How to put a blade on a hacksaw for metal

Hacksaw device for metal

A hacksaw for metal is very often used in construction or repair work, if you need to make a neat cut on metal elements. The device of such a tool is not complicated, a hacksaw consists of a saw blade, which is stretched on an arcuate, or U-shaped frame. The blade on which the teeth are located is the saw’s working area. The work is done with two hands. The canvas can be fastened with a threaded clamp, while it is stretched and fixed with a special nut. And there is also a lever-type device, while the blade is inserted and removed using a lever, such hacksaws are more expensive and are universal. At the same time, it is very convenient, and the saw blade is quickly replaced. The main advantage of a hacksaw for metal, in contrast to an electric device, is that it can be used to perform work in any conditions without the presence of electricity. Maintenance of such a tool is very simple, and the hacksaw is also lightweight, which makes it easy to carry it with you even over long distances. The cost of a hacksaw will depend on the quality of the blade and the number of teeth.

How to choose the right blade for a hacksaw?

When choosing a hacksaw for metal, first of all they look at the teeth located on the blade. There should be no cracks or rust spots on the canvas. Its surface should be smooth. The canvas must be checked, bent, and then released, while it restores its original appearance. You also need to take into account that the more teeth on the blade, the easier it is to cut the object. The tool must be set at a 90 degree angle to cut large sheets. If this is not the case, then the depth of cut will be equal to the height of the saw. There are saws with blades at 45 degree angles. The canvas can be made of various metals, it is better to purchase a tool made of bimetal or with a hardened plate. The black cloth is of poor quality, after a few strokes, teeth begin to crumble or potholes appear. The hardened blade looks like a stainless steel with dark teeth. Bimetal canvases can be painted in any color or can have several shades. In this case, the tool lasts longer than with just black teeth. At the final stage, you need to check that the blade fits the length of the hacksaw, and after that you can purchase the tool.

How to cut correctly?

Before you start sawing, you need to familiarize yourself with how to secure the blade. In a one-sided view, the teeth point downward and forward from the handle. To install the blade, you need to unscrew the tension screw. After that, the canvas is installed, and tightened so that when touched, it rang. The main thing is not to overtighten so that the canvas does not break. Then, with your right hand, you need to grip the handle, and with the other hand, the vertical edge located opposite the handle. The blade is installed strictly along the cutting line of the cut, while the angle of inclination should be minimal. The blade should be positioned on the material at an angle of up to 45 degrees so that there is less noise or vibration, and the cut line comes out even. A cut of metal across at a right angle is performed in extreme cases, mainly if it is necessary to make a turn. When working, it is necessary to perform smoothly forward movements so that the hacksaw does not slide over the material, but clearly cuts into it. When moving forward, there is a slight pressure, and backward. the tool is weakened. When working, the largest swing is made, from one edge to the other so that the saw frame does not hit the metal. The arc should be level, not lean in different directions. If you make sudden movements to the sides, the canvas may break, since it is fragile to bend.

READ  What torque should a screwdriver have

Saw blade for metal for work

A hacksaw is a necessary item in the household. A hand-held tool is used not only in the country or in a private house, but also in urban settings. A hacksaw for metal is excellent at sawing wood or plastic material.

Where is a hacksaw used for metal?

Working with a hacksaw for metal does not require a certain experience, the principle of use is similar to a saw for wood. The main thing is to replace the blades in a timely manner, and to choose the right pitch of the teeth. Such a tool has fine teeth, so it can work not only with metal-like material, but also with other types of objects. A hacksaw is used to cut Styrofoam, Fiberboard, Chipboard, laminate or plexiglass. After cutting, the edges are smooth, so such a tool is considered universal, and differs in its cost. Sawing metal elements is not easy, while it is necessary to ensure that the saw runs smoothly and so that it is as smooth as possible. The canvas should bend, and not walk from one side to the other. Over time, due to friction against metal, the blade becomes dull and needs to be replaced. The blade cannot be sharpened.

