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1. Electrical shocks which can lead to injuries such as heart failure and burns are among the major hazards associated with electric powered tools Under certain conditions even a small amount of electric EHS G C18 Page 3 Issued 04 22 08 Destroy Previous Revisions Approved BH current can result in fibrillation of the heart and death An electric shock also can cause the user to fall off a ladder or other elevated work surface and be injured due to the fall To protect the user from shock and burns electric tools must have a three wire cord with a ground and be plugged into a grounded receptacle be double insulated or be powered by a low voltage isolation transformer Three wire cords contain two current carrying conductors and a grounding conductor Any time an adapter is used to accommodate a two hole receptacle the adapter wire must be attached to a known ground The third prong must never be removed from the plug Double insulated tools are available that provide protection against electrical shock without third wire grounding On double insulated tools an internal layer of protective insulation completely isolates the external housing of the tool The following general practices should be followed when using electric tools e Operate electric tools within their design limitations e Use gloves and appropriate safety footwear when using electric tools e Store electric tools in a dry place when not in use e Do not use electri
2. loaded gun and must be treated with extreme caution In fact they are so dangerous that they must be operated only by specially trained employees When using powder actuated tools an employee must wear suitable ear eye and face protection The user must select a powder level high or low velocity that is appropriate for the powder actuated tool and necessary to do the work without excessive force The muzzle end of the tool must have a protective shield or guard centered perpendicular to and concentric with the barrel to confine any fragments or particles that are projected when the tool is fired A tool containing a high velocity load must be designed not to fire unless it has this kind of safety device EHS G C18 Page 6 Issued 04 22 08 Destroy Previous Revisions Approved BH To prevent the tool from firing accidentally two separate motions are required for firing The first motion is to bring the tool into the firing position and the second motion is to pull the trigger The tool must not be able to operate until it is pressed against the work surface with a force of at least 5 pounds 2 2 kg greater than the total weight of the tool If a powder actuated tool misfires the user must hold the tool in the operating position for at least 30 seconds before trying to fire it again If it still will not fire the user must hold the tool in the operating position for another 30 seconds and then carefully remove the load in accordanc
3. Section C 18 University of South Carolina Safety Program Guide HAND TOOLS Introduction This guide is intended to provide a generic non exhaustive overview of some of the standards related topics to hand tools Employees who use hand and power tools and are exposed to the hazards of falling flying abrasive and splashing objects or to harmful dusts fumes mists vapors or gases must be provided with the proper training and appropriate personal protective equipment All electrical connections for these tools must be suitable for the type of tool and the working conditions wet dusty flammable vapors When a temporary power source is used for construction in wet locations or outside a ground fault circuit interrupter GFCI should be used If a hazardous situation is encountered it must be brought immediately to the attention of the proper individual for hazard abatement Scope and Application Five basic safety rules can help prevent hazards associated with the use of hand and power tools 1 Keep all tools in good condition with regular maintenance 2 Use the right tool for the job 3 Examine each tool for damage before use and do not use damaged tools 4 Operate tools according to the manufacturers instructions 5 Provide and use properly the right personal protective equipment Program Description 1 Hand tools Hand tools include anything from axes to wrenches The greatest hazards posed by hand tools result from misuse an
4. c tools in damp or wet locations unless they are approved for that purpose e Keep work areas well lighted when operating electric tools e Ensure that cords from electric tools do not present a tripping hazard e In the construction industry in wet locations or outside employees who use electric tools must be protected by ground fault circuit interrupters or an assured equipment grounding conductor program 6 Portable Abrasive Wheel Tools Portable abrasive grinding cutting polishing and wire buffing wheels create special safety problems because they may throw off flying fragments Abrasive wheel tools must be equipped with guards that 1 cover the spindle end nut and flange projections 2 maintain proper alignment with the wheel and 3 do not exceed the strength of the fastenings Before an abrasive wheel is mounted it must be inspected closely for damage and should be sound or ring tested to ensure that it is free from cracks or defects To test wheels should be tapped gently with a light non metallic instrument If the wheels sound cracked or dead they must not be used because they could fly apart in operation A stable and undamaged wheel when tapped will give a clear metallic tone or ring To prevent an abrasive wheel from cracking it must fit freely on the spindle The spindle nut must be tightened enough to hold the wheel in place without distorting the flange Always follow the manufacturer s recommendations Tak
