Excessive internal friction caused by temporary extreme loading and made worse by inadequate lubrication results in turned pins. It is important to note that extreme loads on a brand new leaf chain results in turned pins even on its very first movement. The likelihood of turned pins occurring increases when internal leaf chain bearing pressure exceeds 0.18 kN/mm²; this would be 14% to 15% of a leaf chain tensile strength (UTS). Some machinery stands allow operating loads of up to 20% UTS, which increases the risk of turned pins even without working in demanding environments.
Xtreme pressure leaf chains are dimensionally similar to the leaf chain in the international standard. However, the pin length is longer than the ISO standard equivalent, and the running width and distance between flanges may require checking and adjustment. If the leaf chain anchors have been made to international standards, the leaf chain terminations should require no alteration.
These leaf chains have a tensile strength in excess of the international standard as they are made up of slip fit links, and there is a reduction fatigue load when compared to standard construction leaf chain.
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|Inter-changeable||Pitch P MM||Pin Diameter A MM||Plate Thickness B MM||Plate Depth C MM||Pin Length D MM||Washer Thickness||Weight KG/Metre||Breaking Strength kN|