How to make a metal saw?

In order to make a saw for metal, a steel workpiece is suitable. Such a blade can be made from broken hacksaws. First, a handle is made to pick up the cutters. To do this, you can use a regular metal tube. The end of the handle is grinded with a file, and made flat by flattening it, before that a sheet of cloth is placed in it. Then a special hole is made under the tightening, that is, a screw. Such holes are made on each piece of the saw. Cutters are formed after the blade is heated on fire. A file is made from the longest segment, that is, the edge is sharpened. And short cuts are sharpened for a variety of cutters, which are used in everyday life, for cutting cardboard or leather materials. If you sharpen the end parts of the debris, you can get a small chisel. And by making a hook at the end, you can use the tool as a cutter for various materials.

How to choose a hacksaw for metal?

You cannot always count on the advice or persuasion of the seller, so you need to be able to choose the tools yourself. You should not buy too cheap or expensive tools if you are not sure why such a high price. The hacksaw should have an easy move in any direction in order to cut the metal not only in the standard way, but also in other movements. The size of the frame must be suitable for a standard blade or for universal blades, which means that elements of different sizes can be attached to the saw. The hacksaw frame can be the most common, made of durable materials, this creates a long service life. And also it can have a different angle of inclination of the blade, so that it is convenient to work with various difficult areas. You also need to pay attention to the handle, it should be comfortable so that the hand does not slip during work. Such elements are equipped with special finger rests. Also, the handle should not be hollow, so that during work it does not break quickly. When the saw is taken in hand, it should not wobble or diverge. Such a tool must be strong, the tight location of the canvas depends on it. The most convenient mechanism for tensioning the canvas is a lever, unlike a lamb, it is able to quickly do its job. If the canvas is too tight, then it is not possible to turn the lamb by hand, so you will need tools at hand.

READ  How to Use a Manual Tile Cutter

Which tooth to choose

The cutting plane for metal is performed with a different tooth size and with a different pitch.

The parameters are interrelated: the more gaps, the fewer teeth, and the fewer teeth, the larger they are in size.

The defining parameter is the number of teeth per linear inch (25 mm).

Available with 18, 24, 32 teeth.

The more teeth, the smaller they are, the harder the metal can cut the blade.

For processing materials of different hardness, it is recommended to use files with a certain number of teeth.

blade, hacksaw, metal

Hardened teeth are much stronger, more durable, cut harder materials.

However, over time, they also lose their sharpness.

Regular teeth are sharpened with a special saw file, this does not apply to metal blades.

Hacksaw blade for metal

The main feature of a blade for sawing metals is very small teeth, since it is impossible to work with large metal.

In any model, household or professional, the teeth are made of hardened metal, as they must exceed the hardness of the metal alloy for which the tool is used.

Sizes of the canvas vary from 150 mm to 300 mm.

Hacksaw blades for metal are distinguished primarily by the material of manufacture:

Permissible for the cutting part of the saw is a hardness of 45 units.

This option is one of the most short-lived, so it is installed only on household models.

Professionals recommend choosing harder grades. 55-60 HRC.;

Flexible but extremely durable.

This combination provides both cutting speed and the ability to work with hard alloys;

Especially effective in cases where it is required to cut steel at a certain angle;

The electron-beam method is used for welding, since metal is required to be heated in a narrow area.

DeWALT DWHT20547 5 in1 Multifunction Hacksaw

The file is very flexible, it can literally be rolled into a knot.

Another classification is related to the distribution of the file.

To avoid jamming the tool, the cut should be slightly wider than the blade itself.

This is achieved by performing wiring. along the canvas or along the teeth:

wiring along the canvas involves bending the edge of the file together with the teeth to the right and left alternately.

Bend height 2–3 mm, deviation value. 0.25–0.6 mm.

Layout on the canvas is implemented on products with small teeth;

set on the teeth. only the teeth are bent in different directions.

Alternation is determined by the step size.

