It all starts with checking the distance between the teeth. It is designed to prevent the saw from wedging in the cut. It should be adjusted to the type of wood with which you most often have to work. If you have to work with hard wood, the teeth are set apart at a distance of 1.5-2 times greater than the thickness of the blade. For soft wood, the teeth of the hacksaw should be separated by a distance of 2-3 times more.
One of the key points in routing is maintaining uniformity. If the saw teeth are bent at different distances from the center, this will lead to permanent wedges and a deterioration in the quality of the cut and the speed of cutting wood. Therefore, it is recommended to use a device for setting the teeth, which is called “setting”. Thanks to the stop, it is impossible to bend the tooth to a greater distance than provided by the standard.
The teeth are divided into two groups through one and are bent sequentially along the entire length of the cutting side of the blade. First, this procedure is carried out for one group, in which the set teeth must be bent in a certain direction, then it is repeated for the opposite direction.
Required sharpening tool
To perform such a seemingly simple operation, you will need a rather impressive list of tools. However, if one of them is not at hand, you can try to find a replacement for it. What you cannot do without is a workbench with a vice, since only with their help the saw can be rigidly fixed for work. The rest of the list looks like this:
- device “wiring”, which, if absent, can be replaced with high-quality pliers. In this case, you yourself will have to determine the approximate distance from the center for each tooth;
- a sharpening bar with sandpaper or a set of files and files;
- additional light source;
- in some cases, you may need a caliper and protractor to make accurate measurements.
A separate mention is the method of sharpening hand saws using an angle grinder. In this case, you will need the presence of the angle grinder itself, a workbench and a pair of clamps, since the blade will need to be fixed horizontally.
How to sharpen a hacksaw on wood and spread the teeth
Hacksaws of various types are used in everyday work in personal plots, summer cottages, as well as during repairs in which natural wood is used as the main material. The saw requires periodic maintenance. At a certain moment, you need to sharpen the hacksaw on wood, since it began to perform its function worse than before. In order not to spoil the canvas and return the tool to its former performance, you need to follow a few simple tips.
How to Sharpen a Handsaw
How to determine when it is time to sharpen a hacksaw
In order not to shorten the service life of the hacksaw blade, it is necessary to sharpen it only when it can no longer perform a high-quality cut, or requires more effort while working with it. The main signs of a blunt saw are the following:
- the tips of the teeth are rounded, their shape is distorted;
- the sound of the saw has changed: there is a feeling that the wood is not cut, but is torn along the fibers;
- the cutting speed has decreased compared to a new hacksaw;
- nicks and scuffs began to appear on the cut;
- hacksaw periodically wedges even with an even cut.
If at least one of these symptoms appears, then the hand saw needs service. This includes both direct sharpening of the teeth and their correct setting.
Do-it-yourself saw sharpening
The saw is prepared for sharpening by fixing it in a vise, the jaws of which should ideally be made of wood so as not to damage the saw surface. Step-by-step instructions for sharpening a hacksaw on wood with your own hands are as follows:
- The hacksaw is fixed as close as possible with the teeth to the jaws of the vice, but so that their distribution is not disturbed when the wrench is clamped at an angle of 90 ° to the surface of the workbench.
- The file is taken in the working hand with the handle, with the other hand it holds the tip from the back. This will distribute the effort evenly.
- Sharpening a conventional hand saw is performed at an angle of 15-30 ° to the tooth. If the wear is not too strong, the “native” sharpening angle will be clearly visible.
- The angle of the file to the blade should be about 30-45 °. To do this, you need to become so that the working hand is below the auxiliary.
- The file should only move away from itself, with the same effort and number of movements for each tooth. For a sharp file, 3-5 strokes are usually sufficient to straighten a single tooth.
- Thus, one side of the canvas is passed, after which it is turned over, fixed in the same way, and the actions are repeated for the second side.
If, when performing sharpening work, apply an uneven force or make a different number of movements with a file, this can lead to displacement of the teeth in relation to each other, distortion of their size and shape. Ultimately, such a hacksaw will require professional resharpening, or even completely unsuitable for further use.
General requirements for sharpening
Sharpening a hacksaw is a rather painstaking process in which accuracy is important. To make it easier, you should only use good files and needle files that are sharp enough. If the saw has to be sharpened frequently, the best solution is to have a separate set of tools for the job. Before sharpening, it will not hurt to look at the teeth of the hacksaw. If their shade is darker than the canvas, then they are hardened. Sharpening such a hacksaw on wood will not work.
When sharpening at home, the metal should be removed evenly. An equal number of file passes are made for each individual tooth, regardless of how worn it was before the correction. In this case, you must not change the sharpening angle set by the inclination of the file, or rotate it around its axis. Movements should be made strictly from oneself, since it is with this technology that the effectiveness of removing the metal of the hacksaw is achieved, and the employee can confidently control the tool in his hands.
In order to avoid additional difficulties during sharpening, the saw blade should be firmly fixed in a vice. It is desirable to have source of direct light, which will allow you not to peer at the results of the work.
