CalculatingtheTorqueValuesWhenUsingaDrive-AdapterWrench
g205924
Figure5
TorqueConversionFactor=A/B
1.Torquewrench
3.A(effectivelengthoftorquewrench)
2.Drive-adapterwrench(crowsfoot)4.B(effectivelengthoftorquewrenchand
drive-adapterwrench)
Usingadrive-adapterwrench(e.g.,crowfootwrench)inanypositionotherthan
90°and270°totheframeofthetorquewrenchwillaffectthetorquevalue
measuredbythetorquewrenchbecauseoftheeffectivelength(lever)ofthe
torquewrenchchanges.Whenusingatorquewrenchwithadrive-adapter
wrench,multiplythelistedtorquerecommendationbythecalculatedtorque
conversionfactor()todeterminepropertighteningtorque.Whenusingatorque
wrenchwithadrive-adapterwrench,thecalculatedtorquewillbelowerthanthe
listedtorquerecommendation.
Example:Themeasuredeffectivelengthofthetorquewrench(distancefromthe
centerofthehandletothecenterofthesquaredrive)is457mm(18inches).
Themeasuredeffectivelengthofthetorquewrenchwiththedrive-adapter
wrenchinstalled(distancefromthecenterofthehandletothecenterofthe
drive-adapterwrench)is483mm(19inches).
Thecalculatedtorqueconversionfactorforthistorquewrenchwiththis
drive-adapterwrenchwouldbe18/19=0.947.
Ifthelistedtorquerecommendationforafasteneris103to127N∙m(76to94
ft-lb),thepropertorquewhenusingthistorquewrenchwithadrive-adapter
wrenchwouldbe98to121N∙m(72to89ft-lb).
SpecicationsandMaintenance:TorqueSpecications
Page2–8
Groundsmaster
®
5900&5910
16227SLRevB
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