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How do Pallet Makers Choose Pallet Nails-2
There are usually two kinds of failure: nail head in the panel pull loose; The nail bar deviates from a wooden beam or pier.
The pull off of the nail head is mainly caused by the bending of the nail, which leads to the damage of the panel. Of all the properties that affect the quality of screw nails, the two most significant are the difference between wire diameter and thread diameter and the bending stiffness of nails, which are the most influential factors on the drawing force. A general rule to keep in mind is that the greater the difference between the diameter of the screw wire and the outer diameter of the thread, the better the quality of the screw and the greater its pull resistance.
In fact, the thread depth is one of the most important characteristics affecting the pulling force. If the difference between thread and thread diameter is greater than 0.020 inch (0.5mm), the nail quality is good, and when the difference drops to 0.016 inch (0.4mm) to 0.020 inch, the relative nail quality is very good. A difference of 0.012 (0.3mm) to 0.015 inch is marginal, and less than 0.010 inch (0.2mm) is considered very poor.
For screw screw, thread Angle is also the key characteristic affecting pulling resistance. Thread angles of 67 to 68 degrees are common. A thread Angle of 77 degrees or more is called "lazy" and results in poor performance on the drawing force test.
Keep these principles in mind when selecting pallet nails, better nails will result in better pallet.
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