After the setting has been made, the hacksaw must be checked for the same height of the teeth. Since the force could be applied unevenly to it, there is a chance of the appearance of teeth with less wear, which will protrude above the rest.
To identify these teeth on a hacksaw, you can use a simple method. It will need thick paper or cardboard along the length of the cutting blade. The sheet must be laid on a flat surface, for example a table, well leveled, and then forcefully press the cutting part of the blade against it. Prongs that are knocked out of the general row will make deeper dents in the surface.
This makes them easy to spot and correct before sharpening. To remove excess height, various files are used. During this work, you should strive to preserve the shape of each hacksaw tooth as much as possible.
How to sharpen a hacksaw on wood
How to check if the saw is sharpened correctly
After the end of the process of sharpening a tool for working with wood, it is worth checking for light each tooth of the hacksaw. If shine is visible, the sharpening is done correctly, if not, then it is worth going over the “suspicious” teeth again. You should also look to see if the teeth on the blade have the same height. If they are higher or lower, this will lead to a decrease in the quality of the cut, the wear of the blade will be unevenly distributed.
Has the saw been sharpened correctly?
As a result, when sharpening a hacksaw blade, you need to adhere to the following recommendations:
- The blade must be securely clamped in a vice without the slightest sign of slipping during the process.
- The workplace should be as illuminated as possible, this will not only allow you to work normally with the tool, but also protect your eyes from premature wearing of glasses.
- The notch depth of the selected file depends only on the degree of bluntness of the teeth. the duller, the more “powerful” the tool is needed.
- Sharpening of metal occurs only when moving away from oneself and only in one direction. This prevents hand injuries from accidentally touching the blade during movement.
- After the end of sharpening, it is necessary to check the quality of the work performed, and in case of irregularities, it is better to immediately modify it than to suffer later in the process of sawing wood, especially hard species.
On a note. When using a hacksaw, you should regularly pay attention to its performance. This will save energy, nerves and the tool will last a very long time if handled carefully.
Any tool should be checked before and after work. Safety comes first! If with a hand tool, at best, there will be only a cut, then with an electric one, you can end up with a life-long injury. Therefore, it is recommended to inspect instruments before use.
All recommendations and warnings will help to properly sharpen any hand-held hacksaw for working with wood, and there will be no problems with determining the moment when it is worth doing.
The setting of the teeth is required to prevent the blade from getting stuck in the cut. The process consists in bending the teeth relative to the blade in two directions at the same angle and distance. As a result of correct routing, free gaps should be formed, which will help to simplify the movement of the blade in the cut when cutting.
The standard is considered to be wiring at a distance of no more than 2 mm. Depending on the features of the application, the bend is made as follows:
- for processing dry wood. from 0.3 to 0.5 mm;
- for raw wood. from 0.5 to 1 mm.
The selection of the bend angle is carried out on the basis of the following principle: a larger angle will allow you to cut with a wide kerf, and a smaller one. with more effort, but a smaller cutting width.
For bending, special devices are used. The canvas is clamped in a clamp, installed on the work surface. Then the teeth are carefully bent with a metal die to such a distance so as not to break them.
The wiring is done step by step as follows:
- Cuts are made as marks to determine the thickness of the web.
- The prong is fixed in the hole made and bent with a die to the marked stop point.
- A similar procedure is performed with all remaining teeth.
How to sharpen a hacksaw
To sharpen a hacksaw for metal or wood with your own hands, you need:
- Perform preparatory work.
- Determine for what purposes the saw is used.
- Grind with parameters that take into account the intended purpose of the tool.
Sharpening the saw with a file
Sharpening a hacksaw for metal or wood for longitudinal or universal sawing is performed in two ways:
- Direct. With a file at an angle of 90 in the horizontal direction to the blade, the layers are removed from the edges of the teeth. Then rearrange the canvas in the clamp with the reverse side and do a similar treatment of the distant teeth.
- Oblique. It differs from the straight method by the sharpening angle, which is 80. First, the teeth of one row are processed, and then the other.
To sharpen a multi-purpose saw, you need a coarse file or a diamond file. The choice of method depends on the peculiarities of processing workpieces and preferences of the master.
You can sharpen a hacksaw at home as follows:
- Choose a file with a triangular cross-section with special cuts for ease of turning.
- Fix the blade at an angle of 45-50 to the working surface.
- File in the direction parallel to the table at an angle to the teeth from 60 to 75 to sharpen.
To restore blunt teeth, first sharpen the odd incisors, and then the even ones. After the odd ones, the canvas is turned in the opposite direction and the even ones are sharpened.
Basic rules for turning:
- the cutting tool should be moved evenly with the same force;
- to remove burrs, files with small notches are used;
- at the end of the work, it is required to check the sharpness of the teeth.
Sharpening a hacksaw for wood
How to sharpen a hacksaw with your own hands
How to properly sharpen a hacksaw yourself, if the need arose?
First you need to decide what material the working blade is made of.
Ordinary steel can be corrected independently, and teeth with victorious solders can only be processed on specialized industrial machines.
