Write a safe work procedure for Hand held electric jig saw

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# Powered Hand Tools - Saws - Sabre, Jig and Reciprocating (cont.) ## What should you do to work with powered hand saws safely? (cont.) - Set the blade to go no further than 0.32 to 0.64 cm (1/8 to 1/4 inch) deeper than the material being cut. - Do not start cutting until the saw reaches its full power. - Do not force a saw along or around a curve. Allow the machine to turn with ease. - Do not insert a blade into or withdraw a blade from a cut or lead hole while the blade is moving. - Do not put down a saw until the motor has stopped. - Do not reach under or around the stock being cut. - Maintain control of the saw always. Avoid cutting above shoulder height. ## How should you start an external cut? - Place the front of the shoe on the stock. - Make sure that the blade is not in contact with the material or the saw will stall when the motor starts. - Hold the saw firmly down against the material and switch the saw on. - Feed the blade slowly into the stock maintaining an even forward pressure. Blade (should not touch material before the saw is turned on) Clearance (of bench or Rest Front Shoe other support) on material Clamp (or otherwise secure the material firmly in place). ## How should you start an inside cut? - Drill a lead hole slightly larger than the saw blade. With the saw switched off, insert the blade in the hole until the shoe rests firmly on the stock. - Do not let the blade touch the stock until the saw has been switched on. Powered Hand Tools - Saws - Sabre, Jig and Reciprocating CCOHS

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# Portable jigsaw Handheld jigsaws are useful for cutting intricate curves and patterns in thin stock. They have thin blades that move rapidly up and down through the saw's guide plate. The blade is held in a chuck. The operator either holds the saw with one hand while the other hand is used to secure the stock, or the saw is held with both hands if the stock is already secured. ## Hazard Serious cuts can occur when the operator contacts the reciprocating blade. Much of the blade is exposed by design. ## Solution Ensure the portion of the blade above the guide plate is adequately guarded. This may require setting it to an appropriate height. Secure the work piece and use two hands whenever possible. Be aware of the portion of the blade below the stock, especially if you are using one hand to secure the material. Make turns slowly and use a narrow blade for sharp turns. ## References ## General Industry • Oregon OSHA Division 2/Subdivision P, 1910.243 • ANSI/UL 45, Portable Electric Tools ## Construction • Oregon OSHA Division 3/Subdivision I, 1926.300 ## Agriculture • Oregon OSHA Division 4/Subdivision P, 437- 004-2230 28

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OSHA FactSheet CONTROL SILICA DUST Breathe Easier # CONTROL OF SILICA DUST IN CONSTRUCTION Handheld Power Saws Using a handheld power saw (also called a cut-off saw) to cut masonry, concrete, stone, or other silica-containing materials can generate respirable crystalline silica dust. When inhaled, the small particles of silica can irreversibly damage the lungs. This fact sheet describes dust controls that can be used to minimize the amount of dust that gets into the air when using handheld power saws with an integrated water delivery system as listed in Table 1 of the Respirable Crystalline Silica Standard for Construction, 29 CFR 1926.1153. This fact sheet does not apply to handheld saws used to cut fiber-cement board. ## Engineering Control Method: Water applied continuously to the saw blade ## Wet Cutting Many handheld power saws come equipped with an integrated water delivery system designed to cool the blade by directing a continuous stream of water onto the blade where it wets the material being cut and reduces the amount of dust generated when cutting. Water can be supplied to the saw by either a pressurized container or by a constant water supply such as a hose connected to a faucet or construction site water supply. Water flow rates must be sufficient to minimize release of visible dust. Photo courtesy of OSHA The saw must be operated and maintained in accordance with manufacturer's instructions to minimize dust emissions. Focus on the following areas: • Check that hoses are securely connected and are not cracked or broken. . Adjust nozzles so that water goes to the blade and wets the cutting area. - Inspect the saw blade before use to be sure it is in good condition and does not show excessive wear. - Maintain and operating the saw's dust-control equipment based on the manufacturer's instructions. Clean up any slurry produced to prevent the slurry from drying and releasing silica dust into the air. Wet slurry can be cleaned up using, for ex…

