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