SCW 70 - Saw HILTI - Free user manual and instructions

USER MANUAL SCW 70 HILTI

Printed: 14.05.2014 | Doc-Nr: PUB / 5070536 / 000 / 02ORIGINAL OPERATING INSTRUCTIONS SCW 70/ WSC 7.25‑S circular saw It is essential that the operating instructions are read before the power tool is operated for the first time. Always keep these operating instructions to- gether with the power tool. Ensure that the operating instructions are with the power tool when it is given to other persons. Contents Page1 General information 142Description 153 Insert tools, accessories 174 Technical data 175 Safety instructions 186 Operation 217 Care and maintenance 248 Troubleshooting 249Disposal 2510 Manufacturer’s warranty - tools 2511 EC declaration of conformity (original) 251 These numbers refer to the corresponding illustra-tions. The illustrations can be found on the fold-out coverpages. Keep these pages open while studying the oper-ating instructions. In these operating instructions, the designation “the power tool” always refers to the SCW 70 / WSC 7.25 circular saw.Components, operating controls and indicators 1 On / off switch Auxiliary grip Drive spindle lockbutton Hexagon socket wrench Cutting angle scale Clamping lever for cutting angle adjustment Clamping screw for rip fence Clamping lever for cutting depth adjustment 45°cutting line indicator 0°cutting line indicator Parallel guide (rip fence) Pivoting guard Base plate Guard Drive spindle Mounting flange Clamping flange Clamping screw Cutting depth scale Pivoting guard operating lever Hose connector (vacuum cleaner) Cutting angle setting

LED Guide rail adapter 2 Rear retaining lug Front retaining lug 1 General information

1.1 Safety notices and their meaningDANGER

Draws attention to imminent danger that will lead to seriousbodilyinjuryorfatality. WARNINGDraws attention to a potentially dangerous situation thatcould lead to serious personal injury or fatality.CAUTIONDraws attention to a potentially dangerous situation that could lead to slight personal injury or damage to the equipment or other property. NOTE Draws attention to an instruction or other useful informa-tion.1.2 Explanation of the pictograms and otherinformationWarning signsGeneralwarningWarning:electricity

Printed: 14.05.2014 | Doc-Nr: PUB / 5070536 / 000 / 02Obligation signs Wear eye protection Wear a hard hat Wear ear protection Wear protective gloves Wear breathing protection Symbols Read the operating instructions before use Return waste material for recycling. Volts Alternating current Rated speed under no load Revolutions per minute Diameter Saw blade Location of identification data on the power tool The type designation and serial number can be found on the type identification plate on the machine or tool. Makeanoteofthisdatainyouroperatinginstructions and always refer to it when making an enquiry to your Hilti representative or service department. Type: Generation: 01/02 Serial no.: 2 Description

2.1 Use of the product as directed

The power tool is a hand-guided circular saw. The power tool is designed for cutting wood or wood-like materials, plastics, gypsum plasterboard, gypsum fiberboard and composites up to a cutting depth of approx. 70 mm and for making bevel cuts at angles between 0° and 56°. Working on materials hazardous to the health (e.g. asbestos) is not permissible. The power tool is designed for professional use and may be operated, serviced and maintained only by trained, authorized personnel. This personnel must be informed of any special hazards that may be encountered. The power tool and its ancillary equipment may present hazards when used incorrectlybyuntrainedpersonnelorwhenusednot as directed. The working environment may be as follows: construction site, workshop, renovation, conversion or new construction. The power tool may be operated only when connected to a power supply providing a voltage and frequency in compliance with the information given on its type identification plate. The use of saw blades not in compliance with the given specification (e.g. diameter, speed of rotation, thickness) or the use of cutting and grinding discs or blades made from high-alloy steel (HSS steel) is not permissible. Sawing metals is not permissible. Do not use the power tool to cut tree branches or logs. To avoid the risk of injury, use only genuine Hilti accessories and insert tools. Observe the information printed in the operating instructions concerning operation, care and maintenance. Modification of the power tool or tampering with its parts is not permissible.