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# Electric tools-Sabre saws ## Explain dangers Sabre saws (also known as portable jigsaws) are used to cut holes in ceilings, floors, and walls and to make short, straight cuts. The sabre saw cuts on the upstroke only. A reciprocating saw is a heavier type of sabre saw with a larger and more rugged blade. It must be held with both hands to absorb vibration and to avoid accidental contact. Be aware of the following hazards when using a sabre saw: - If you don't use a sabre saw correctly, it can kick back, injuring you and damaging materials. - If you don't check out what's behind your work, you could also saw into wires, cables, or pipes. - Don't use this saw for continuous or heavy cutting. Use a circular saw. ## Identify controls - Wear eye protection. You should wear safety glasses with side shields. Even better are goggles for dust or a face shield. • Use two hands on the saw to maintain control, absorb vibration, and avoid accidental contact. • Always make sure you know what's on the other side of the surface being cut. Beware of sawing into wires, cables, and pipes. • Make sure that the saw will clear the bench, trestle, or other support. . Use clamping material. It is not only safe but also reduces vibration and makes cutting more accurate. . Don't start cutting if the blade is in contact with the work. Let the saw reach full power before it touches the work. - Hold the base or shoe of the saw in firm contact with the work. This keeps the blade cutting straight up and down and prevents it from twisting or breaking. - Keep your free hand away from the front of the saw. • Never reach under, around, or behind the material being cut. • Don't try to make inside or pocket cuts without first drilling a lead hole. - When the motor is running, working a blade in or out of a cut or lead hole can cause kickback. • Let the saw and the blade do most of the work. Don't force the saw. The machine should turn with ease. If you have to push the …

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CCOHS CCHST Canadian Centre for Occupational Health and Safety Centre canadien d'hygiène et de sécurité au travail Powered Hand Tools # Powered Hand Tools - Saws - Circular ## On this page What should you do before start cutting with a circular saw? What should you do to work safely. with a circular saw? What should you avoid when cutting with a circular saw? ## What should you do before start cutting with a circular saw? - Wear safety glasses or goggles, or a face shield (with safety glasses or goggles). - Wear an approved respirator or dust mask when exposed to harmful or nuisance dusts. - Use appropriate hearing protection equipment in noisy areas. - Check the retracting lower blade guard to make certain it works freely. - Check the blade for any signs of damage. Do not use a blade that is damaged, warped or bent. - Ensure that the blade that you have selected is sharp enough to do the job. Sharp blades work better and are safer. - Check the saw for proper blade rotation. - While the saw is unplugged or the battery has been removed, set the blade's depth and lock it at a depth so that the lowest tooth does not extend more than about 0.3 cm (1/8") beneath the wood. - Keep all cords clear of the cutting area. - Circular saws are designed for right-hand operation; left-handed operation will demand more care to operate safely. What should you do to work safely with a circular saw? Powered Hand Tools - Saws - Circular CCOHS

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CCOHS CCHST Canadian Centre for Occupational Health and Safety * Centre canadien d'hygiène et de sécurité au travail Powered Hand Tools # Powered Hand Tools - Saws - Sabre, Jig and Reciprocating ## On this page What should you do before start cutting with powered hand saws? What should you do to work with powered hand saws safely? How should you start an external cut? How should you start an inside cut? ## What should you do before start cutting with powered hand saws? - Wear safety glasses or goggles, or a face shield (with safety glasses or goggles). - Disconnect power supply before changing or adjusting blades. - Use lubricants when cutting metals. - Keep all cords clear of cutting area. - Position the saw beside the material before cutting and avoid entering the cut with a moving blade. - Make sure guards, if present, are installed and are working properly. ## What should you do to work with powered hand saws safely? - Hold reciprocating saw with both hands. - Remember sabre saws cut on the up stroke. - Secure and support stock as close as possible to the cutting line to avoid vibration. - Keep the base or shoe of the saw in firm contact with the stock being cut. - Select the correct blade for the material being cut and allow it to cut steadily. Do not force it. Clean and sharp blades operate best. Powered Hand Tools - Saws - Sabre, Jig and Reciprocating CCOHS

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# What is a hazard? (cont.) A hazard is usually described by stating the condition and the injury or illness a person can suffer from contact with the hazard. For example, ## Condition ## Injury/illness resulting from contact with hazard • operating a table saw without a guard on the blade → exposed to a cut or amputation hazard • working near a noisy machine -> exposed to a hearing loss hazard • walking on a second floor balcony without a guardrail at the edge → exposed to a fall hazard Several conditions taken together may create a hazard: • (1) operating a table saw that has a guard on the blade, (2) but is talking with a co-worker while cutting wood → exposed to cut or amputation hazard A potential hazard usually involves a condition that can reasonably be predicted to occur. For example, - If one or more bolts holding a table saw blade guard in place are loose or missing, then the guard may fall off, exposing an employee to injury. A potential exposure exists when it is reasonably predictable that an employee could be exposed to the hazard. For example, - Does an employee's expected work pattern, travel, or simple presence in an area pose a danger? - - Has anything been done to prevent access to hazardous equipment that someone may use? 32 37 37

