Harrington Hoists EAC900 Saw User Manual


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Harrington complete cranes
Crane Service Classifications:
Crane Service Class:
• TheCraneManufacturersAssociationofAmerica(CMAA)hasestablishedsixserviceclasses
forcranes.TheseclassesareClassAthroughClassF,andarebasedonloadcyclesand
loadmagnitude.ClassAcranesaresuitedfortheleastsevereservice,andClassFcranesare
suitedforthemostsevereservice.
Class C Service Class:
TheloadcycleandmagnitudecombinationsthatdefinetheClassCServiceClassare:
• Loadisusuallybetween1/3and2/3ofratedcapacityandisfrequentlyequaltorated
capacity,anddesignservicelifeis20,000to100,000cycles.
• Loadisusually1/3ofratedcapacityandisrarelyequaltoratedcapacity,anddesignservice
lifeis100,000to500,000cycles.
• Loadisusuallyverylightandrarelyisequaltoratedcapacity,anddesignservicelifeis
500,000to2,000,000cycles.
Class B Service Class:
TheloadcycleandmagnitudecombinationsthatdefinetheClassBServiceClassare:
• Loadisusually1/3ofratedcapacityandisrarelyequaltoratedcapacity,anddesignservice
lifeis20,000to100,000cycles.
• Loadisusuallyverylightandrarelyisequaltoratedcapacity,anddesignservicelifeis
200,000to500,000cycles.
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