GKS 55 - Saw BOSCH - Free user manual and instructions

USER MANUAL GKS 55 BOSCH

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GKS 55 + GCE OBJ_BUCH-2175-001.book Page 3 Friday, August 1, 2014 2:12 PM1 609 92A 0LU | (1.8.14) Bosch Power Tools 4 |

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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. Do not reach underneath the workpiece. The guard can- not protect you from the blade below the workpiece. 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. Never hold piece being cut in your hands or across your leg. Secure the workpiece to a stable platform. It is im- portant to support the work properly to minimize body ex- posure, blade binding, or loss of control. Hold the power tool by insulated gripping surfaces on- ly, 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. When ripping, always use a rip fence or straight edge guide. This improves the accuracy of cut and reduces the chance of blade binding. 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 eccentri- cally, causing loss of control. 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 opera- tion. 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 oper- ating procedures or conditions and can be avoided by tak- ing proper precautions as given below. Maintain a firm grip with both hands on the saw and po- sition 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 back- wards, but kickback forces can be controlled by the opera- tor, if proper precautions are taken. When blade is binding, or when interrupting a cut for any reason, release the trigger and hold the saw mo- tionless in the material until the blade comes to a com- plete stop. Never attempt to remove the saw from the work or pull the saw backward while the blade is in mo- tion or kickback may occur. Investigate and take correc- tive actions to eliminate the cause of blade binding. When restarting a saw in the workpiece, centre the saw blade in the kerf and check that saw teeth are not en- gaged into the material. If saw blade is binding, it may walk up or kickback from the workpiece as the saw is re- started. 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 pan- el on both sides, near the line of cut and near the edge of the panel. Do not use dull or damaged blades. Unsharpened or im- properly set blades produce narrow kerf causing excessive friction, blade binding and kickback. 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. Use extra caution when sawing into existing walls or other blind areas. The protruding blade may cut objects that can cause kickback. Lower guard function 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. 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. The lower guard may be retracted manually only for special cuts such as “plunge cuts and angle cuts”. Raise the lower guard by retracting the handle and as soon as the blade enters the material, release the lower guard. For all other sawing operations, the lower guard should op- erate automatically. Always observe that the lower guard is covering the blade before placing saw down on bench or floor. An un- protected, coasting blade will cause the saw to walk back- wards, cutting whatever is in its path. Be aware of the time it takes for the blade to stop after switch is released. Additional safety warnings Do not reach into the chip ejector with your hands. They could be injured by rotating parts. Do not work overhead with the saw. In this manner you do not have sufficient control over the power tool. OBJ_BUCH-2175-001.book Page 15 Friday, August 1, 2014 2:12 PM16 | English 1 609 92A 0LU | (1.8.14) Bosch Power Tools Use suitable detectors to determine if utility lines are hidden in the work area or call the local utility company for assistance. Contact with electric lines can lead to fire and electric shock. Damaging a gas line can lead to explo- sion. Penetrating a water line causes property damage or may cause an electric shock. Do not operate the power tool stationary. It is not de- signed for operation with a saw table. Do not use high speed steel (HSS) saw blades. Such saw blades can easily break. Do not saw ferrous metals. Red hot chips can ignite the dust extraction. When working with the machine, always hold it firmly with both hands and provide for a secure stance. The power tool is guided more secure with both hands. Secure the workpiece. A workpiece clamped with clamp- ing devices or in a vice is held more secure than by hand. Always wait until the machine has come to a complete stop before placing it down. The tool insert can jam and lead to loss of control over the power tool. Products sold in GB only: Your product is fitted with a BS 1363/A approved electric plug with internal fuse (ASTA approved to BS 1362). If the plug is not suitable for your socket outlets, it should be cut off and an appropriate plug fitted in its place by an author- ised customer service agent. The replacement plug should have the same fuse rating as the original plug. The severed plug must be disposed of to avoid a possible shock hazard and should never be inserted into a mains sock- et elsewhere. Products sold in AUS and NZ only: Use a residual current de- vice (RCD) with a rated residual current of 30 mA or less. Product Description and Specifica- tions Read all safety warnings and all instruc- tions. Failure to follow the warnings and in- structions may result in electric shock, fire and/or serious injury. Intended Use The machine is intended for lengthways and crossways cut- ting of wood with straight cutting lines as well as mitre cuts in wood while resting firmly on the workpiece. With suitable saw blades, thin-walled non-ferrous metals, e. g., profiles, can al- so be sawed. Working ferrous metals is not permitted. Product Features The numbering of the product features refers to the illustra- tion of the machine on the graphics page. 1 Thumbwheel for speed preselection (GKS 55+ GCE) 2 On/Off switch 3 Lock-off button for On/Off switch 4 Hex key 5 Spindle lock button 6 Scale for mitre angle 7 Wing bolt for parallel guide 8 Wing bolt for bevel-angle preselection 9 Cutting mark, 45° 10 Cutting mark, 0° 11 Parallel guide* 12 Retracting blade guard 13 Lever for retracting blade guard 14 Base plate 15 Wing bolt for bevel-angle preselection (GKS 55+ G/GKS 55+ GCE) 16 Chip ejector 17 Blade guard 18 Handle (insulated gripping surface) 19 Auxiliary handle (insulated gripping surface) 20 Clamping bolt with washer 21 Clamping flange 22 Saw blade* 23 Mounting flange 24 Saw spindle 25 Fastening screw for extraction adapter* 26 Extraction adapter* 27 Clamping lever for cutting-depth preselection 28 Cutting-depth scale 29 Set of screw clamps** 30 Guide rail* 31 Vacuum hose* 32 Connection piece* *Accessories shown or described are not part of the standard de- livery scope of the product. A complete overview of accessories can be found in our accessories program. **Commercially available (not included in the delivery scope) OBJ_BUCH-2175-001.book Page 16 Friday, August 1, 2014 2:12 PMEnglish | 17 Bosch Power Tools 1 609 92A 0LU | (1.8.14) Technical Data Noise/Vibration Information The vibration level given in this information sheet has been measured in accordance with a standardised test given in EN 60745 and may be used to compare one tool with anoth- er. It may be used for a preliminary assessment of exposure. The declared vibration emission level represents the main ap- plications of the tool. However if the tool is used for different applications, with different accessories or insertion tools or is 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 sig- nificantly 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, organisation of work pat- terns. Circular Saw GKS 165 GKS 55+ G GKS 55+ GCE Article number 3 601 F76 1.. 3 601 F82 0.. 3 601 F82 1.. Rated power input W 1100 1200 1350 No-load speed min

