Thread Rolling Screws: Helping Bolts Impress into the Raw Stock
The self-tapping or thread-rolling screws are those types of fasteners, which feature threads, specially designed to tap in their own holes. Such types of rivets are ideal for fastening objects in softer materials such as plastic and wood, but do not suit at all for harder materials such as metal.
Thread rolling is a type of fastening procedure, which involves penetrating bolts threads into the raw stock instead of cutting them. This procedure requires a sturdy steel tool to be formed in the shape of the necessary thread. The raw and uneven stock is spun at a definite rate; simultaneously the tool bit is pressed against it with high pressure. Thus, the shape of the screw thread is efficiently placed upon the stock base.
The tool bit is constantly put under pressure and is moved towards the stock, till the full-depth threads are created. The thread forming process is bit cheaper as compared to the thread cutting, thereby yielding durable and safer end results. Fasteners, such as screws, nuts and bolts are the most commonly used rivets in the world, with ample quantities produced across the world every year. These rivets are generally yielded from raw metal stock, which is created prior to the introduction of threads. Basically, there are two steps involved in forming the threads; thread rolling and thread cutting.
The thread cutting procedure involves a cutting die, which is moved up the length of the rotating stock, thereby cutting away the metal surface to create the threads. Although this process is effective, it is always time-consuming.
The thread rolling screws on the other hand is a better application in various aspects. In this method, a sturdy tool bit is used to insert the threads into the stock surface. The tool bit is formed in the shape of the threads and with great pressure; it is then forced against the stock.
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