hand & pwoer tools

8/11/2019 Hand & Pwoer Tools

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ToolsHand and Power


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Hazards

Workers using hand andpower tools may beexposed to these hazards:

objects that fall, fly, are

abrasive, or splashharmful dusts, fumes, mists,vapors, and gases

frayed or damaged electrical

cords, hazardous connectionsand improper grounding


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Basic Tool Safety Rules

Maintain regularly

Use right tool for the job

Inspect before use

Operate according tomanufacturers instructions

Use the right personal

protective equipment (PPE)Use guards


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Hand Tool Hazards

Hazards are usually caused by

misuse and improper maintenance

Do not use:wrenches when jaws as sprung

impact tools (chisels andwedges) when heads havemushroomed

tools with loose, cracked orsplintered handles

a screwdriver as a chisel

tools with taped handlesthey

may be hiding cracks

Crack


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Hand Tools - Protection

Use PPE, such as safetygoggles and gloves

Keep floor surfacewhere working free fromdebris and tripping orslipping hazards

Keep cutting tools sharp


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Power Tools

Must be fitted with guards

and safety switches

Extremely hazardous whenused improperly

Different types, determinedby their power source:ElectricPneumatic

Liquid fuelHydraulicPowder-actuated


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Switches

Hand-held power tools must beequipped with one of thefollowing:

Constant pressure switch

shuts off power upon releaseExamples:circular saw, chainsaw, grinder, hand-held powerdrill

On-Off SwitchExamples:routers, planers,

laminate trimmers, shears, jigsaws scroll saws


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Power Tools - Precautions Disconnect tools when not in use, before

servicing and cleaning, and when changingaccessories

Keep people not involved with the work awayfrom the work

Secure work with clamps or a vise, freeing bothhands to operate the tool

Dont hold the switch button while carrying aplugged-in tool

Keep tools sharp and clean

Consider what you wearloose clothing andjewelry can get caught in moving parts

Remove damaged electric tools & tag them: DoNot Use


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Power ToolsPrecautionsElectric Cords

Dont carry portabletools by the cord

Dont use electric

cords to hoist or lowertools

Dont yank cord orhose to disconnect it

Keep cords and hosesaway from heat, oil,and sharp edges


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To protect a worker from shock, these tools must:

have a 3-wire cord plugged into a grounded receptacle be double insulated, or be powered by a low-voltage isolation transformer

Electric Power Tools

Doubleinsulated

markings Plug with agroundingpin


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Electric ToolsGood Practices

Operate within design limitsUse gloves and safety shoes

Store in a dry place

Dont use in wet locationsunless approved for that

Keep work areas well lit

Ensure cords dont present atripping hazard


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Abrasive Wheels and Tools

May throw off flying fragments

Equip with guards that:Cover the spindle end, nut,

& flange projectionsMaintain proper alignmentwith the wheelDont exceed the strength ofthe fastenings

Guard so that a minimalamount of the wheel isexposed


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Inspecting Abrasive Wheels

Before mounting:inspect closely for damageperform sound- or ring-testto ensure free from cracks /

defects

To test:tap wheel gently with a light,non-metallic instrumentif wheel sounds cracked ordead, do not use it because itcould fly apart


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Abrasive Wheel Use

To prevent cracking:fit the wheel on the spindlefreelytighten the spindle nut enoughto hold the wheel in place

without distorting the flange

Let the tool come up to speedprior to grinding or cutting

Dont stand in front of the wheelas it comes up to full speed

Use eye and/or face protection

Ensure the spindlespeed doesnt exceedthe maximum speedmarked on the wheel


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Abrasive Wheel Work Rests

Keep work rests notmore than 1/8th inchfrom wheel surface

This prevents jammingthe work between thewheel and the rest, whichmay cause the wheel tobreak

Dont adjust wheel whileits rotating


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Compressed Air Cleaning

Dont use compressed

air for cleaning

Exception - wherereduced to less than

30 p.s.i. with effective

chip guarding and PPE


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Liquid Fuel Tools

Usually gas powered

Main hazardfuel vapors

Use only approvedflammable liquid containers

Before refilling a fuel-powered tool tank, shutdown the engine and allow itto cool


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Summary

Hazards are usually the result of improper tooluse or not following one or more of theseprotection techniques:

Inspecting the tool before useUsing PPE (Personal Protective Equipment)

Using guards

Properly storing the tool

Using safe handling techniques

hand & pwoer tools

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