With a small step, 2-3 teeth are immediately retracted, with an average one. 1 tooth is retracted to the left, 2. to the right, and 3 remains in place.

With a large pitch, the teeth are retracted alternately.

The canvases are also distinguished by the nature of the placement of the teeth:

The teeth of different sizes are selected so that the tool can work with materials of different hardness and density.

Combines both metal cutting options. for soft and hard alloys, for example, and teeth for sawing metal and wood.

Checking the string at work

Diamond thread is tested not only at release, where consumer tests are more valuable.

Saws the string very quickly, there is no need to make much effort.

Moisten the thread and material before sawing, and repeat the wetting while sawing.

The consumer testing results are as follows:

How to change hacksaw blades

The test was carried out on a 0.7 mm diameter drill made of high speed steel.

READ  Wall Charger Screwdriver

The thread makes a cut with a depth of 1 mm in 1 minute.

Hacksaw blade: types and selection

Hacksaw blade: classification, features of use.

Sawing different materials requires blades of different structures: with large and small teeth, made of carbon steel or hardened steel, set only along the teeth or along the entire length of the blade.

With the help of a hacksaw, metal and wooden blanks, plastic and drywall are sawn, and different materials are used for working with different materials.

So, a blade for wood, used for sawing boards, chipboard, logs, is very wide, and its teeth are large.

The blade for metal is much narrower, with small teeth, it is used in an appropriate hacksaw.

In a hacksaw for metal, the degree of tension of the file is adjusted, which is adjusted to work with both soft and hard alloys, as well as with non-metallic materials, for example, plastic, etc.

The cutting element of a hacksaw for stone, more precisely, for concrete, is similar to a saw for wood, but with much larger teeth.

Carbide metal is soldered on separate teeth in order to saw, in addition to dense concrete, also foam concrete.

Canvas dimensions, length, width

The dimensions of the file are determined by the fastening method.

For such products, canvases are produced in only 2 sizes: 300 and 150 mm.

The first option is considered standard, products of this size are made of all possible types and from all acceptable materials.

Saw blade with a length of 150 mm is made from carbon steel only.

Thickness depends on the purpose of the tool.

On professional models, the size varies from 0.63 to 1.25 mm.

Blades for electric saws have a large thickness. up to 2.5 mm.

The file height reaches 13 mm. They are made only of bimetallic alloy, since all other options are too fragile.

Made from bimetallic alloy only.

Fine-toothed products are suitable for sawing hard metals.

The large version is intended for processing soft.

Since when sawing soft metals with fine teeth, the saw is quickly clogged with shavings, and the cut is sloppy, ragged.

To choose the right tool, take into account the following parameters:

Compact products with a length of 150 mm are suitable for sawing a small amount of materials, since the hand gets tired quite quickly when working with such a jigsaw.

Standard saws with a length of 300 mm do more work;

pitch. for sawing soft alloys, plastics, asbestos, large teeth with a pitch of 18 are suitable.

Saw hard materials with fine-toothed hacksaws;

material. the most durable and reliable today is a cloth made of different metals, the so-called bimetallic.

But if the blade is rarely required, then the home craftsman can get by with the carbon steel model;

Diamond string

There is also a more non-standard option for cutting metals. a string.

The latter is made of alloy steel, then diamond sputtering is applied to it with a thickness of 2 mm.

Loops are made at the ends of the strings so that the device can be fixed in a regular hacksaw.

A diamond string cuts literally any material: ceramics, stone, concrete and metal, and hard alloys.

At the same time, the thread is very cheap compared to professional hacksaws for metal.

Tungsten filament

This is the same string, but made of steel and coated with tungsten carbide.

They produce both canvases from such material and strings.

The latter are more profitable because they are much cheaper.

The tungsten string reaches 300 mm in length and can be easily attached to a regular hacksaw.

Cuts made with thread are very accurate.

With a string, you can cut mowing line curves and circles, not just straight cuts.