Note: The hardness of your material will affect the surface finish and speed of cut. Alternately, coarse files have larger teeth with fewer teeth per inch. Sean has a B.S. There are four standard types, see Figure 2. They are used for smoothing and blending. Accessed 28 Nov. 2020. Pressing too hard will dull the file more quickly. The effectiveness of a file is based on picking the best combination of cut and coarseness for your specific application. 1.833.282.3730. In this technique, the file is turned sideways and is grasped on both ends, see Figure 6. The best lubricant for a hand file is good old-fashioned blackboard chalk. Most people who haven’t been trained will file in a back and forth motion. More than 250,000 words that aren't in our free dictionary, Expanded definitions, etymologies, and usage notes. Many of us know that to sharpen crampons you use a "bastard file". Double-cut files have two sets of diagonally-cut teeth. Rookies will file away for hours while a master will get the same job done in half the time. +++ It's simply "bastard" as a mill-file, sometimes millenicut, is a different grade of cut. The second-cut files, 12 inches and longer, are double cut. Normally, a standard Mill Bastard file is used for drawfiling, but where a considerable amount of stock has to be removed, a Flat or Hand file (Double Cut) will work faster. Draw filing is a modified technique that should only be used with single and double-cut files. He has over 7 years of product development experience in a variety of industries ranging from medical, automotive, furniture, consumer products, and defense. Pillar files are used to file in slots and keyways. As a result, when those teeth are rubbed across another piece of softer material, the teeth will dig into the material and pull bits away. Start your free trial today and get unlimited access to America's largest dictionary, with: “Bastard file.” Dictionary, Merriam-Webster, But the name obviously intrigued me. Zeeland, MI 49464 Your email address will not be published. Hold the file by its handle with your dominant hand. Length does not include the tang.. Below are some common techniques for how to use a file. The teeth will clog if used with soft materials. Files do not include a handle but do have a tang that fits into a handle. These teeth run parallel to each other and extend the length of the file’s face. Just like a saw, it cuts material using teeth. The size and spacing of a file’s tooth correspond to the file’s coarseness. It will remove slower than a rasp and give a finer surface. From Nicholson’s “The guide to files and filing”: They are used for very large removal of soft materials such as wood or plastic. Keep in mind that the finer the file the more often it will need to be cleaned. What made you want to look up bastard file? After all, it’s nothing more than sandpaper on steroids. So years ago I went to the local hardware store, asked for a bastard file, payed for it, and have been using it ever since. With your opposing hand place your palm onto the tip of the file. Not enough to search for it on Wikipedia until a few minutes ago, when I got me answer:So all "bastard" means in this context is somewhere between coarse and smooth. They are designed to cut metals rather than wood. in Manufacturing Engineering from Western Michigan University. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! The file is then sawed back and forth to remove material. The pattern directly affects the character and is referred to as the cut of the file. 'All Intensive Purposes' or 'All Intents and Purposes'? A mill bastard is a type of wood file. Round files are used for … A typical hand file is made from a bar of high-carbon steel with its teeth pressed, cut, or raised into the steel. Along with the size of the tooth is the pattern of the teeth. The teeth will dull when used against hard materials. They are good for quickly cutting hard materials. In the opposite direction the rake is much shallower so the teeth push away from the work surface vs. digging in. A hand file is essentially a hand saw with a very wide blade. Like any tool a file needs to be cleaned before, after, and sometimes during use because pieces of cut material fill in between the teeth of the file. Can you spell these 10 commonly misspelled words? These files are good for both soft and hard materials. Let’s go over the basics. In one direction the angle is sharp enough to dig into softer material in order to remove it. The reason sawing back and forth is acceptable in this case has to do with the diagonal teeth of the single and double-cut files. Please tell us where you read or heard it (including the quote, if possible). The easiest way to pick a combination is to determine how fast you want to remove material and what you want the surface finish to be. Below are some useful combinations. As the file is drawn back and forth newly cut material forces the material off the teeth. Using the file in such a way can damage the file because it will round over the top of the teeth dulling the file without doing any work. Bastard-cut files 6 inches and longer are double-cut. Test Your Knowledge - and learn some interesting things along the way. Bastard file definition is - a file having teeth of a grade next finer than coarse. in Engineering Design and a M.S. After one pass most of the spaces are filled with small pieces of material. Both file and saw teeth have an angle relative to the work surface known as a rake. One way to prolong the life of a file is to use a lubricant while cutting material. In effect, the only time the file comes in contact with the work piece is on a forward stroke, see Figure 1. With the double-cut variety of file both strokes of the file are cutting into the material reducing the chance of dulling. This technique is used when material must be removed slowly, see Figure 5. Your email address will not be published. Your palm is used to help press down while your dominant hand is used to guide and control the direction of the file. Required fields are marked *, 201 West Washington Ave. Suite 230 See more. Post the Definition of bastard file to Facebook, Share the Definition of bastard file on Twitter. Medium Speed/Good Surface (Hard Material): Use a single-cut medium or double-cut fine. Medium Speed/Good Surface (Soft material): Use a coarse (bastard) file. Well, I hate to break it to you but knowing how to use this basic tool is a clear sign of being a veteran. Rasp-cut files have a pattern where each tooth is individually formed. Delivered to your inbox! It uses the same general technique as before but rather than applying pressure with your palm you apply pressure with your thumb only. Curved-cut files have teeth cut in a curved contour across the working surface of the file. The interlaced teeth create a diamond-like pattern which allows the file to cut twice as fast as a single-cut file. Fine files have small, frequently spaced teeth which don’t remove a great deal of material per stroke. Cleaning a file is a sign you know what you’re doing. Written By: Sean Derrick – Product Development Engineer | This is both inefficient and potentially damaging to the file. The correct technique is to push the file forward to make a cut then lift the file off of the work piece when the file is drawn back. They are separate, disconnected, and typically stand much taller than other cuts. Everyone knows how to use a hand file, right? The second reason filing back and forth is not wise is that it will clog the file and become less efficient. This gives the user the most amount of control. Single Cut — Surface has one set of diagonal teeth and is often used with light pressure to slowly remove material and sharpen tool-cutting surfaces. I’d like to add an addition about draw-filing. All others are single-cut. Learn a new word every day. Slow/Good Surface (Soft Material): Use a medium file. By lifting the file after a cut it allows for the cut material to fall out from between the teeth and make room for the next pass. These larger teeth remove more material per stroke and therefore cut material quickly. Single-cut files have a single row of diagonal teeth. Fast/Rough (Soft Material): Use a rasp when you want to hog out and obliterate material. When a file is pushed forward the cut material collects between the teeth of the file. However, this roughing down leaves small ridges that will have to be smoothed by finishing with a Single Cut Mill file. The character gives special properties to the file such as making a file cut faster or slower independently of its coarseness. To clean a file use compressed air, rags, or a file card brush (see Figure 7) to prevent material build up. Rather than press hard for aggressive cuts switch to a more aggressive (coarse) file. After the teeth are made the bar is heat-treated making it harder than most other materials it is likely to come across. Without removing that material the next pass will be less effective. As a general rule of thumb, using two hands are preferred.