Grip and auxiliary grip

2.4 Protective devices

Blade guard and pendulum-type blade guard

2.6 Items supplied as standard

Use only extension cords of a type approved for the application and with conductors of adequate cross section. The power tool may otherwise lose performance and the extension cord may overheat. Check the extension cord for damage at regular intervals. Replace damaged extension cords. Recommended minimum conductor cross section and max. cable lengths Conductor cross section

1.5 mm² 2.0 mm² 2.5 mm² 3.5 mm²

Mains voltage 110-120 V 15 m 25 m Mains voltage 220‑230 V 60 m 100 m Do not use extension cords with 1.25 mm² conductor cross section.

2.8 Using extension cords outdoors

When working outdoors, use only extension cords that are approved and correspondingly marked for this application.

2.9 Using a generator or transformer

This power tool may be powered by a generator or transformer when the following conditions are fulfilled: The unit must provide a power output in watts of at least twice the value printed on the type identification plate on the power tool. The operating voltage must remain within +5% and -15% of the rated voltage at all times, frequency must be in the 50 – 60 Hz range and never above 65 Hz, and the unit must be equipped with automatic voltage regulation and starting boost. Never operate other power tools or appliances from the generator or transformer at the same time. Switching other power tools or appliances on and off may cause undervoltage and / or overvoltage peaks, resulting in damage to the power tool.

Printed: 14.05.2014 | Doc-Nr: PUB / 5070536 / 000 / 023 Insert tools, accessories Accessories for the SCW 70 Designation Description Parallel guide (rip fence) Guide rail WGS 1400‑2B Guide rail adapter Recommended saw blade for the SCW 70 Designation Short designation Saw blade W-CSC 190x30 z24 A Recommended saw blade for the WSC 7.25-S Designation Short designation Saw blade W-CSC 7 ¹⁄₄x⁵⁄₈ t24 GP 4 Technical data Right of technical changes reserved. Rated voltage 100 V 110 V 220 V 230‑240 V Rated power input 1,430 W 1,550 W 1,700 W 1,700 W Rated current input 15 A 15 A 8.1 A 7.5 A Mains frequency 50…60 Hz 50…60 Hz 50…60 Hz 50…60 Hz NOTE This equipmentcomplies with the applicablestandardprovided that the maximum permissible mains supply impedance (Zmax) at the point where the user’s installation is connected to the public supply network is less than or equal to 0.370+j0.25 Ω. It is the responsibility of the installer or user of the equipment to ensure, by consultation with the supply network operator if necessary, that the equipment is connected only at a point in the supply with an impedance of less than or equal to Zmax. Power tool

Weight in accordance with EPTA procedure 01/2003

Cutting depth Cutting angle 0°: 67 mm Cutting angle 45°: 49 mm Cutting angle 56°: 38 mm Cutting angle 0°: 64 mm Cutting angle 45°: 47 mm Cutting angle 56°: 37 mm Speed under no load 5,800/min 5,800/min NOTE The vibration emission level given in this information sheet has been measured in accordance with a standardized test giveninEN60745andmaybeusedtocompareonetoolwithanother.Itmaybeused for a preliminary assessment

Printed: 14.05.2014 | Doc-Nr: PUB / 5070536 / 000 / 02of exposure. The declared vibration emission level represents the main applications of the tool. However if the tool is used for different applications, with different accessories or poorly maintained, the vibration emission may differ. This may significantly increase the exposure level over the total working period. An estimation of the level of exposure to vibration should also take into account the times when the tool is switched off or when it is running but not actually doing the job. This may significantly reduce the exposure level over the total working period. Identify additional safety measures to protect the operator from the effects of vibration such as: maintain the tool and the accessories, keep the hands warm, organization of work patterns. Noise and vibration information for the SCW 70 / WSC 7.25-S (measured in accordance with EN 60745-2-5): Typical A-weighted sound power level 100 dB (A) Typical A-weighted emission sound pressure level 89 dB (A) Uncertainty for the given sound level 3 dB (A) Triaxial vibration values (vibration vector sum) Sawing in wood, a

Uncertainty (K) 1.5 m/s² Other information about the power tool Protection class Protection class II (double insulated), see rating plate 5 Safety instructions

WARNING Read all safety warnings and all instructions. Fail- ure 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.

a) Keep work area clean and well lit. Cluttered or dark areas invite accidents. b) Do not operate power tools in explosive atmo- spheres, 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 operat- ing a power tool. Distractions can cause you to lose control.