Spindle lock Speed preselection

Constant electronic control

Reduced starting current

(triax vec- tor sum) and uncertainty K deter- mined according to EN 60745: Sawing wood:

OBJ_BUCH-2175-001.book Page 17 Friday, August 1, 2014 2:12 PM18 | English 1 609 92A 0LU | (1.8.14) Bosch Power Tools Declaration of Conformity We declare under our sole responsibility that the product de- scribed under “Technical Data” is in conformity with all rele- vant provisions of the directives 2011/65/EU, 2014/30/EU, 2006/42/EC including their amendments and complies with the following standards: EN 60745-1, EN 60745-2-5. Technical file (2006/42/EC) at: Robert Bosch GmbH, PT/ETM9, 70764 Leinfelden-Echterdingen, GERMANY Robert Bosch GmbH, Power Tools Division 70764 Leinfelden-Echterdingen, GERMANY

Assembly Mounting/Replacing the Saw Blade Before any work on the machine itself, pull the mains plug. When mounting the saw blade, wear protective gloves. Danger of injury when touching the saw blade. Only use saw blades that correspond with the charac- teristic data given in the operating instructions. Do not under any circumstances use grinding discs as the cutting tool. Selecting a Saw Blade An overview of recommended saw blades can be found at the end of this manual. Removal of the Saw Blade (see figure A) For changing the cutting tool, it is best to place the machine on the face side of the motor housing. – Press the spindle lock button 5 and keep it pressed. The spindle lock button 5 may be actuated only when the saw spindle is at a standstill. Otherwise, the power tool can be damaged. – With the Hex key 4, unscrew the clamping bolt 20 turning in rotation direction . – Tilt back the retracting blade guard 12 and hold firmly. – Remove the clamping flange 21 and the saw blade 22 from the saw spindle 24. Mounting the Saw Blade (see figure A) For changing the cutting tool, it is best to place the machine on the face side of the motor housing. – Clean the saw blade 22 and all clamping parts to be assem- bled. – Tilt back the retracting blade guard 12 and hold firmly. –Place the saw blade 22 on to the mounting flange 23. The cutting direction of the teeth (direction or arrow on saw blade) and the direction-of-rotation arrow on the blade guard 17 must correspond. –Mount the clamping flange 21 and screw in the clamping bolt 20 turning in rotation direction . Observe correct mounting position of mounting flange 23 and clamping flange 21. – Press the spindle lock button 5 and keep it pressed. –With the Hex key 4, tighten the clamping bolt 20 turning in rotation direction . The tightening torque is between 6–9 Nm, which corresponds to hand tight plus ¼ turn. Dust/Chip Extraction Before any work on the machine itself, pull the mains plug. Dusts from materials such as lead-containing coatings, some wood types, minerals and metal can be harmful to one’s health. Touching or breathing-in the dusts can cause allergic reactions and/or lead to respiratory infections of the user or bystanders. Certain dusts, such as oak or beech dust, are considered as carcinogenic, especially in connection with wood-treat- ment additives (chromate, wood preservative). Materials containing asbestos may only be worked by specialists. – As far as possible, use a dust extraction system suitable for the material. – Provide for good ventilation of the working place. – It is recommended to wear a P2 filter-class respirator. Observe the relevant regulations in your country for the mate- rials to be worked. Prevent dust accumulation at the workplace. Dusts can easily ignite. Mounting the Extraction Adapter (see figure B) – Attach the extraction adapter 26 onto the chip ejector 16 until it latches. Secure the extraction adapter 26 addition- ally with the screw 25. A vacuum hose with a diameter of 35 mm can be connect- ed to the extraction adapter 26. The extraction adapter may not be mounted when no external dust extraction is connected. Otherwise the ex- traction channel can become clogged. Do not connect a dust bag to the extraction adapter. Otherwise the extraction system can become clogged. To ensure optimum extraction, the extraction adapter 26 must be cleaned regularly. External Dust Extraction Connect the vacuum hose 31 to a vacuum cleaner (accesso- ry). An overview for connecting to various vacuum cleaners can be found at the end of this manual. The machine can be plugged directly into the receptacle of a Bosch all-purpose vacuum cleaner with remote starting con- trol. The vacuum