Hilti 427728 Use and Care Manual
Contents
1. FUNCTIONING LOWER GUARD SERIOUS PERSONAL INJURY CAN RESULT Lighting the lamp CAUTION e Do not apply impact to the lamp which may cause damage or shorted service time to it e 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 If the lamp does not light up the mains cord may be defective The lamp is lit but the tool does not start even if the tool is switched on the carbon brushes may be worn out the motor or the ON OFF switch may be defec tive NOTE e Use a dry cloth to wipe the dirt off the lens of lamp Be careful not to scratch the lens of lamp or it may low er the illumination 9 Assembly CAUTION e Always be sure that the tool is switched off and unplugged before carrying out any work on the tool Hex wrench storage 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 protrusion on the handle SUE Removing or installing saw blade 1 Hex wrench 2 Shaft lock CAUTION e Be sure the blade is installed with teeth pointing up at the front of the tool e Use only the Hilti wrench to install or remove the blade To remove the blade press the shaft lock so that the blade cannot revolve and use the hex w2. a m E WSC 7 25 S Operating instructions en Mode d emploi fr Manual de instrucciones es ORIGINAL OPERATING INSTRUCTIONS Circular Saw WSC 7 25 S It is essential that the operating instructions are read before the tool is operated for the first time Always keep these operating instructions together with the tool Ensure that the operating instructions are with the tool when it is given to cther persons Contents Page 1 Specifications 1 2 General Power Tool Safety Warnings 1 3 Safety Instructions for all saws 2 4 Further Safety Instructions for all saws 3 5 Safety Instructions for Saws with Pendulum Guard 4 6 Save these Instructions 5 7 Symbols 6 8 Functional Description 6 9 Assembly 7 10 Operation 8 11 Maintenance 9 12 Accessories 10 13 Manufacturer s warranty tools 10 WSC 7 25 S 185 mm 7 1 4 at 0 62 5 mm 2 7 16 Max Cutting depth at45 43 5 mm 1 11 16 at56 32 5 mm 1 1 4 No load speed RPM 5 800 min Model Blade diameter Overall length 317 mm 12 1 2 Net vveight 5 2 kg 11 1 2 lbs e Due to our continuing program of research and development the specifications herein are subject to change without notice e Specifications may differ from country to country e Weight according to EPTA Procedure 01 2003 2 General Power Too Safety Warnings WARNING Read all safety warnings and all instruc tions Failure to follow the warnings and instructions may re
3. act with dust War protective clothing and wash exposed areas with soap and water Allowing dust to get into your mouth eyes or to remain on your skin may promote absorption of harmful chemicals nn 7 Symbols The followings show the symbols used for tool V volts A amperes Hz hertz fs alternating current A CAUTION e Always be sure that the tool is switched off and unplugged before adjusting or checking function on the tool Adjusting depth of cut 2 Depth guide CAUTION e 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 cuts set cut depth so that no more than one blade tooth projects below workpiece Using proper cut depth helps to reduce potential for danger ous KICKBACKS which can cause personal injury Bevel cutting 1 Lever 2 Positive stopper 3 Arrow on positive stopper No no load speed El Class II Construction min revolutions or reciprocation per minute r min P p 8 Functional Description Positive stopper Turn the positive stopper so that the arrow on it points one of three positions 22 5 45 56 Then tilt the tool base until it stops and secure the base with the lever At this time the same angle as the one that the arrow points is obtained Setting bev
4. cable 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 a 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 oper ator 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 avoid ed by taking proper precautions as given below 1 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 pre ca
5. el 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 e When changing the positive stopper s position loos ening the lever and tilting the bevel angle to less than the desired stopper position number allows to change it e 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 Sighting For straight cuts align the A position on the front of the base with your cutting line For 45 bevel cuts align the B position with it Switch action CAUTION e Before plugging in the tool always check to see that the switch trigger actuates properly and returns to the OFF position when released To start the tool simply pull the switch trigger Release the switch trigger to stop Electric brake This tool is equipped with an electric blade brake If the tool consistently fails to quickly stop blade after switch trigger release have tool serviced at a Hilti service cen ter The blade brake system is not a substitute for lower guard NEVER USE TOOL WITHOUT A
6. identical carbon brushes Use a screwdriver to remove the brush holder caps Take out the worn carbon brushes insert the new ones and secure the brush holder caps 1 Brush holder cap 2 Screw driver After replacing brushes plug in the tool and break in brushes by running tool with no load for about 10 min utes Then check the tool while running and electric brake operation when releasing the switch trigger If electric brake is not working well ask your local Hilti service center for repair To maintain product SAFETY and RELIABILITY repairs any other maintenance or adjustment should be per formed by Hilti Authorized or Factory Service Centers always using Hilti replacement parts A CAUTION e 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 pre sent a risk of injury to persons Only use accessory or attachment for its stated purpose _ If you need any assistance for more details regarding these accessories ask your local Hilti Service Center e Steel amp 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 the grain e Rip fence Guide rule e Hex wrench 13 Manufacturer s warranty tools H