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# Hand-held masonry saws 2 ## Explain dangers Hand-held masonry saws are high-powered tools that can cause serious injuries. - The blade of the saw operates at high speeds. Kickback can occur if the blade becomes wedged and the force sends the rotating blade back towards the operator. - The saw is extremely loud and produces a lot of vibration. - Gasoline-powered saws release carbon monoxide (CO). In addition, spilled or leaking fuel combined with the sparks produced during cutting can cause a fire. - Cutting concrete and masonry materials can expose the operator to toxic dusts (e.g., silica), which can cause respiratory problems. It also produces flying particles that can strike the eye. - When cutting metal, the sparks produced can cause a fire and the metal filings can become airborne and strike someone. - A saw that is left idling may bounce around or fall, causing injury or damage. ## Identify controls ## STARTING THE SAW . Keep others at least six feet away from you. Place the saw on solid ground and secure it with one foot in the rear handle. . Grasp the top handle with one hand and set the throttle lock. Pull the recoil handle towards your chest. - Never "drop start" or "throw start" a saw. This leaves only one hand to control it. . Don't let the pull cord snap back. ## OPERATING THE SAW • Before operating the saw, complete a hazard assessment of the work area and locate buried cables or covered electrical services so they can be avoided. • Hold the saw firmly with both hands and plant your feet firmly in a wide stance before starting to cut. - Stand to the left of the saw and hold your left arm straight. Activate the throttle with your right hand. (Reverse for left-handed saws.) - To prevent kickback, never let the upper quarter of the blade contact the material. Do not cut above waist height and cut only one item at a time. - Let the abrasive edges of the blade and power of the engine to do the cutting. Don't force it. - Bring the…

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# What should you do before using powered hand tools? (cont.) - Recharge a battery-powered tool only with a charger specifically intended for that tool's battery. See the OSH Answers on Battery Charging - Lithium-lon Batteries for more information. - Remove the battery from the tool or ensure the tool is switched off or locked off before changing accessories, making adjustments, or storing the tool. - Store a battery pack safely so that no metal parts, nails, screws, wrenches, etc. can come in contact with the battery terminals; this could result in shorting the battery and possibly cause sparks, fires or burns. ## What should you do while using powered hand tools? - Wear or use personal protective equipment (PPE) or clothing that is appropriate for the work you are doing; this may include items such as safety glasses or goggles, or a face shield (with safety glasses or goggles), hearing protection, respiratory protection, gloves, safety boots or shoes, or rubber boots. - Switch off the tools before connecting them to a power supply. - If a power cord feels more than comfortably warm or if a tool is sparking, have it checked by an electrician or other qualified person. - Disconnect the power supply before making adjustments or changing accessories. - Remove any wrenches and adjusting tools before turning on a tool. - Inspect the cord for fraying or damage before each use. Tag defective tools clearly with an "Out of service" tag and replace immediately with a tool in good running order. During use, keep power cords clear of tools and the path that the tool will take. - Use clamps, a vice, or other devices to hold and support the piece being worked on, when practical. This will allow you to use both hands for better control of the tool and will help prevent injuries if a tool jams or binds in a workpiece. - Use only approved extension cords with the proper wire size (gauge) for the length of cord and power requirements of the electric tool that you …