5. d improper maintenance Some examples include the following e Ifachisel is used as a screwdriver the tip of the chisel may break and fly off hitting the user or other employees e Ifa wooden handle on a tool such as a hammer or an axe is loose splintered or cracked the head of the tool may fly off and strike the user or other employees e Ifthe jaws of a wrench are sprung loose the wrench might slip e Ifimpact tools such as chisels wedges or drift pins have mushroomed heads the heads might shatter on impact sending sharp fragments flying toward the user or other employees e Employees when using saw blades knives or other tools should direct the tools away from aisle areas and away from other employees working in close EHS G C18 Page Issued 04 22 08 Destroy Previous Revisions Approved BH proximity Knives and scissors must be sharp dull tools can cause more hazards than sharp ones Cracked saw blades must be removed from service Wrenches must not be used when jaws are sprung loose to the point that slippage occurs Impact tools such as drift pins wedges and chisels must be kept free of mushroomed heads The wooden handles of tools must not be splintered Iron or steel hand tools may produce sparks that can be an ignition source around flammable substances Where this hazard exists spark resistant tools made of non ferrous materials should be used where flammable gases highly volatile liquids and other explo
6. d never dead end them against themselves or anyone else A chip guard must be used when compressed air is used for cleaning Use of heavy jackhammers can cause fatigue and strains Heavy rubber grips reduce these effects by providing a secure handhold Workers operating a jackhammer must wear safety glasses and safety shoes that protect them against injury if the jackhammer slips or falls A face shield also should be used Noise is another hazard associated with pneumatic tools Working with noisy tools such as jackhammers requires proper effective use of appropriate hearing protection Liquid Fuel Tools Fuel powered tools are usually operated with gasoline The most serious hazard associated with the use of fuel powered tools comes from fuel vapors that can burn or explode and also give off dangerous exhaust fumes The worker must be careful to handle transport and store gas or fuel only in approved flammable liquid containers according to proper procedures for flammable liquids Before refilling a fuel powered tool tank the user must shut down the engine and allow it to cool to prevent accidental ignition of hazardous vapors When a fuel powered tool is used inside a closed area effective ventilation and or proper respirators such as atmosphere supplying respirators must be utilized to avoid breathing carbon monoxide Fire extinguishers must also be available in the area Powder Actuated Tools Powder actuated tools operate like a
7. e care to ensure that the spindle speed of the machine will not exceed the maximum operating speed EHS G C18 Page 4 Issued 04 22 08 Destroy Previous Revisions Approved BH marked on the wheel An abrasive wheel may disintegrate or explode during start up Allow the tool to come up to operating speed prior to grinding or cutting The employee should never stand in the plane of rotation of the wheel as it accelerates to full operating speed Portable grinding tools need to be equipped with safety guards to protect workers not only from the moving wheel surface but also from flying fragments in case of wheel breakage When using a powered grinder e Always use eye or face protection e Turn off the power when not in use e Never clamp a hand held grinder in a vise Pneumatic Tools Pneumatic tools are powered by compressed air and include chippers drills hammers and sanders There are several dangers associated with the use of pneumatic tools First and foremost is the danger of getting hit by one of the tool s attachments or by some kind of fastener the worker is using with the tool Pneumatic tools must be checked to see that the tools are fastened securely to the air hose to prevent them from becoming disconnected A short wire or positive locking device attaching the air hose to the tool must also be used and will serve as an added safeguard If an air hose is more than 2 inch 12 7 millimeters in diameter a safety excess fl
