to0l.
Hex wrench storage
Removing or installing saw blade
1. Hex wrench
2. Shaft lock
1. Hex wrench
2. Protrusion
Hex wrench is stored on the tool. To remove hex wrench, rotate it toward yourself and pull it out.
To install hex wrench, place it on the handle and turn it until it comes into contact with the orotrusion on the handle.
GAUTIOl,I:
.
Be sure the blade is installed with teeth pointing up at
.
the front of the tool.
Use only the Hilti wrench to install or remove the blade.
To remove the blade. oress the shaft lock so that the blade cannot revolve and use the hex wrench to loosen the hex bolt counterclockwise. Then remove the hex bolt, outer flange and blade.
To install the blade, follow the removal procedure in
TEVETSE. BE SURE TO TIGHTEN THE HEX BOLT CLOCK-
WISE SECURELY.
When changing blade, make sure to also clean upper and lower blade guards of accumulated sawdust. Such efforts do not, however, replace the need to check lower guard operation before each use.
1. Hex bolt
2. 0uter flange
3. Saw blade
4. lnner llange
5. Ring
CAUTION:
.
Be sure to move the tool forward in a straight line gently. Forcing 0r twisting the tool will result in overheating the motor and dangerous kickback, possibly causing severe injury.
1. Base
2. Rear handle
3. Front grip
Rip fence (Guide rule) l.
Rip fence
(Guide rule)
Hold the tool firmly. The tool is provided with both a front grip and rear handle. Use both to best grasp the tool.
lf
both hands are holding saw, they cannot be cut by the blade. Set the base 0n the workoiece to be cut without the blade making any contact. Then turn the tool 0n and wait until the blade attains full speed. Now simply move the tool forward over the workpiece surface, keeping
it
flat and advancing smoothly until the sawing is comoleted.
To get clean cuts, keep your sawing line straight and your speed of advance uniform. lf the cut fails to properly follow your intended cut line, do not attempt to turn or force the tool back to the cut line. Doing so may bind the blade and lead t0 dangerous kickback and possible serious inlury. Release switch, wait lor blade to stop and then
withdrawtool.
Realign tool on new cut line, and start cut again. Attempt to avoid positioning which exposes operator to chips and wood dust being ejected saw. Use eye protection to help avoid injury.
from
The handy rip fence allows you t0 do extra-accurate straight cuts. Simply slide the rip fence up snugly against the side of the workpiece and secure it in position with the screw on the front of the base. lt also makes repeated cuts of uniform width possible.
|^t
IAN
CAUTION:
.
Always be sure that the tool is switched ofi and unplugged before attempting to perlorm inspection or mainte-
.
nance.
Never use gasoline, benzine, thinner, alcohol or the like. Discoloration, deformation or cracks may result.
Adiusting for accuracy of
90'
cut
(veilical
cut)
This adjustment has been made at the factory. But if it is off, adjust the adjusting screw with a hex wrench while squaring the blade with the base using a triangular rule, try square, etc.
1
. Base
2. Adjusting screw
1. Brush holder cap
2. Screwdnver
After replacing brushes, plug in the tool and break in brushes by running tool with no load for about 10 minutes. Then check the tool while running and electric brake operation when releasing the switch trigger. lf electric brake is not working well, ask your local Hilti service center for reoair.
To maintain product SAFEW and
RELIABILIft
repairs, any other maintenance or adjustment should be performed by Hilti Authorized or Factory Service Centers, always using Hilti replacement parts.
1. Triangular rule
Replacing caft on brushes
1. Limit mark
Remove and check the carbon brushes regularly. Replace when they wear down to the limit mark.
Keep the carbon brushes clean and free to slio in the holders. Both carbon brushes should be replaced at the same time.
Use only identical carbon brushes.
Use a screwdriver to remove the brush holder caos. Take out the worn carbon brushes, insert the new ones and secure the brush holder caos.
m
t{-$t
cAUTloN:
.
These accessories or attachments are recommended for use with your Hilti tool specified in this manual. The use of any other accessories or attachments might present a risk of injury to persons.
Only use accessory or attachment for its stated purpose.
lf you need any assistance for more details regarding these
.
Steel access0ries, ask your local Hilti Service Center.
& Carbide-tipped saw blades
Combination
General purpose blade for fast and smooth rip, crosscuts and miters.
Pressure treated/ Designed for fast cutting of
Wet
lumber
pressure treated and wet lumber.
Fine cross
cuts
For sand-free cuts cleanly against
.
.
Rip fence (Guide rule)
Hex wrench
Hilti warrants that the
tool
supplied is free of defects in material and workmanship. This warranty is valid so long as the
tool
is operated and handled correctly, cleaned and serviced properly and in accordance with the Hilti 0perating Instructions, and the technical system is maintained. This means that only original Hilti consumables, comp0nents and spare parts may be used in the tool.
This warranty provides the
free-of-charge
repair or replacement of defective parts only over the entire lifespan o{ the tool. Parts requiring repair or replacement as a result of normal wear and tear are not covered bv this warranty.
Additional claims are excluded, unless stringenl
national rules prohibit such exclusion. In
particulal,
Hilti
is not
obligaled for direct, indirect, incidental
or
consequenlial damages,
losses or expenses in connection with, or by reason 01, the use 0f, 0r inability to use the tool for any purpose. lmplied warranlies of
melchantabilig
or fitness for a particular purpose are
specifically
excluded.
For repair
or
replacement, send
tool
or related parts immediately upon discovery of the defect to the address of the local Hilti marketing organization provided.
This constitutes Hilti's entire obligation with regard to warranty and supersedes all prior 0r contemporane-
0us comments and 0ral or
written
a0reements c0ncerning warranties.
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Frequently Answers and Questions
For a Circular Saw, what is the recommended cut depth?
How to prevent accidental starting of the power tool?
What is necessary to reduce the risk of electric shock when operating power tools outdoors?
How to avoid kickback when using a circular saw?
What is the maximum cutting depth for the Hilti Circular Saw WSG 7.25-5?
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