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CPWR TOOLBOX Power Saw Safety RESEARCH AND TRAINING THE CENTER FOR CONSTRUCTION TALK Each year, power saws cause serious injuries, such as electrical shock, cuts, and lacerations, to thousands of workers. These tools can do more than just injure a worker-they can kill. ## Quentin's Story Quentin, a carpenter, was remodeling a home. He had finished the wood frame for an outside wall and began to trim the drywall with a power saw. Quentin set the depth of the saw blade to 1 inch past the thickness of the drywall. The blade came in contact with the sawhorse and kicked back, cutting his arm and torso. Quentin's injuries included cut ligaments and tendons in his arm. - How could this injury have been prevented? - Have you or someone you know ever been injured by a power saw? If so, what happened? ## Remember This Read the owner's manual before you first use a saw. Make sure that moveable guards are working properly. Keep blades sharp, clean, and - oiled. Inspect blades for cracks. ➤ Wear goggles or safety glasses with side shields, even if you wear a face shield. Also wear proper shoes. ➤ Take these steps to prevent entanglement: ○ Do not wear jewelry, such as chains. ○ Do not wear loose clothes. ○ Put up your hair if it is long, and tie it inside your hard hat. - Cut only if you have a clear work area and solid footing. Make sure the cutting path is clear of any foreign objects or nails. - Make sure your electric saw is double-insulated, with a 3-prong plug in a grounded outlet. ➤ Use a cord with built-in GFCI (Ground Fault Circuit Interrupter) when working in dampness. ➤ Consider using a simple, nonbreakable night- light in the cord for a power-on indicator. - Let the blade spin down, and do not stop it with your hand. Unplug the saw before you change a blade. Make sure you can see and control the plug so no one else plugs it in, or put the plug in a locked plastic box. How can we stay safe today? What will we do at the worksite to prevent inj…

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# Struck-by injuries-Electric saws ## Explain dangers Electric saws such as table saws, chainsaws, and circular saws are some of the most widely used power tools on construction sites. They're also among the most dangerous. Hundreds of Ontario workers are hospitalized each year after being struck by a power saw or the material they were cutting with it. Common struck-by injuries from electric saws include • Cuts and lacerations • Amputations • Fractures • Eye injuries from flying debris. ## Identify controls • Read all the safety materials and follow the manufacturer's instructions when using electric saws. • Wear all required personal protective equipment when operating electric saws. That includes safety glasses, hearing protection, a dust mask, and appropriate footwear. • Turn the power off or disconnect electric saws from the power source before making adjustments or replacing blades. • The blade of the saw should extend only 1/8 in (3 mm) below the piece of material that you are cutting. The risk of a struck-by injury from kickback increases as more of the blade is exposed below the material. • Never use your knees or foot to support the material you're cutting. - Never pull the saw backward when you're cutting. • Keep your hand away from the front of the saw. • Never reach under, around, or behind the material you're cutting while the saw blade is moving. • Never carry a saw with your finger on the trigger. • Ensure blades and tools are inspected prior to use. . Ensure all guards are in place and that they have not been tampered with. - Never put the saw down until the blade/chain and motor has stopped. • Position yourself so that you are in control of the saw. - Never wedge, wire, or jam the guard to prevent it from working. • Only competent workers should use an electric saw. - Never wear loose clothing, neck chains, scarves, or anything else that can get caught in the saw. ## Demonstrate Demonstrate how to use an electri…

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# A. Introduction (cont.) ## Hierarchy of Controls (cont.) requirements under WAC [redacted identifier] Personal Protective Equipment (PPE). The next section tells you what you must do if your employees need PPE. Examples of some PPE: <table><tr><th>Body part</th><th>Example of PPE</th><th>Example of hazard/ hazardous condition</th></tr><tr><td>Head</td><td>hard hat</td><td>contact from falling object</td></tr><tr><td>Face</td><td>face shield</td><td>impact from flying wood chips</td></tr><tr><td>Eyes</td><td>safety glasses</td><td>liquid chemical splash</td></tr><tr><td>Body (torso)</td><td>leather apron</td><td>burn from molten metal work</td></tr><tr><td>Arms, hands</td><td>puncture-resistant metal- mesh gloves</td><td>cut from shellfish processing</td></tr><tr><td>Legs, feet</td><td>knee guards</td><td>awkward posture, pressure from carpet laying</td></tr><tr><td rowspan="2">Potentially life-threatening</td><td>life jacket (personal flotation device)</td><td>drowning from falling into water</td></tr><tr><td>*body harness/personal fall protection system</td><td>*fall from roof</td></tr><tr><td>Ears</td><td>*ear plugs</td><td>*loud noise from machinery</td></tr><tr><td>Lungs</td><td>*face mask with cartridge</td><td>*vapors from cleaning with solvent</td></tr></table> * PPE for these and other hazards are not included in this volume of the PPE Guide but will be covered in future volumes (see WAC 296-62 for respiratory and hearing protection and WAC 296-155 for fall protection for further assessment). 7