Why do you need a divorce of the teeth of a saw. Why tighten the canvas on a manual hacksaw, and when you need to do it?

Carpentry, carpentry, glass and parquet work: Practical manual (11 pages.)

The easy it is to make the divorce of the teeth, the more extensive the sawing place. If the divorce of the teeth is not wide enough, then when working, the highest part of the canvas will heat up during the scarrow of the edge of the saw. The saw for this reason expands, which leads to jamming. To avoid such a phenomenon, the teeth of the hacksaw are diluted and the width of the divorce is kept under control. The presence of diluted teeth makes a gap between the hacksaw cloth and the surface of the saw. The saw moves simple, without friction and, accordingly, without heating. In the absence of a gap, it begins to involuntarily deviate to the side of the suitable direction of the saw.

The hacksaw during operation is subjected to various loads, as a result of which the teeth are dull. In addition, they change their position. All this leads to the fact that:

  • the effectiveness of the use of the tool is reduced;
  • It is required to spend more time and effort on the process of cutting;
  • The accuracy and quality of the cut is deteriorated (Zapubin forms);
  • there is a danger of using a stupid tool.

A saw with dull teeth must be sharpened. Determine what has come to process the tool, you can according to the following factors:

  • The hacksaw during operation makes a characteristic sound (with constant operation, it is easy to determine its change);
  • The tips of the teeth were opened;
  • The tool has lost its previous efficiency and quality of sawing.

When these situations arise, the tool is necessary to sharpen.

Why do you need to breed a saw

Before proceeding with the sharpening of the saw, namely this operation must be carried out after its purchase (since in most cases the saws are sold not sharpened) should be correctly diluted. And it is worth noting that this procedure (for the effective and professional use of the tool) is performed at a frequency of one or two years, since not divorced and not sharpened saw, it can simply negate all your efforts and spoil the work begun.

As a result of the sawing of the saw, its teeth are bent in opposite directions. Even and odd, one in one, others in another.

Why are we doing this? And in order to cut the width, there was at least one and a half to two times more than the thickness of the saw blade itself. It is this proportion that provides us with the necessary minimum value for comfortable work, allowing you to avoid clamps and “snacks” of the canvas. The canvas will bend and the cut will turn out at best in the wrong way in the initially planned line, in the worst, the canvas will simply not move from the place, no matter what efforts you use. In order to avoid these unpleasant moments in the process of work, in fact, “divorce” is used. It can be carried out through several ways. The easiest is the bend of teeth in opposite directions, using ordinary pliers. In any case, the main thing is to remember that the “divorce” must be carried out, observing one rule. the clove to the left. the clove to the right. And so along the entire length of your saw, starting from the first clove and ending with the last.

Sharpening of the saw

Working with a saw requires caution. Sharpening of a saw can also lead to injury. What can be done to minimize the risk of cuts? You need to make a temporary cover from a rubber tube. The tube is cut in length and used as a cover for a saw’s teeth. It will be difficult to cut with such protection.

Sharpening of a hand saw. The task is not easy. To sharpen dust, you need to fix it with two hard wood clamps. Between the clamps, put a strip of cardboard and fix the clamps with nails below. The saw is placed in the left slit, and the design is squeezed out using a vice. Now it’s easier to sharpen dust. Smach each tooth with a triangular file and the same number of movements.

Tools and devices, preparation for work.

Wood hacksaw canvases are made of corrosion.resistant alloy steels with a hardness of 40-50 units according to HRC. Thanks to the use of such material, the tool retains its qualities, even if it was not used for several decades. To return to duty, even an old rusty canvas is enough only to sharpen and dilute the teeth, and this will require some tool and equipment. Immediately make a reservation that modern hacksaws with a hot gear edge (where the colors of the runner are visible) do not sharpen and do not get divorced, except after annealing the canvas.

Reliable fastening of the hacksaw is provided using a piece of board, on the end of which it was made parallel to the wide side. Saw should be done with the same hacksaw, which is processed, the depth is about 70–80 mm. The canvas should be inserted into the cut with a butt down so that the teeth protrude from a saw to a height of at least 50 mm. The wooden knock itself needs to be squeezed in a vice, or fixed to any stationary object, immobilizing the canvas with a wide and thin wedge

need, divorce, teeth, canvas

As a further improvement in the cuset, you can use such a holder to quickly fix the saw blade

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Table Saw Basics: Closing the Throat Gap

Metal processing of such hardness is possible by manual and mechanized way. In the first case, you can use files with a firmness of 60 or 65 HRC, or diamond files. During mechanical processing, an electrical sharpener is used with a white electrocorundum stone installed on it on a volcanic bundle. The optimal circle diameter is 120. 160 mm, it is desirable that the thickness does not exceed 8 mm, otherwise it will be necessary to refuel the end to the plate to a plate profile. The granularity of abrasive particles should be p 120–140 or higher.

