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Various Hoist Classifications as Determined by ISO/JIS
- Nov 09, 2018 -
Various Hoist Classifications as Determined by ISO/JIS
State of Loading  Total Duration of using (hour)
20040080016003200630012500
LightMechanisms subjected very rarely to the maximum load and, normally, to light loads----M1M2M3M4M5
ModerateMechanisms subjected fairly frequently to the maximum load but, normally, to rather, moderate loads--M1M2M3M4M5M6
Heavymechanisms subjected frequenctly to the maximum load and, normally, to loads of heavy magnitudeM1M2M3M4M5M6--
Very heavyMechanisms subjected regularly to the maximum loadM2M3M4M5M6----

State of Loading and total duration of useing are the factors used to determine the hoist classification that should be used: M1, M2, M3, M4, M5, or M6. Cross referecing the two factors with one another will lead to a classification choice in the Chart

Examples:

1. A hoist that would be subjected frequently to the maximum load and, normally, to loads of heavy magnitude (a “heavy” state of loading), that requirement a lift span of 1600 hours should be in classification group M5.

2. A hoist that would be subjected very rarely to the maximum load and, normally, to light loads (a “light” state of loading), that requires a life span of 6300 hours should be in classification group M4.

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