5.1.2 Electrical safety

a) Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any ad- apter 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 condi- tions. 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.

5.1.3 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 turn- ing the power tool on. A wrench or a key left at-

Printed: 14.05.2014 | Doc-Nr: PUB / 5070536 / 000 / 02tached to a rotating part of the power tool may result in personal injury. e) Do not overreach. Keep proper footing and bal- ance 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.

5.1.4 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 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 chil- dren 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 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 opera- tions different from those intended could result in a hazardous situation.

a) Have your powertool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained.

5.2 Safety instructions for all saws

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 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 plat- form. It is important to support the work properly to minimize body exposure, blade binding, or loss of control. e) Hold the power tool by insulated gripping sur- faces only, 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 could give the operator an electric shock. 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 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.

5.2.2 Further safety instructions for all saws

Kickback causes and related warnings 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

Printed: 14.05.2014 | Doc-Nr: PUB / 5070536 / 000 / 02notinlinewiththeblade.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 re- move the saw from the work or pull the saw back- ward 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, centre 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 restarted. d) 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. 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 sawing into existing walls or other blind areas. The protruding blade may cut objects that can cause kickback.

5.2.3 Safety instructions for circular saws with

outer pendulum guard Lower guard function 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 “com- pound cuts.” Raise lower guard by retracting handle and as soon as blade enters the mater- ial, the lower guard must be released. For all other sawing, the lower guard should operate automatic- ally. 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.

5.3 Additional safety instructions

5.3.1 Personal safety

a) Wear ear protectors. Exposure to noise can cause hearing loss. b) Always hold the power tool securely with both hands on the grips provided. Keep the grips dry, clean and free from oil and grease. c) Breathing protection must be worn if the power tool is used without a dust removal system for work that creates dust. d) Do not operate the power tool without the pro- tective devices that belong to it. e) Operate the power tool only as intended and when it is in faultless condition. f) Improve the blood circulation in your fingers by relaxing your hands and exercising your fingers during breaks between working. g) Switch the power tool on only after bringing it into position at the workpiece. h) Always guide the power tool away from your body when working with it.

i) Do not work with the power tool overhead.

j) Do not attempt to brake the speed of the saw bladebypressingittotheside. k) Do not touch the clamping flange or the clamping screw while the power tool is running. l) The kerf must be free of obstructions. Do not saw into screws and nails etc. m) Never press the drive spindle lockbutton while the saw blade is rotating. n) Never direct the power tool toward persons. o) Children must be instructed not to play with the power tool. p) The power tool is not intended for use by children, by debilitated persons or those who have received no instruction or training. q) Adjust the pressure applied to the saw blade and the material being cut so that the blade doesn’t stall, possibly causing the power tool to kick back. r) Avoid overheating the tips of the saw blade teeth. s) When cutting plastics, melting of the plastic should be avoided. t) Before beginning the work, check thehazard clas- sification of the dust that will be produced. Use an industrial vacuum cleaner with an officially approved protection classification in compliance with locally applicable dust protection regula- tions. u) Dust from material such as paint containing lead, some wood species, minerals and metal may be harmful. Contact with or inhalation of the dust may cause allergic reactions and/or respiratory diseases to the operator or bystanders. Certain kinds of dust are classified as carcinogenic such as oak and beech dust especially in conjunction with additives for wood conditioning (chromate, wood preservative). Material

Printed: 14.05.2014 | Doc-Nr: PUB / 5070536 / 000 / 02containing asbestos must only be treated by special- ists. Where the use of a dust extraction device is possible it shall be used. To achieve a high level of dust collection, use a suitable vacuum cleaner of the type recommended by Hilti for wood dust and/or mineral dust together with this tool. Ensure that the workplace is well ventilated. The use of a dust mask of filter class P2 is recommended. Fol- low national requirements for the materials you want to work with.

5.3.2 Power tool use and care

a) Hold power tool by insulated gripping surfaces when performing an operation where the fastener may contact hidden wiring or its own cord. Fasten- ers contacting a “live” wire may make exposed metal parts of the power tool “live” and could give the operator an electric shock. b) Secure the workpiece. Use clamps or a vice to secure the workpiece. The workpiece is thus held more securely than by hand and both hands remain free to operate the power tool. c) Check that the insert tools used are compatible with the chuck system and that they are secured in the chuck correctly.