To carry out the divorce of teeth, a tool called wiring is required. This is a thin plate on the handle, having one or more transverse incisions of different widths. The butt of the hacksaw should be included in one of the cuts so tightly that the slope of the handle relative to the canvas is at a right angle /- 2 °. So that the divorce is uniform and symmetrical in both directions, an angular adjustable limiter in the form of a metal arc is attached to the wiring.

Sharpening of a hacksaw

Also in the arsenal you must have the following types of files:

  • flat and rhombic with a notch of medium size;
  • triangular file;
  • triangular with velvet notch;
  • Nadfili with notches of different calibers.

For sharpening, use a special device that allows you to fix the canvas at the angles of 45 and 90 degrees. If you need to sharpen a transverse hacksaw, act as follows:

  • The canvas is fixed at an angle of 45 degrees;
  • Sharpowing is carried out by a trihedral file with an angle at a top of 60 degrees;
  • The file is directed to the hacksaw tooth at an angle from 60 to 75 degrees;
  • First, several movements of the file from themselves are treated with the left faces of odd teeth;
  • After that, the hacksaw is turned over and the left faces of even teeth are processed.

When sharpening the longitudinal hacksaw, they act as follows:

  • The canvas is fixed vertically;
  • For sharpening, a rhombic file with a fine notch is used (you can use the file);
  • During sharpening, the file is directed strictly parallel to the table;
  • The rest of the process is similar to the previous.

Bences that appear on the faces of teeth need to be removed using an emery bar or file with a velvet notch.

The process of sharpening the saw for the first time is quite difficult, so it is better to conduct it in complete silence and with maximum concentration. It is worth doing this several times, and then the thing will become familiar and will go “like clockwork”.

Wrestling for saws

Ribbon saws are often sold in an unsteady state. A professional tool must be diluted first, and then sharpen. Once every two to three years the process of wiring is repeated. Incorrectly divorced and poorly sharpened saw can ruin all the work.

How to sharpen and dilute the saw correctly? First you need to understand the essence of these processes. After all, the preparation of a manual tool is different from the preparation of electrical. Manual saws have a completely different form of teeth and work technician.

How to brew the teeth of a hacksaw?

A fairly common issue can be called how to dilute the teeth in a hacksaw on wood. If they are shifted in one line, the cut turns out to be narrow, and the working part stucks in one place. In this case, rapid heating of the metal occurs, due to which it begins to expand. To carry out the divorce of teeth, it is recommended to use special mechanisms. Recommendations for the work on the work are as follows:

need, divorce, teeth, canvas
  • The saw is clamped in a vice for reliable fixation. It is possible to exclude the likelihood of damage to the working part due to the use of plywood as a lining.
  • All cutting elements are bent through one alternately at the recommended angle.

When considering how to make a scabbard, we note that several elements rejected by a larger angle can cause the complication of sawing.

Divorce of two teeth right away

Machines that divorce two teeth are immediately made of the following types: along with a sharpening machine; separately, only a divorce machine operating from the engine; Separately, only a divorce machine with a manual feed in the form of a wheel (photo 1) or lever.

Illustrations see the PDF version of the magazine

Divorus machine with manual feed in the form of a wheel

The machines for this option are most advertised by sellers, because they seem to facilitate the work of the sharpener, conducting the divorce of two teeth immediately on both sides of the strip saw. This is a very good advertising “noodles” for the ears of those who have never made tape saws on their own. Those who at least once prepared a saw for work know very well that each tooth on the saw is divorced individually. The tooth is always diverted with a pusher to a value, greater than the necessary divorce. When the pusher is withdrawn back, the tooth always shifts to some value back. over, even for one saw, it can fluctuate backing back of each specific tooth within 5. 25 indicator units. Therefore, the sharpener almost always has to make two or three presses, often to different values ​​of the indicator each (that is, with different effort), to obtain the required divorce value. There are also teeth that spring worse than others and already at one or two presses before the indicator of the indicator, as on well-springing teeth, remain on values ​​that are large than the necessary divorce, and they have to be specially bend back.

