If you’re wondering what size file you need to sharpen your 325 chain, we’ve got you covered. In this quick guide, we’ll explain what size file you need and how to use it.
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Determining the size of a file for a 325 chain
The size of a file for a 325 chain is determined by the width of the drive links. The width of the drive links is measured from the inside of the plates to the inside of the plates. The width of the drive links is what dictates the size of the file.
What is the width of the chain?
The width of the chain is one of the most important factors in determining the size of the file. The 325 chain is a relatively narrow chain, so you will need a smaller file than you would for a wider chain.
What is the gauge of the chain?
There are two ways to determine the size, or gauge, of a chain. The first is by using a measuring tool called a micrometer. The second way is to use a chain checker, which is a specialty tool that measures the pitch and roller width of the chain.
If you don’t have either of these tools, you can still get a pretty good idea of the size by looking at the width of the chain. A 325 chain will measure about 3/8” wide. If you have an old chain that you want to replace, measure it with a ruler or caliper to get an idea of what size you need.
Once you know the gauge of your chain, you can determine what size file you need to sharpen it. A 4/0 (four-aught) file is for use on 0.325” pitch chains, and will work on all sizes up to and including 3/8” pitch chains. If you have a larger saw with a 3/8” or 0.404” pitch chain, you will need to use a 5/0 (five-aught) file.
Types of files
When working with a 325 chain, there are three main types of files you’ll encounter: depth files, flat files, and raker files. Each type of file has a different purpose, as well as a different way of being used. In this article, we’ll go over all three types of files and their purposes.
Round files
Round files are used to enlarge an existing hole or to deburr the inside and outside of a hole. The main use for a round file is to enlarge a pilot hole so that it can be reamed out to the correct size. For this reason, most round files have a tapered end. Round files come in bastard, second cut and smooth cuts. The bastard cut file is the most aggressive and is used for material removal. The second cut file is less aggressive and is used for deburring or final sizing of a hole. The smooth cut file is the least aggressive and is used to remove burrs from a hole or to give it a good finish.
Square files
Selecting the right file is important to getting a good cut and finishing quickly. A file that is too small will take forever and one that is too big may ruin your work. The size of file you need depends on the chain pitch.
If you don’t know your chain pitch, you can measure it with a ruler or a machinist’s rule. Place the ruler or rule on theInside of the cutter (the part of the cutter that faces the bar) and measure from the tip of one cutter to the tip of the next cutter. Do not include the depth gauges in your measurement.
If you are working with a new chain, you can also find the pitch stamped into one of the links. It will look something like 3/8″ or .325″.
Once you know your chain pitch, you can select the appropriate file size. If your saw uses a 3/8″ pitch chain, you will need a 3/8″ square file. If your saw uses a .325″ pitch chain, you will need a .325″ square file.
It is very important to use afile that matches your chain pitch exactly. Using afile that is even slightly too large can damage your cutters and cause your saw to work less efficiently.
Triangular files
Triangular files have three flat sides and come to a point. They can range from double-cut to safe-edge, and are meant for filing angular surfaces. You might use a triangular file for cleaning out the teeth of a saw or for creating bevels on the edge of metal.
Files come in all shapes and sizes for all sorts of purposes, but they can generally be classified into three categories: flat, half-round and round. Each category has its own unique advantages, so it’s important to choose the right type of file for your project.
Flat files are just as their name suggests: completely flat on one side and with a single-cut or double-cut surface on the other. These files are ideal for working with flat, smooth surfaces, such as wood or metal. You can use a flat file to remove burrs, expand openings or smooth out surface imperfections.
Half-round files are rounded on one side and flat on the other. These versatile tools can be used for both filing concave and convex surfaces. Half-round files are often used to contour wood or metal or sharpen serrated edges.
Round files are cylindrical in shape with a single-cut or double-cut surface. They’re designed for use on circular holes or concave surfaces and work well for enlarging existing drilled holes.
How to file a 325 chain
If your saw has a bar that is 16 inches long, then you will need to use a file that is four inches long. The most common file size for a 16 inch bar is four inches long. The file size is based on the length of the bar. if your saw has a bar that is 18 inches long, then you will need to use a file that is five inches long.
Filing a round file
When you’re filing a 325 chain, you’ll need a 5/32″ round file. This will give you the perfect depth and angle for the v-shaped cutters on your saw.
Filing a square file
To file a square file, you will need a guide, a vise, and a set of squares. You can purchase a guide, or you can make your own. To make your own guide, use a piece of stiff wire or a nail that is the same width as the file. Place the wire or nail in the vise so that it is perpendicular to the jaws of the vise. Next, take one of the squares and place it against the side of the file. The square should be flush with the top of the file.
Now, take your other square and place it on top of the first square. The second square should be flush with the bottom of the file. Once you have both squares in place, tighten the vise so that both squares are held securely in place.
Now you are ready to start filing. Simply hold the file at a 90 degree angle to the wire or nail and move it back and forth across the surface of the squares. Be sure to keep even pressure on both sides ofthe file so that it cuts evenly. After each stroke, liftthefile offof ́the surface ofthe squares and rotate it so that a new cutting edge is engaged. Continue filing until both sides ofthefileare dull.
Filing a triangular file
Use a triangular file to remove metal from the side plates of the 325 chain. The file should have a safe, comfortable handle and a relatively blunt tip. You will also need a second tool to secure the file. This can be a vise, clamp, or another person.
To file the 325 chain, start by securing the file in place. Then, using long, even strokes, work your way down the length of the chain. Be sure to apply pressure evenly to avoid creating jagged edges. Remember to clean and lubricate the chain after filing.