7. ilti 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 Operating Instructions and the technical sys tem is maintained This means that only original Hilti consumables components 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 lifes pan of the tool Parts requiring repair or replacement as a result of normal wear and tear are not covered by this warranty Additional claims are excluded unless stringent national rules prohibit such exclusion In particular 10 Hilti is not obligated for direct indirect incidental or consequential damages losses or expenses in connection with or by reason of the use of or inabil ity to use the tool for any purpose Implied warranties of merchantability 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 or contemporane ous comments and oral or written agreements con cerning warranties
8. l down after completing a cut be sure that the lower guard has closed and the blade has come to a complete stop I Never attempt to saw with the circular saw held upside down in a vise This is extremely danger ous and can lead to serious accidents m Some material contains chemicals which may be toxic Take caution to prevent dust inhalation and skin contact Follow material supplier safety data n Do not stop the blades by lateral pressure on the saw blade 0 Always use blades recommended in this manual Do not use any abrasive wheels Table 1 Minimum gage for cord p Keep blade sharp and clean Gum and wood pitch hardened on blades slows saw and increases poten tial 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 gasoline q Wear a dust mask and hearing protection when use the tool r Follow instruction for lubricating and changing accessories s Keep handles dry clean and free from oil and grease USE PROPER EXTENSION CORD Make sure your exten sion cord Is in good condition When using an exten sion 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 to use depending on cord length and nameplate ampere rat ing If in doubt use the next heavier gage The s
9. maller the gage number the heavier the cord Ampere Rating Total length of cord feet 150 ft More Than INotMoreThan JANG 0 dl 6 MOS ire Se ee be a lo 12 oo te ie a Not recommended 6 6 Save these Instructions lt lt lt these Instructions A WARNING DO NOT let comfort or familiarity with product gained from repeated use replace strict adherence to safe ty rules for the subject product MISUSE or failure to follow the safety rules stated in this instruction man ual may cause serious personal injury A A warnine Some dust created by grinding sanding cutting and drilling contains chemicals known to cause cancer birth defects infertility or other reproductive harm or serious and permanent respiratory or other injury Some examples of these chemicals are e lead from lead based paints e crystalline silica from bricks concrete and other mason ry products and natural stone e arsenic and chromium from chemically treated lum ber Your risk from these exposures varies depending on how often you do this type of work To reduce exposure to these chemicals the operator and bystanders should work in a well ventilated area work with approved safety equipment such as respiratory protection appro priate for the type of dust generated and designed to filter out microscopic particles and direct dust away from the face and body Avoid prolonged cont
10. nd lead to dangerous kickback and possible serious injury Release switch wait for blade to stop and then withdraw tool Realign tool on new cut line and Start cut again Attempt to avoid positioning which expos es operator to chips and wood dust being ejected from saw Use eye protection to help avoid injury 8 Rip fence Guide rule 1 Rip fence Guide rule The handy rip fence allows you to 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 It also makes repeat ed cuts of uniform width possible ee 11 Maintenance CAUTION e Always be sure that the tool is switched off and unplugged before attempting to perform inspection or mainte nance e Never use gasoline benzine thinner alcohol or the like Discoloration deformation or cracks may result Adjusting for accuracy of 90 cut vertical 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 2 Adjusting 1 Triangular rule Replacing carbon brushes 1 Limit mark Remove and check the carbon brushes regularly Replace when they wear down to the limit mark Keep the car bon brushes clean and free to slip in the holders Both carbon brushes should be replaced at the same time Use only
11. operly set blades produce narrow kerf caus ing excessive friction blade binding and kickback 6 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 7 Use extra caution when making a plunge cut into existing walls or other blind areas The pro truding blade may cut objects that can cause kick back 5 Safety Instructions for Saws with Pendulum Guard 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 acci dentally 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 proper ly they must be serviced before use Lower guard may operate sluggishly due to damaged parts gum my deposits or a build up of debris c Lower guard should 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 lowe