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Now you should understand that it is just impossible to make two teeth well with one pressing. But the machines are well sold, and some are even satisfied with the result. Drawing a saw on such a machine, you always need to know: you will never get a guaranteed good divorce of a strip saw. Divorce will always be unpredictable. With small feeds of the carriage, a accidental batch of a drank with more or less equally spring.loading teeth, a new clean mechanism sometimes manages to saw normally. But problems necessarily arise later. But they begin to look for the reason for these problems anywhere, but not in the divorce, believing that he is very good. For almost all such divorce manufacturers, even indicators do not put. Explaining this by the fact that you install everything once, and then only breed: the hammers always beat the same and what to check here. And you check and see for yourself what a large scatter in the values ​​of the divorce actually.

In addition, the accuracy of the resulting divorce in these machines is strongly affected by the same reasons as in the classic ones: the getting of dirt into the mechanism, the risks on the pusher and support plates. The height of the diluted part of the tooth is especially affected.

Saws. Sharpening and wiring saw

The saws on the device are divided into arrow, two.handed, hacksaws and chain saws appeared relatively recently. The saw is a steel canvas with teeth chopped at one edge. Teeth cut the wood fibers and remove the cut chips. On two-handed saws, through a certain number of cutting teeth, sometimes dicks-discardes of sawdust are made. Such teeth do not drag.

I will express my subjective opinion about saws, in relation to tourism. All of the above saws were tested by me in camping conditions. Perhaps my opinion is erroneous, based on many years of habit of sawing certain saws.

Luching saws. In a beam saw, the canvas is pulled with a wooden machine or metal ray, which creates convenience for sawing one. Actually the convenience ends on this. The whole design in the assembled form is inconvenient for carrying in a backpack due to its bulky. You can certainly be transferred in a disassembled form, but the likelihood of loss or breakdown of the components of parts increases. Then, I experience some kind of internal rejection of prefabricated structures-it is good during transportation, but to collect and disassemble every day albeit simply-there is no longer! I tried to carry only the canvas with me, and make a beam on the spot from the branch. I didn’t like it either. Even in the taiga you will not immediately find a suitable branch, then it must be prepared, and collect the saw. Somehow troublesome, but in winter it is almost impossible-raw branches break in the cold like dry. Another inconvenience: there is a need to file a fallen tree from below (when sawing from above, a tree clamps the saw). the beam does not run everywhere.

Two.handed saw. Saw saw with two handles. Optimum saw for forest campaigns in the cold season. And in the summer on long.term basic parking lots it’s nice to have a two.hand. If the weight and volume are not critical, it is better to leave the saw as it is, not to redo it in a tourist version. For long trips, it will be good to slightly reduce the size of the saw. But here we must not overdo it, do not make too narrow and short canvas, do not turn into a file for a jigsaw. I have a two.handed saw from the handle to the handle 800mm, the largest width 90mm. With a saw of such sizes, you can cut logs with a diameter up to 30-35 cm. The saw does not require preparation. I took it out of my backpack, combined it, and you have stupidly saw. no need to collect anything in the cold and think. In winter, when the workpiece of firewood often occurs in the dark, the simplicity of the design will not hurt. It is quite possible to saw two.arc. Czech. a strip of dense fabric folded three times and prostrated. Three visas are sewn to the case. The rag cover is more practical. Covers of PHV and rubber hoses in the cold are tanned. There is no place in the backpack. I put the saw in the backpack vertically, from the side.

Hacksaw. Saw blade with one handle. I have a homemade hacksaw, from a piece of two.handed saw. It is used both in cold weather and in the summer. In the fall, with night by the fire. In winter, in solitary exits to the forest. In the summer, on the alloy on the taiga litter rivers. With a hacksaw, it is comfortable sitting in a boat, cut the trees falling into the water. Can be sawed from almost any position. The only restriction of the use of a hacksaw is logs of large diameter. It is convenient to cut snow bricks with a hacksaw. Czech. from tarpaulin, in the form of scabbard.

need, divorce, teeth, canvas

Chain Saw. Folding saw, consisting of many links-subyes interconnected by rivets. Pilage advantages: small dimensions and weight. The ability to cut one. actually for this, apparently created. Significant drawback: narrow specialization. The chain saws logs well 6. 12 cm. It makes no sense to cut logs of smaller diameter. it’s easier to cut off an ax. Large diameters of the saw simply will not master physically. With a roll of sushina alone, the tree strives to fall on the sawtster.to. Sawed is made from the opposite side of the tree. It is necessary to periodically stop sawing and check the strength. The reliability of the saw largely depends on the quality of the rivets. over time, it is possible to grind and fall out of rivets. It is convenient to use the top under the chain saw cover for a chain saw.

