The average person is quite difficult to understand the large number of files of various shapes with different sizes of notches and their scope. That is why the article will consider the classification of the main types of this tool, which will be further supplemented by new types of files, as the new models are very different from the old ones.
Although the first file appeared a long time ago, it is almost impossible to find a replacement even in the age of advanced technologies, after all, most work on wood and metal is performed using this tool. The device provides the selected material the desired shape and size by layer-by-layer grinding of its surface.
The classic modern file resembles a bar in its appearance, made of special grade steel, with a surface cut according to a certain pattern. Most of these cutting tools are triangular, rectangular or round cross section of the bar, however, there are other types of sections.
The most commonly used material for the manufacture of the device are various types of high-quality tool steel, example, chromium alloy (SHX15 and 13X) and improved unalloyed (U10A - U13A).
One of the components of this tool is a plastic or wooden handle, attached to a narrowed conical shank. The part does not perform any important functions, does not affect the quality of the file and serves only for ease of use by the employee. If such a handle falls off, it makes absolutely no sense to throw away the tool - just replace one part with another.
The quality and scope of the file directly depends on the type of notch applied to it, as well as the configuration of the teeth. Milling methods are most often used in the manufacture of files for the application of such teeth, drawing, notching or turning, however, recently manufacturers have begun to produce files mainly with teeth, notched on a special machine.
Modern files are characterized by different types of notches, however, the most common are the following.
The size of the tool teeth directly depends on the size of the notches (teeth the bigger, the smaller the number of notches in the file). Based on the size of the teeth, the tool is divided into numbers from 1 to 5.
Numbers 0 and 1 correspond to the largest teeth. This type of tool is usually used, if the employee needs to quickly get rid of a large layer of working material. In such cases, this type of device is simply irreplaceable, however, it also has a clear disadvantage - the accuracy of machining the part is quite low. Numbers 2 and 3 correspond to medium-sized teeth, and the tool accurate in work is used at interaction with materials of small density, when to remove 0,015 – 0,05 mm from the surface of the part. And here already for finishing of material use files number 4 and 5 with high precision machining, popularly called velvet (div. Photo).
According to the scope and main purpose of the file is divided into several major categories:
The name of the latter type of instrument speaks for itself, but other categories should be considered in more detail (also presented in the form of a table in the photo).
The most common are files. There are more than ten subspecies, example, flat, square, oval, round, semicircular, hacksaws, triangular, etc.. d. All these types of files differ in the notch and the small length of the bar. They are also equipped with a double notch, however, the edges of flat-type tools can be single. Needles are mainly used for processing small parts or bottlenecks, when ordinary metalwork tools do not allow it.
As for the rasps, they are divided into three subspecies (general purpose, shoemakers, ungulates) and have large notch teeth and long length. Round and semicircular rasps are most often used for work, as well as flat with a sharp or blunt tip.
Locksmith files for special purposes are mainly used for industrial purposes, as their main purpose is to eliminate large gaps when fitting grooves, as well as the curvature of the surface when working with non-ferrous metals. Based on its purpose, use flat and grooved files, as well as bars.
General purpose tools are most often used during general locksmith work. They come in different lengths, can have a different shape of the bar and literally any of the numbers of the notch. The latter for devices of this type is performed by the notch method, ensuring the formation of cross (double) notches.
The shape of the bar plays an important role in the work process, after all, it is for her and you can determine the scope of the file. According to the method of use, the devices are divided into:
The service life of the device directly depends on the manufacturer, the quality of the notch and heat treatment.
There are many types of files, which can confuse even an experienced professional. If the tool is selected for home use by the average person, do not work on wood or metal professionally, it is not necessary to buy files of all shapes and sizes. Most operations with household materials can be performed flat, round and triangular tools, but they must all fall into the same category (files, rasp and locksmith files of general purpose).
For the home workshop, professionals recommend choosing files with a uniform steel surface color with a clear notch without any visible defects (div. Photo). This tool will be high quality and will last a very long time.
Files on metal
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