cleaner starts automatically when the ma- chine is switched on. The vacuum cleaner must be suitable for the material being worked. When vacuuming dry dust that is especially detrimental to health or carcinogenic, use a special vacuum cleaner. Henk Becker Executive Vice President Engineering Helmut Heinzelmann Head of Product Certification PT/ETM9 OBJ_BUCH-2175-001.book Page 18 Friday, August 1, 2014 2:12 PMEnglish | 19 Bosch Power Tools 1 609 92A 0LU | (1.8.14) Operation Operating Modes Before any work on the machine itself, pull the mains plug. Adjusting the Cutting Depth (see figure 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. – Loosen the clamping lever 27. For a smaller cutting depth, pull the saw away from the base plate 14; for a larger cut- ting depth, push the saw toward the base plate 14. Adjust the desired cutting depth at the cutting-depth scale. Tight- en the clamping lever 27 again. – If the cutting depth cannot be fully adjusted after loosening clamping lever 27, pull clamping lever 27 away from the saw and swivel it downward. Release the clamping lever 27 again. Repeat this procedure until the requested cut- ting depth can be adjusted. – If the cutting depth cannot be sufficiently locked after tightening clamping lever 27, pull clamping lever 27 away from the saw and swivel it upward. Release the clamping lever 27 again. Repeat this procedure until the cutting depth is locked. Adjusting the Cutting Angle (GKS 55+ G/GKS 55+ GCE) It is best to place the machine on the face side of the blade guard 17. – Loosen the wing bolts 8 and 15. Tilt the saw sidewards. Adjust the desired measure on the scale 6. Tighten the wing bolts 8 and 15 again. Note: For bevel cuts, the cutting depth is smaller than the set- ting indicated on the cutting-depth scale 28. Adjusting the Cutting Angle (GKS 165) It is best to place the machine on the face side of the blade guard 17. – Loosen wing bolt 8. Tilt the saw sidewards. Adjust the de- sired setting at the scale 6. Tighten wing bolt 8 again. Note: For bevel cuts, the cutting depth is smaller than the set- ting indicated on the cutting-depth scale 28. Cutting Marks The 0° cutting mark 10 indicates the position of the saw blade for right-angled cuts. The 45° cutting mark 9 indicates the po- sition of the saw blade for 45° cuts. – For precise cuts, position the circular saw against the workpiece as shown in the figure. It is best to carry out a tri- al cut. Starting Operation Observe correct mains voltage! The voltage of the pow- er source must agree with the voltage specified on the nameplate of the machine. Power tools marked with 230 V can also be operated with 220 V. Switching On and Off –To start the machine, first push the lock-off button for the On/Off switch 3 and then press the On/Off switch 2 and keep it pressed. –To switch off the machine, release the On/Off switch 2. Note: For safety reasons, the On/Off switch 2 cannot be locked; it must remain pressed during the entire operation. Speed preselection (GKS 55+ GCE) The required speed can be preselected with the thumbwheel 1 (also while running). The required speed depends on the saw blade being used and on the material being worked (see overview of saw blades at the end of these operating instructions). Run-on Brake (GKS 55+ G/GKS 55+ GCE) An integrated run-on brake reduces the run-on period of the saw blade after switching off the machine. Reduced starting current (GKS 55+ GCE) The electronic reduced starting current limits the power con- sumption when switching the tool on and enables operation from a 13 ampere fuse. Constant Electronic Control (GKS 55+ GCE) Constant electronic control holds the speed constant at no- load and under load, and ensures uniform working perfor- mance. Working Advice Protect saw blades against impact and shock. Guide the machine evenly and with light feed in the cutting di- rection. Excessive feed significantly reduces the service life of the saw blade and can cause damage to the power tool. Sawing performance and cutting quality depend essentially on the condition and the tooth form of the saw blade. There- fore, use only sharp saw blades that are suited for the material to be worked. Sawing Wood The correct selection of the saw blade depends on the type and quality of the wood and whether lengthway or crossway cuts are required. When cutting spruce lengthways, long spiral chips are formed. Beech and oak dusts are especially detrimental to health. Therefore, work only with dust extraction.