8. e training appropriate to their assigned tasks on the safe use and operation of tool which are required to before any and all job task The supervisor is responsible for the safe condition of tools and equipment used by employees Employers shall not issue or permit the use of unsafe hand tools Ensure workers are provided with and use protective equipment and materials Provide general training Provide assistance with evaluation and selection of tools Provide a periodic audit of this program Attend training Use only appropriate tools required to perform job task Inspect all tools before use Do Not Use any tool that is damaged or unsafe For More Information EHS G C18 Contact the USC Employee Safety Manager Buddy Harley at 777 5269 Online at http osha gov CFR 1910 Subpart P and CFR 1926 Subpart I Page 9 Issued 04 22 08 Destroy Previous Revisions Approved BH
9. e with the manufacturer s instructions This procedure will make the faulty cartridge less likely to explode The bad cartridge should then be put in water immediately after removal If the tool develops a defect during use it must be tagged and taken out of service immediately until it is properly repaired Safety precautions that must be followed when using powder actuated tools include the following e Do not use a tool in an explosive or flammable atmosphere e Inspect the tool before using it to determine that it is clean that all moving parts operate freely and that the barrel is free from obstructions and has the proper shield guard and attachments recommended by the manufacturer e Do not load the tool unless it is to be used immediately e Do not leave a loaded tool unattended especially where it would be available to unauthorized persons e Keep hands clear of the barrel end e Never point the tool at anyone e When using powder actuated tools to apply fasteners several additional procedures must be followed e Do not fire fasteners into material that would allow the fasteners to pass through to the other side e Do not drive fasteners into very hard or brittle material that might chip or splatter or make the fasteners ricochet e Always use an alignment guide when shooting fasteners into existing holes e When using a high velocity tool do not drive fasteners more than 3 inches 7 62 cms from an unsupported edge or corn
10. er of material such as brick or concrete e When using a high velocity tool do not place fasteners in steel any closer than 2 inch 1 27 cms from an unsupported corner edge unless a special guard fixture or jig is used 10 Hydraulic Power Tools The fluid used in hydraulic power tools must be an approved fire resistant fluid and must retain its operating characteristics at the most extreme temperatures to which it will be exposed The exception to fire resistant fluid involves all hydraulic fluids used EHS G C18 Page 7 Issued 04 22 08 Destroy Previous Revisions Approved BH for the insulated sections of derrick trucks aerial lifts and hydraulic tools that are used on or around energized lines This hydraulic fluid shall be of the insulating type The manufacturer s recommended safe operating pressure for hoses valves pipes filters and other fittings must not be exceeded All jacks including lever and ratchet jacks screw jacks and hydraulic jacks must have a stop indicator and the stop limit must not be exceeded Also the manufacturer s load limit must be permanently marked in a prominent place on the jack and the load limit must not be exceeded A jack should never be used to support a lifted load Once the load has been lifted it must immediately be blocked up Put a block under the base of the jack when the foundation is not firm and place a block between the jack cap and load if the cap might slip To set u
11. good footing and maintain good balance when operating power tools Wear proper apparel for the task Loose clothing ties or jewelry can become caught in moving parts Remove all damaged portable electric tools from use and tag them Do Not Use 3 Guards The exposed moving parts of power tools need to be safeguarded Belts gears shafts EHS G C18 Page 2 Issued 04 22 08 Destroy Previous Revisions Approved BH 4 pulleys sprockets spindles drums flywheels chains or other reciprocating rotating or moving parts of equipment must be guarded Machine guards as appropriate must be provided to protect the operator and others from the following e Point of operation In running nip points Rotating parts Flying chips and sparks Safety guards must never be removed when a tool is being used Portable circular saws having a blade greater than 2 inches 5 08 centimeters in diameter must be equipped at all times with guards An upper guard must cover the entire blade of the saw A retractable lower guard must cover the teeth of the saw except where it makes contact with the work material The lower guard must automatically return to the covering position when the tool is withdrawn from the work material Operating Controls and Switches The following hand held power tools must be equipped with a constant pressure switch or control that shuts off the power when pressure is released drills tappers fastener drivers hori