5.3.3 Electrical safety

a) Before beginning work, check the working area (e.g. using a metal detector) to ensure that no concealed electric cables or gas and water pipes are present. External metal parts of the power tool may become live, for example, when an electric cable is damaged accidentally. This presents a serious risk of electric shock. b) Always lead the supply cord and extension cord away from the power tool to the rear while work- ing. This helps to avoid tripping over the cord while working. c) Observe local safety regulations concerning con- necting the tool to a power outlet. Wherever pos- sible, connect the tool only to a power outlet equipped with an RCD circuit breaker (ground fault circuit interruptor).

a) Ensure that the workplace is well lit. b) Ensure that the workplace is well ventilated. Ex- posure to dust at a poorly ventilated workplace may result in damage to the health.

5.3.5 Personal protective equipment

The user and any other persons in the vicinity must wear suitable eye protection, a hard hat, ear protec- tion, protective gloves and breathing protection while the tool is in use.

5.3.6 Protective devices

Do not switch the power tool on if the saw blade, the blade guard or the pivoting guard are not fitted correctly. 6Operation CAUTION Wear protective gloves. The cutting edges of the saw blade teeth are sharp. The cutting edges may present a risk of injury. CAUTION Wear protective glasses and a dust mask. The sawing operation swirls up dust and wood chips into the air. The dust and wood chips may be harmful to the eyes and respiratory system. CAUTION Wear ear protectors. The power tool and the sawing operation generate noise. Exposure to noise can cause loss of hearing.

Printed: 14.05.2014 | Doc-Nr: PUB / 5070536 / 000 / 026.1 Changing the saw blade CAUTION Wear protective gloves when changing blades. The blade, the clamping flange and the clamping screw get hot. CAUTION Checkthatthebladetobefittedcomplieswiththe technical requirements and that it is well sharpened. A sharp saw blade is an essential requirement for a perfect cut.

6.1.1 Removing the saw blade 3

1. Disconnect the supply cord plug from the power

3. Turn the saw blade clamping screw with the hex.

socket wrench until the locking pin engages fully.

4. Use the hex. socket wrench to release the clamping

screw by turning it counterclockwise.

5. Removethe clamping screw from the outer clamping

6. Open the pivoting guard by swinging it to the side

and then remove the saw blade.

6.1.2 Fitting the saw blade

1. Disconnect the supply cord plug from the power

2. Clean the mounting flange and the clamping flange.

3. Fit the mounting flange.

row on the saw blade. Fit the new saw blade.

6. Fit the outer clamping flange.

7. Secure the clamping flange by tightening the clamp-

ing screw in a clockwise direction. When doing so, pressthespindlelockbuttonasbefore(see“Re- moving the blade”).

8. Before using the power tool, check that the saw

blade is securely attached.

6.2 Adjusting the cutting depth 4

NOTE The cutting depth should always be set to a depth approx. 5 to 10 mm greater than the thickness of the material to be cut. The cutting depth can be adjusted stepplessly between 0 and approx. 70 mm.

1. Disconnect the supply cord plug from the power

2. Place the power tool on a supporting surface.

3. Release the cutting depth adjustment clamping lever

The set cutting depth is indicated by the arrow on the scale on the gear housing.

4. Lift the power tool in a scissor movement and set

the desired cutting depth by closing the clamping lever.

6.3 Adjusting the cutting angle 5

The saw can be set to any angle between 0 and 56º for bevel cuts.

1. Disconnect the supply cord plug from the power

2. Release the cutting angle adjustment clamping

3. Pivot the base plate to the 0° position.

4. Set the preset angle indicator to the desired angle.

5. Pivot the base plate as far as it will go.

6. Tighten the cutting angle adjustment clamping lever.

1. Disconnect the supply cord plug from the power

2. Release the cutting angle adjustment clamping

3. Pivot the base plate to the desired angle setting.

4. Tighten the cutting angle adjustment clamping lever.

6.4 Sawing along a line

There is a cutting line indicator for straight cuts or bevel cuts (0° and 45°) at the front section of the base plate of the power tool. This permits precise cuts to be made at the selected cutting angle. The edge of the line indicator corresponds to the inside of the saw blade. There is a cutting line indicator at the opening for the saw blade at the front end of the base plate.