Some craftsmen, at their own peril and risk, undertake to sharpen a hacksaw with an angle grinder. but this is an unreliable and dangerous way.
To tidy up an ordinary hand hacksaw for wood at home, you need to determine the shape of the teeth, prepare everything you need, and be sure to observe safety precautions.
Hacksaw teeth set
The movement of the blade must be free, for which the saw teeth are set by the same amount.
To reduce the coefficient of friction and the clamping of the hacksaw in the cut, its width must be greater than the thickness of the working blade, otherwise the metal heats up and expands, which leads to the saw to jam.
The setting of the hacksaw teeth is performed by bending the cutters to the sides.
Using pliers does not allow you to get the same angle of inclination. such a tool can only cut firewood.
To spread the cutters evenly and get an even, neat cut, use a homemade setter.
To make it, you need a metal plate of arbitrary shape with a thickness of 2-3 mm.
In a simple version, several slots are made to indicate the thickness of the blade.
The prong is gripped into the hole and bent back until it reaches the selected stop.
In the second version, a cut is cut in the bar with a metal file, and two holes are drilled to install the limiter.
Turning the sector to the sides allows you to adjust the bend angle.
The figure shows a simple model and wiring with emphasis.
The diagram of the device is intuitively easy to manufacture and use.
It should be noted that the bend width has its own parameters.
How to determine when it’s time to sharpen a hacksaw?
How to tell if it’s time to sharpen your tool teeth.
An experienced owner knows when and how to sharpen a hacksaw, but it is not difficult for a simple layman to determine this moment on his own. Typically, the operating sound and the color uniformity of the cutting edge change.
Sharp cutters feature even cutting edge wear.
The following signs indicate the need to “correct” the saw:
sawing is hard and uneven;
the cut is uneven;
the web often gets stuck;
it becomes difficult to maintain a given trajectory.
In addition, a blunt hacksaw often gets stuck and requires a lot of effort to complete the process.
Sharpening a hacksaw with a sander or angle grinder requires skill.
Sharpening a hacksaw mechanically is much safer and easier.
Cross saws sharpen at an angle of 60 degrees with a triangular fine file.
Longitudinal with an angle of less than 60 degrees. a large file or a diamond file with a fine abrasive is used.
For the mixed type, you will need a coarse cut file or a fine cut diamond file.
For this operation, a special sharpening device is useful. a wooden block with a cut out socket to protect hands from cuts.
To sharpen a hacksaw using a grinder, you need a cutting wheel with a thickness of 1.2 to 1.4 mm, 115 or 125 mm in diameter. The angle grinder should have a speed control in the range of 5000. 8000 per minute. Installing protection is a prerequisite for using this method. As a rule, a homemade visor made of transparent plastic is used.
Hacksaw sharpening technology for wood
Correct sharpening of the hacksaw should maintain the working tooth profile.
It is determined by the following parameters:
step and height;
radius of curvature.
The sharpening angle can be set from 30 to 60 degrees, depending on the material.
So, for soft woods, the optimal indicator will be 50 degrees.
It is important to properly fix the blade in a vice. do not clamp it tightly, as the steel will vibrate under the file.
With the help of a workbench and a clamp, you can conveniently fix the hacksaw.
Sharpening is done by alternating double-sided sharpening. first, one row is passed along the left edges of all teeth.
Then the tool is turned over, and the pass along the right half of the cutters is repeated.
The one-sided method for dressing hand saws is not used. it is applicable only in relation to some types of knives.
How to sharpen a hacksaw
The question “How to sharpen a hacksaw with your own hands?” does not lose its relevance, despite the presence of a modern power tool in every home.
The saw is needed on the farm, irreplaceable on vacation, used for cutting boards, logs, chipboard.
It is also necessary for construction, carpentry and installation work; in the garden and workshop.
In the city, in the country or in the garage. everyone has this time-tested tool.
Why sharpen and when
With constant use, the teeth lose their sharpness, the cutting edges wear out, deteriorating the quality of the cut and increasing the time to complete the task.
Buying a new one will not correct the situation for a long time, and it will take no more than half an hour to restore the old canvas.
Timely sharpening of the hacksaw will restore the cutting ability of the cutters, and will allow you to always have a working tool at hand.
It is worth correcting the sharpness of the cutting edges at the first signs of wear, which may touch local areas and the entire working surface.
The dimensions of the set of the cutters also change, and this leads to jamming during operation.
General requirements for sharpening
Not every garage or workshop has a special machine for sharpening hacksaws, but it doesn’t hurt to tweak the tool with your own hands.
There are, of course, exceptions. hardened teeth cannot be sharpened.
Diamond drills and other tricks won’t help.
Such a saw has an increased resource and cannot be repaired, but replaced with a new one.
It is easy to identify hardened steel. it is black with a blue tint.
A grinder or a file and file is usually used as a hacksaw sharpener.
A prerequisite is to first perform the correct setting of the teeth, because the thickness of the hacksaw blade affects the cutting width, so the edges must be bent to the required width.