Working load limit wll of a chain is another designated safety measure.
Chain working load limit.
Wll mbl sf.
An example of this would be a chain that has a mbl of 2000 lbf 8 89 kn would have a swl or wll of 400 lbf 1 78 kn if a safety factor of 5 5 1 5 to 1 or 1 5 is used.
A chain s wll is the maximum tension that can be placed on an undamaged or brand new chain.
Do not expose assembly to impact rapid lifts or sudden stops.
Working load limit or wll refers to the maximum allowed weight.
It is a rated capacity and often referred to in pounds.
Distribute the load evenly.
The term working load limit wll refers to the maximum amount of tension that can be applied to a new and undamaged chain.
Do not load an assembly in excess of working load limits shown.
It is always essential to know the working load limit of the chain you are using.
Chain grades advertised by manufacturers are one tenth of the actual mathematical grades.
The working load limit of the chain must be sufficiently strong to support the load s weight as well as any added forces from the hitch types and angles used.
Determining chain working load limits.
Do not use a chain that appears to be defective worn or damaged.
The proof test load usually twice the working load limit is the load which the product withstood without deformation when new and under laboratory test conditions.
A constantly increasing force is applied in direct line to the product at a uniform rate of speed on a standard pull testing machine.
Do not tie knots or allow chains to become twisted.
Do not put an unequal load on one leg of a sling.
Working load limit is always 1 3 of the breaking strength.
Therefore a strap with a breaking strength of 15 000 pounds will have a working load limit of 5 000 pounds.
Chains have a working load limit or wll of approximately one third of their break strengths the amount of force the chains can withstand before they break.
Working load limits of chain whether you transport machinery use tow chains or are in the logging industry it s important to know the working load limits of chain you are using.
The roller chain size charts below will help ensure you purchase the chain that suits your machinery best and provides the strength or load carrying capacity required by your specific manufacturing process.
Working load limit wll is the maximum working load designed by the manufacturer.
Usa roller chain and sprockets is one of the nation s largest suppliers of roller chain and industrial pt components.