12. ow valve must be installed at the source of the air supply to reduce pressure in case of hose failure In general the same precautions should be taken with an air hose that are recommended for electric cords because the hose is subject to the same kind of damage or accidental striking and because it also presents tripping hazards When using pneumatic tools a safety clip or retainer must be installed to prevent attachments such as chisels on a chipping hammer from being ejected during tool operation Pneumatic tools that shoot nails rivets staples or similar fasteners and operate at pressures more than 100 pounds per square inch 6 890 kPa must be equipped with a special device to keep fasteners from being ejected unless the muzzle is pressed against the work surface Airless spray guns that atomize paints and fluids at pressures of 1 000 pounds or more per square inch 6 890 kPa must be equipped with automatic or visible manual safety devices that will prevent pulling the trigger until the safety device is manually released EHS G C18 Page 5 Issued 04 22 08 Destroy Previous Revisions Approved BH Eye protection is required and head and face protection is recommended for employees working with pneumatic tools Screens must also be set up to protect nearby workers from being struck by flying fragments around chippers riveting guns staplers or air drills Compressed air guns should never be pointed toward anyone Workers shoul
13. p a jack make certain of the following e The base of the jack rests on a firm level surface The jack is correctly centered The jack head bears against a level surface and The lift force is applied evenly Proper maintenance of jacks is essential for safety All jacks must be lubricated regularly In addition each jack must be inspected according to the following schedule 1 for jacks used continuously or intermittently at one site inspected at least once every 6 months 2 for jacks sent out of the shop for special work inspected when sent out and inspected when returned and 3 for jacks subjected to abnormal loads or shock inspected before use and immediately thereafter Training All employees shall be trained prior to use on safe use and operation of all tools Retraining maybe required annual and or more frequently based on observed noncompliance of this guide Employees should be trained in the proper use of all tools Workers should be able to recognize the hazards associated with the different types of tools and the safety precautions necessary Roles and Responsibilities Department EHS G C18 Page 8 Issued 04 22 08 Destroy Previous Revisions Approved BH Supervisors EHS Individual Provide specific training for employees on the safe operation and use of all tools required to safely perform all job task Provide and maintain necessary protective equipment and materials Ensure employees receiv
14. sive substances are stored or used 2 What Are the Dangers of Power Tools Appropriate personal protective equipment such as safety goggles and gloves must be worn to protect against hazards that may be encountered while using any tools Workplace floors shall be kept as clean and dry as possible to prevent accidental slips with or around dangerous hand tools Power tools must be fitted with guards and safety switches they are extremely hazardous when used improperly The types of power tools are determined by their power source electric pneumatic liquid fuel hydraulic and powder actuated To prevent hazards associated with the use of power tools workers should observe the following general precautions Never carry a tool by the cord or hose Never yank the cord or the hose to disconnect it from the receptacle Keep cords and hoses away from heat oil and sharp edges Disconnect tools when not using them before servicing and cleaning them and when changing accessories such as blades bits and cutters Keep all people not involved with the work at a safe distance from the work area Secure work with clamps or a vise freeing both hands to operate the tool Avoid accidental starting Do not hold fingers on the switch button while carrying a plugged in tool Maintain tools with care keep them sharp and clean for best performance Follow instructions in the user s manual for lubricating and changing accessories Be sure to keep
15. zontal vertical and angle grinders with wheels more than 2 inches 5 08 centimeters in diameter disc sanders with discs greater than 2 inches 5 08 centimeters belt sanders reciprocating saws saber saws scroll saws and jigsaws with blade shanks greater than 4 inch 0 63 centimeters wide and other similar tools These tools also may be equipped with a lock on control if it allows the worker to also shut off the control in a single motion using the same finger or fingers The following hand held power tools must be equipped with either a positive on off control switch a constant pressure switch or a lock on control disc sanders with discs 2 inches 5 08 centimeters or less in diameter grinders with wheels 2 inches 5 08 centimeters or less in diameter platen sanders routers planers laminate trimmers nibblers shears and scroll saws and jigsaws saber and scroll saws with blade shanks a nominal 4 inch 6 35 millimeters or less in diameter It is recommended that the constant pressure control switch be regarded as the preferred device Other hand held power tools such as circular saws having a blade diameter greater than 2 inches 5 08 centimeters chain saws and percussion tools with no means of holding accessories securely must be equipped with a constant pressure switch Electric Tools Employees using electric tools must be aware of several dangers Among the most serious hazards are electrical burns and shocks
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