What is the machine screw?
The machine screw, also called the machine screw, is a cylindrical fastening element used to grip two pieces of metal together. The screw consists of a threaded shaft with a square -shaped head or hexagon -shaped head at one end. To tighten or release the fastener, a hand or socket is used to tighten or release the fastening meat. The shaft of the screw is inserted through the holes drilled into both pieces of metal and the nut is stretched on the protruding threads of the screw. The correct clamping pressure is applied by tightening the nut to the specified torque. In some applications, the matrix is not used because the screw fibers connect the underprocess hole in the second piece of metal.
Most machine screws are made of low or medium carbon steel, although there are also bolts made of stainless steel and silicon bronze. Stainless steel and silicon bronze screws resist corrosion much better than those carbon steels and are usually used in applications where elements will be exposed. Aluminum and brass screwsI are available for special applications in the aerospace and maritime industry. Machine head screws are available in standard and metric sizes and in the left and right fibers. There are also varieties of gross and fine governments.
The cold formation process is the most commonly used method of production machine screws. The cold machine usually has a number of three or four dies, which gradually shape the metal blank for the desired final shape and dimensions. When the cold formation is complete, the voting machine cuts the machine to the machine -finished screw shaft. The machine screws are usually treated thermal to obtain the desired hardness and tensile strength. Finally, the completed screws can undergo the final zinc process or immerse hot immersion as a corrosion inhibitor.
can be categorized by a screw of the storage of one of several stages based on strength and composition of the tensile material. ThreeThe most commonly used stamps in the US are two, five and eight signs. Higher bolts have higher minimum tensile strength and hardness and are generally used where stronger fasteners are required. Metric classes 8.8 and 10.9 Machine screws are roughly equivalent to five and eight degrees. The stainless steel screw is classified according to the type of steel used.
In order to get the maximum pressure on the clamping and ensure a good joint, the machine screw should always be tightened for the correct torque by the key torque. The rotating graphs are widely available online or from the screw manufacturer for a number of screw diameters and thread spacing. When tightening, it can potentially lead to the free functioning of the screw, causing joint failure. Despite tightening, it can stretch the machine screw, potentially lead to fatigue or breaking over time.