EL stands for European Light (or Leaf Light) and is a type of leaf chain constructed from European Standard roller chain components. Manufactured to ISO4347, DIN8152 and NFE26107, it is a lightweight chain used for light load lifting applications and machine tools.
The elastic limit of a chain is the maximum load it can support without experiencing permanent change in length. The elastic limit is usually around 70% of the breaking load.
Embrittlement occurs when the ductility of a material has been reduced and can lead to premature failure. It is often due to incorrect material selection or heat treatments. Hydrogen embrittlement is caused by the presence of hydrogen sulphide, hydrochloric acid or sulphuric acid which are sometimes present in batteries or cleaning fluids. Electroplating, welding and pickling are common causes of hydrogen embrittlement.
Fatigue occurs when a chain is repeatedly loaded. If the chain is subject to a high level of stress, it will fail after only a few circles. If the stress is reduced, the number of cycles before failure increases until the point at which failure will never occur. The chain is now operating below the 'endurance limit'. If stress is controlled, failure will most likely be due to wear rather than fatigue.
En-masse conveying involves inducing material to behave almost as a liquid by exerting a motive force along the entire conveying length.
An extended bearing pin attachment is a type of conveyor chain attachment that consists of a chain pin that extends beyond the length of the riveted pins to carry end used fittings.