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For all saws, I decided to conduct a test so to speak in the laboratory conditions. in my yard. For the experiment, I took a dry pine log with a diameter of 14 cm. not thin, and not thick. In turn, I sawed down with different saws on Churochka. He sawed, slowly, as he did in the forest, when harvesting firewood. All saws were sharpened. For each saw, I created optimal conditions for work. A ray, two.handed and a hacksaw sawing on the evil. For the chain, laid a log on the ground, losing one edge on a churochka. The cut.off of time made a stopwatch. Here’s what happened:

Couches Have Too Many Names

Hacksaw. 46 seconds. Large with a large tooth. Drinking is quite convenient.

Two.handed saw. 52 sec. Drank one, without the use of delay and other devices. Together it will be clearly cutting faster. It feels like it is easier to saw two.handed than other saws, even one.

Luchok. 53 sec. Small.tooth canvas. It saw relatively easily.

Chain saw. 56 sec. Feeling, I had to make the most efforts.

Saws for the longitudinal and transverse sawing of wood are characterized by the shape of the tooth. For transverse sawing, the teeth of the saw are made in the form of an isosceles triangle. For longitudinal sawing. a oblique triangle “Wolf Tooth”. There are also teeth for mixed longitudinal sawing. In tourist campaigns, sawing wood along the fibers, practically does not need. The main task is to blame sushin and cut into the right amount of chocks (logs). The efforts spent on sawing largely depend on the sharpening and wiring of the teeth of the saw. In the process of sawing, teeth are blunting, t.e. the edges of the tooth are rounded. The top of the tooth is stupidly stupid. Drink one torment with such a saw. a lot of effort and time for sawing a log of even a small diameter is spent on.

Before you start preparing a saw for work, it is examined. in what condition of the teeth, is there a divorce. In dumb teeth, a light strip is visible along the edge, at a sharp.sharpened tooth, the edge is not visible. You can also determine “by eye”, the severity of any other cutting tool.

If the saw is old and the height of the teeth is very different from each other, they are aligned with a file clamped in a special wooden block. Teeth are aligned, naturally to sharpening, after wiring.

Device for aligning the height of the drain

Drawing of teeth. For more free movement of the saw canvas in the boot, the teeth are divorced. The teeth take turns bent in different directions on the same value using wiring. Bend a tooth with wiring about the middle of the height of the tooth. Wiring. a device for wiring the saws of the saw in the form of a plate with a slot. Wiring of teeth, in extreme cases, can be made by a divorce key. It is recommended to breed more for soft trees of trees more, but for solids less, but this is unlikely to suit us. you don’t have to choose particularly in the forest. trees are found of different densities and humidity. With wiring, you need to experiment a little and choose the optimal, approximately 0.3-0.5 mm on one side. In any case, the teeth should be dedicated no more than the thickness of the canvas on both sides. It is better to make wiring before sharpening.

Комментарии и мнения владельцев 28

You bought a saw for the dissolution of sheet material, such saws do not have a shot of chips (sawdust), to cut massive blanks you need to select a saw with a good lifting of the chips.

Why do this is not a classic saw disc. These discs do not really need a divorce of tooths, it is achieved by proper positioning of the tooth and its sharpening angles that in the budget segment of the saw discs very suffers from the effects of the teeth can turn into consequences from simply poor cut to painting these teeth and jamming and jamming and jam Disc isolation of the disk as a whole with all the ensuing and for a saw of firewood, the speed of the disk needs less and with these manual only wood.fiber slab and gnawed and for normal operation and saw you need at least console and at least with a variator (the disks are naturally there and the pill of the rays)

And you yourself read the article what you cite in the text?Yes, you need to make a tooth, but you already forgot about what saws we were talking at the beginning of the paragraph.Choose the disk correctlybobrenok-kos.ru/diski_pilnye

Small disks should not be used when working with longitudinal cuts, this is fraught with a decrease in the speed of work, a significant overheating of the device and such unpleasant consequences:

The saw disk begins to inflate; the saw often goes sideways from the cut line; in the overheating areas, the material begins to “swell” and the friction increases significantly; the saw is deformed and more resembles a propeller than the cutting surface.Stroy-Podskazka.ru/Instrumenty/Pily/Prodolnye/

Or tell me where an example is given with a divorce of teeth with attacks not independent, but professional or from the factory?

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