12. r 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 tool firmly with both hands NEV ER place your hand or fingers behind the saw If kickback occurs the saw could easily jump back wards over your hand leading to serious personal injury f Never force the saw Push the saw forward ata speed so that the blade cuts without slowing Forc ing the saw can cause uneven cuts loss of accuracy and possible kickback g Use extra caution when cutting damp wood pres sure treated lumber or wood containing knots Adjust speed of cut to maintain smooth advancement of tool without decrease in blade speed h Do not attempt to remove cut material when blade is moving Wait until blade stops before grasping cut material CAUTION Blades coast after turn off i Avoid Cutting Nails Inspect for and remove all nails from lumber before cutting j Place the wider portion of the saw base on that part of the workpiece which is solidly supported not on the section that will fall off when the cut is made As examples Fig 1 illustrates the RIGHT way to cut off the end of a board and Fig 2 the WRONG way If the workpiece is short or small clamp it down DO NOT TRY TO HOLD SHORT PIECES BY HAND k Before setting the too
13. rench to loosen the hex bolt counterclockwise Then remove the hex bolt outer flange and blade To install the blade follow the removal procedure in i reverse BE SURE TO TIGHTEN THE HEX BOLT CLOCK WISE SECURELY 1 Hex bolt 2 Outer flange 3 Saw blade 4 Inner flange 5 Ring 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 low er guard operation before each use 10 Operation CAUTION e Be sure to move the tool forward in a straight line gen tly Forcing or twisting the tool will result in overheat ing the motor and dangerous kickback possibly caus ing severe injury 1 Base 2 Rear handle 3 Front grip Hold the tool firmly The tool is provided with both a front grip and rear handle Use both to best grasp the tool If both hands are holding saw they cannot be cut by the blade Set the base on the workpiece to be cut without the blade making any contact Then turn the tool on 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 com pleted To get clean cuts keep your sawing line straight and your speed of advance uniform If the cut fails to prop erly 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 a
14. s properly Do not wear loose clothing or jew ellery 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 col lection can reduce dust related hazards 2 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 the battery pack from the power tool before mak ing any adjustments changing accessories or stor ing 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 pow er 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 oper ation If damaged have the power tool repaired before use Many acciden
15. sult 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 operat ed cordless power tool 2 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 atmos pheres such as in the presence of flammable liq uids gases or dust Power tools create sparks which may ignite the dust or fumes c Keep children and bystanders away while operat ing a power tool Distractions can cause you to lose control 2 2 Electrical safety a Power tool plugs must match the outlet Never mod ify 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 elec tric shock b Avoid body contact with earthed or grounded sur faces such as pipes radiators ranges and refrig erators 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 car rying 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
16. tool outdoors use an exten sion cord suitable for outdoor use Use of a cord Suitable for outdoor use reduces the risk of electric shock l f If operating a power tool in a damp location is unavoidable use a ground fault circuit interrupter GFCI protected supply Use of a GFCI reduces the risk of electric shock 2 3 Personal safety a Stay alert watch what you are doing and use com mon sense when operating a power tool Do not use a power tool while you are tired or under the influ ence 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 turn ing the power tool on A wrench or a key left attached to a rotating part of the power tool may result in per sonal injury e Do not overreach Keep proper footing and balance at all times This enables better control of the pow er tool in unexpected situations f Dres
17. ts are caused by poorly maintained power tools f Keep cutting tools sharp and clean Properly main tained 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 dif ferent from those intended could result in a hazardous situation 2 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 main tained 3 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 the blade b Do not reach underneath the workpiece The guard cannot protect you from the blade below the work piece c Adjust the cutting depth to the thickness of the work piece 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 stable platform It is important to support the work properly to mini mize body exposure blade binding or loss of con trol A typical illustration of proper hand support workpiece support and supply cord routing if appli
18. utions are taken 2 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 3 When restarting a saw in the workpiece centre the saw blade in the kerf and check that saw teeth 4 Further Safety Instructions for all saws g Always use blades with correct size and shape dia mond 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 are not engaged into the material If saw blade is binding it may walk up or kickback from the work piece as the saw is restarted 4 Support large panels to minimise 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 To avoid kickback do support board or panel near the cut Do not support board or panel away from the cut 5 Do not use dull or damaged blades Unsharpened or impr
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