Round files typically consist of a long tapered body and a pointed square tang at one end for attaching a handle. The body of the file is cut with a series of parallel ridges which remove material from the workpiece when the file is drawn across it. These files are most commonly used to deburr or remove material from the inside surfaces of cylindrical workpieces or to cut half round grooves.
Round files are available in a large selection of sizes and tooth pitches to suit a variety of applications and materials. Files have been used to shape and finish metal and wood objects for thousands of years; archaeological finds of Assyrian iron rasps, for example, date back as far as 7, BC. Although modern machining techniques have largely replaced filing as a primary shaping method, files are still standard hand tools for most professional artisans and hobby enthusiasts.
The round file is a fairly specialist type and is used almost exclusively to remove material from the inside surfaces of cylindrical workpieces.
The part having no teeth is called as heel. Thick side of file is called edge and its lower end is known as tip or point. While making a selection of file for a specific job, some important points should be considered.
In other words, we can say that files can be classified into the following categories:. A file is measured according to its length. This length includes whole file except its tang portion i. In fitter trade, file of mm to mm length are used. This file is of rectangular cross-section in shape. It is made slightly tapered both in width and thickness. Double cut teeth are cut on the face and simple-cut teeth are cut on the edge.
These are used to reduce flat surface by filing of finishing. This type of file has a round section. It is used for rubbing or finishing keyhole of small diameter. It is a file which is on the side and curved on the other side. Double cut dents are cut on it and like a round file, it is also tapered. With this file, the damaged hole can be set in order again. It is triangular in shape. It is also known as three square files.
It is square in shape and is somewhat tapered. Filing of rectangular, square groove, slots and key-way is done with this file. This file is almost similar to the flat file. It is used for filing of internal right angle side of a job. It is also called safe edge file. Its shape is like the edge of a knife. It is generally used in the lock industry for making keys.
Following are the different types of file tools according to the basis of the number of teeth:. In this type of file, teeth are of big size and less in number. It is used for cutting soft materials because its cutting is rough.
Because of rough cutting, it cannot be used for hard metal. Teeth of this file are comparatively smaller than those of the rough file. These teeth are of triangle shape and are in a bulging state. It is used for jobs of woods, plastic, fiber, hard rubber, and job of horns and hoof of animals.
Saif M. He completed his engineering studies in and is currently working in a large firm as Mechanical Engineer. He is also an author and editor at www. Thank you so much Sir…. Notify me of follow-up comments by email. Notify me of new posts by email. This site uses Akismet to reduce spam. Learn how your comment data is processed.
Files Tools and Its Types Contents show. Files Tools and Its Types. Parts of a File. Types of File Tools 3. Classification According to Length. Classification According to Shape. Classification According to Grade. Methods of Filing. Precautions of Using Files. Applications of Files. Download now. Glad you liked it. Thanks for reading our article. Really nice explanation. Keep up the good work Reply.
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