1. Secure the workpiece so that it cannot move.

2. Position the workpiece so that the saw blade is free

to move under the workpiece.

3. Check to ensure that the switch on the power tool

is in the off-position.

4. Plug the supply cord into the power outlet.

5. Place the power tool with the base plate on the

workpiece in such a way that the blade still has no contact with the workpiece.

6. Press the on / off switch.

7. Guide the power tool along the cutting line on the

workpiece at a suitable speed.

6.5 Sawing with the parallel guide (rip fence)

The parallel guide (rip fence) can be used to make accur- atecutsalongtheedgeofaworkpieceortocutstripsof equal width.

1. Disconnect the supply cord plug from the power

3. Set the desired cutting width.

4. Tighten the clamping screw.

6.7 Using the saw on the guide rail 7

NOTE Using the saw on the guide rail can reduce the risk of kickback.

1. Remove the rip fence, if one is fitted.

2. Fit the front edge of the base plate into the front

retaining lugs on the guide rail adapter.

3. Swing the rear edge of the base plate down fully

into the guide rail adapter. The base plate must engage fully with the rear retaining lug.

4. To remove the tool, pull the rear retaining lug back

slightly and lift the tool up out of the guide rail adapter.

6.7.2 Longitudinal cuts at 0 °

Place the saw on the guide rail so that the rib fits into the groove in the adapter.

6.7.3 Longitudinal cuts at up to 56 °

Guide the saw so that the outer edge of the guide rail adapter runs along the rib on the guide rail. The saw blade will otherwise come into contact with the guide rail.

6.7.4 Cuts at an angle across the surface of the

workpiece NOTE The cutting angle indicated is the angle of deviation from a straight, right-angled cut.

1. Position the guide rail with the zero mark at the edge

of the workpiece and then pivot the rail until the desired angle shown on the angle scale is opposite the zero mark.

2. Use the two screw clamps to secure the guide rail.

6.8 Trimming to size

1. Secure the guide rail from below with two screw

clamps. NOTE The saw must be placed on the guide rail behind the workpiece.

2. CAUTION Take care to ensure that the saw blade

is not in contact with the workpiece. Position the saw on the guide rail a short distance from the starting point of the cut.

3. Switch the power tool on.

4. Push the saw steadily across the workpiece.

The pendulum guard opens as it contacts the ac- tuating edge at the side of the guide rail and sub- sequently closes at the end of the rail as the cut is completed.

6.9 Cleaning the chip ejector channel 8

CAUTION Ensure that the power tool is disconnected from the electric supply.

1. Remove the screw at the rear underside of the

guard and then remove the vacuum cleaner hose connector.

2. Clean the chip deflector and hose connector.

3. Refit the hose connector to the chip deflector and

secure it with the screw.

4. Check for misalignment or binding of moving parts,

breakage of parts and any other condition that may affect the power tool’s operation.

6.10 Using the saw with a dust and chip removal

system NOTE The circular saw is equipped with a hose connector suitable for use with conventional vacuum cleaner hoses with a diameter of 27 mm. In order to connect the vacuum cleaner hose to the saw, use of a suitable adapter may be necessary. CAUTION Dusts are hazardous to the health and can cause respir- atory or skin diseases and allergic reactions. WARNING Certain dusts are considered to be carcinogenic (cause cancer). These include mineral dust as well as oak and/or beech wood dust, particularly in conjunction with addi- tional substances used for the treatment of wood (chro- mate, wood preservatives). CAUTION Wherever possible, use a suitable mobile vacuum dust removal system such as the WVC 40‑M (wood) or VCU 40‑M (wood and mineral materials) for the application concerned. Use a respiratory protector of the P2 filter class with half-mask facepiece if no dust removal system is available or its use is impossible. In addition, to keep the concentration of dust low, always ensure good ventilation. CAUTION Commercial and industrial users must consult the re- sponsible trade association toclarifythesituationre- garding special requirements applicable to working on other materials.

Printed: 14.05.2014 | Doc-Nr: PUB / 5070536 / 000 / 026.11 Using the saw without a dust and chip removal system NOTE A rotatable chip ejector is available as an accessory. Turn the nozzle to the desired direction of ejection so that thechipsanddustaredeflectedawayfromyou. 7 Care and maintenance CAUTION Ensure that the power tool is disconnected from the electric supply.