OBJ_BUCH-2175-001.book Page 19 Friday, August 1, 2014 2:12 PM20 | English 1 609 92A 0LU | (1.8.14) Bosch Power Tools Sawing Non-ferrous Metals Note: Use only a sharp saw blade that is suitable for non-fer- rous metals. This ensures a clean cut and prevents blade bind- ing. Guide the switched on power tool against the workpiece and carefully start the cut. Continue the cut with low feed and without interruption. When sawing profiles, always begin the cut from the narrow side; when sawing U-profiles, never start the cut from the open side. Support long profiles in order to avoid blade bind- ing and kickback of the power tool. Sawing with Parallel Guide (see figure D) The parallel guide 11 enables exact cuts along a workpiece edge and cutting strips of the same dimension. – Loosen wing bolt 7 and slide the scale of the parallel guide 11 through the guide in the base plate 14. Adjust the de- sired cutting width as the scale setting at the respective cutting mark 10 or 9; see Section “Cutting Marks”. Tighten wing bolt 7 again. Sawing with Auxiliary Guide (see figure E) For sawing large workpieces or straight edges, a board or strip can be clamped to the workpiece as an auxiliary guide; the base plate of the circular saw can be guided alongside the auxiliary guide. Sawing with Guide Rail (GKS 55+ G/GKS 55+ GCE) (see figure F) The guide rail 30 is used to carry out straight cuts. The rubber lip on the guide rail acts as a splinter guard; it pre- vents fraying of the surface while sawing wooden materials. For this, the teeth of the saw blade must face directly against the rubber lip. Prior to the very first cut, the rubber lip must be adapted with the guide rail 30 to the circular saw being used. For this, place the guide rail 30 over its complete length on a workpiece. Ad- just a cutting depth of approx. 9 mm and the saw blade to a ze- ro degree angle. Switch the circular saw on and guide it uni- formly and with light feed in the cutting direction. Two guide rails can be connected using the connection piece

32. Clamping is carried out with the four screws located in the

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(GKS 55+ G / GKS 55+ GCE) (GKS 55+ GCE)

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