7.1 Care of saw blades

Clean off dirt and dust deposits adhering to the blades and protect them from corrosion by wiping from time to time with an oil-soaked rag.

7.2 Care of the power tool

CAUTION Keep the power tool, especially its grip surfaces, clean and free from oil and grease. Do not use clean- ing agents which contain silicone. The outer casing of the power tool is made from impact- resistant plastic. Sections of the grip are made from a synthetic rubber material. Never operate the power tool when the ventilation slots are blocked. Clean the ventilation slots carefully using a dry brush. Do not permit foreign objects to enter the interior of the power tool. Clean the outside of the power tool at regular intervals with a slightly damp cloth. Do not use a spray, steam pressure cleaning equipment or running water for cleaning. This may negatively affect the electrical safety of the power tool.

7.3 Cleaning the safety devices

1. Remove the saw blade before cleaning the safety

2. Clean the safety devices carefully with a dry brush.

3. Useasuitabletooltoremovedepositsorwood

chips from the inside surfaces of the safety devices.

4. Fit the saw blade.

WARNING Repairs to the electrical section of the power tool may be carried out only by trained electrical specialists. CAUTION If the power tool’s supply cord is damaged it must be replaced with a specially-prepared supply cord available from Hilti Customer Service. Check all external parts of the power tool for damage at regular intervals and check that all controls operate faultlessly. Do not operate the power tool if parts are damaged or when the controls do not function faultlessly. Have the power tool repaired by Hilti Service.

7.5 Checking the power tool after care and

maintenance After carrying out care and maintenance work on the power tool, check that all protective and safety devices are fitted and that they function faultlessly. To check the pivoting guard, open the guard fully by moving the guard operating lever. The pivoting guard must close quickly and completely when the guard operating lever is released. 8 Troubleshooting Fault Possible cause Remedy The power tool doesn’t achieve full power. The extension cord is too long or its gauge is inadequate. Use an extension cord of an approved length and / or of adequate gauge. The voltage provided by the electric supply is too low. Connect the power tool to a different power source. The power tool doesn’t start. Interruption in the electric supply. Plug in another electric appliance and check whether it works. The supply cord or plug is defective. Have it checked by a trained electrical specialist and replaced if necessary. The on / off switch is defective. Have it checked by a trained electrical specialist and replaced if necessary.

Printed: 14.05.2014 | Doc-Nr: PUB / 5070536 / 000 / 02Fault Possible cause Remedy The power tool doesn’t start. The carbon brushes are worn. Have it checked by a trained electrical specialist and replaced if necessary. No / reduced suction power. Chip ejector channel blocked. Clean out the chip ejector channel. 9 Disposal Most of the materials from which Hilti power tools or appliances are manufactured can be recycled. The materials must be correctly separated before they can be recycled. In many countries, Hilti has already made arrangements for taking back your old power tools or appliances for recycling. Please ask your Hilti customer service department or Hilti representative for further information. For EC countries only Disposal of electric tools together with household waste is not permissible. In observance of the European Directive on waste electrical and electronic equipment and its imple- mentation in accordance with national law, electrical appliances that have reached the end of their life must be collected separately and returned to an environmentally compatible recycling facility. 10 Manufacturer’s warranty - tools Please contact your local Hilti representative if you have questions about the warranty conditions. 11 EC declaration of conformity (original) Designation: Circular saw Type: SCW 70/ WSC 7.25‑S Generation: 01/02 Year of design: 2011 We declare, on our sole responsibility, that this product complies with the following directives and standards: 2004/108/EC, 2006/42/EC, 2011/65/EU, EN 60745‑1, EN 60745‑2‑5, EN ISO 12100. Hilti Corporation, Feldkircherstrasse 100, FL‑9494 Schaan Paolo Luccini Jan Doongaji Head of BA Quality and Process Man- agementExecutive Vice President Business Area Electric Tools & Ac- cessoriesBusiness Unit PowerTools & Accessories01/2012 01/2012 Technical documentation filed at: Hilti Entwicklungsgesellschaft mbH Zulassung Elektrowerkzeuge Hiltistrasse 6 86916 Kaufering Deutschland

6. Pressione o interruptor on/off.