Tool manufacturers
When performing operations in a manufacturing environment, choose imported brands. But before you buy blades for band saws, make sure the authenticity of the product. Ask the seller for certificates of conformity, be sure to check the marking on the tool. The most popular in the market are products of several brands.
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Arntz (Germany). The company has been producing elements for band sawing machines for over 200 years. Specializes in carbide blades.
Photo # 2: Arntz Band Saws
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Lenox (USA). Additional protective coatings Armor based on aluminum and titanium nitride are applied to all canvases.
Photo # 3: Lenox band saws
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Wikus (Germany). A wide model range of the company allows you to choose tools for performing any operations.
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Forezienne (France). The company produces blades from steel, which includes beneficiated ore. The complex process of quenching and tempering ensures optimal strength characteristics of the products.
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Lennartz (Germany). Cutting edges and backings are made of hardened steel. Serrated edges are welded.
general information
The tool is made in the form of a device equipped with a cutting disc, which is used for cutting various types of materials - PVC, ceramics, wood, metal, etc. Its use is especially important when pouring a foundation, cutting a reinforcing bar, producing paving slabs, adjusting clinker bricks. This equipment is intended for the professional as it is usually not necessary for the DIYer to cut materials in large volumes. In addition, the user must have the skills to work with the tool, otherwise, if used incorrectly, an inexperienced craftsman can get injured.
Appointment
Cut-off type edging saws for metal are used mainly in construction, when it is necessary to cut bundles of rebar or stacks of wood. After all, here you have to deal with the diameter of the cutting wheel, which is much larger than that of a household tool. To meet the needs of DIYers, manufacturers produce special compact models that provide a variety of protection systems and limiters for safe operation.
Among such key elements, the frame should be distinguished, thanks to which the smooth movement of the disk is maintained, as well as a closed case that reliably protects the master not only from the blades, but also from the debris generated during operation.
Device and advantages
In the design of each machine for cutting metal, one can distinguish such essential elements as a solid base and a saw head with a working tool. Depending on the orientation and direction of movement of the working tool, the whole variety of cutting equipment can be represented in the form of two main groups: vertical and horizontal. There are commercially available models with which you can cut materials at an angle.
For large industrial enterprises, manufacturers offer automated cut-off saws, the cost of which is quite high. However, there is another solution - to purchase more compact models, equipped with manual and semi-automatic controls, which will be able to meet the needs of any enterprise.
This equipment has a number of advantages:
- high reliability;
- durability (the service life promised by the manufacturer is 10 to 20 years);
- security;
- high processing speed;
- smooth cut without chipping and burrs.
Features of the use of a band saw
Saw band drawing
- toothless. For cutting, frictional force is applied, due to the design of the tool, on which there are no powerful teeth;
- toothed. The cutting belt is equipped with sharp teeth at a certain angle;
- electrospark. Electric discharges are used to process metal workpieces.
Toothed saws are considered the most popular of these varieties. They can be made from high-strength steel or bimetallic materials. In the first case, the device is suitable for processing common metals, and in the second - with increased hardness.
A design feature of the belt unit is the presence of a blade that is well tensioned on the drive pulleys. The latter elements are constantly rotating, which ensures the required working speed. Other advantages of the tool include minimal waste after processing metal products. The cutting blade makes a cut that can only be a few millimeters thick.
Sharpening and setting band saws
What steel are circular saws made of?
It is not enough to purchase a reliable circular saw. Without good equipment, she will not be able to cope with the tasks. Only the installation of high-quality saw blades will allow you to achieve high productivity when working in wood.
You can find out more about the tool in our article - 5 important characteristics of electric circular saws for wood.
What are the saws: the main types and characteristics of the tool
Take the saws away from humanity and progress will stop. This statement is not a joke. Without a tool capable of cutting wood and metal, concrete and stone, the functioning of industrial enterprises and other areas of commercial production is impossible.
The household also cannot do without saws. Every man has at least one hacksaw, and a good master has a whole arsenal of "toothy helpers".
We will take a look at the most common types of saws to get an idea of their working capabilities and application.
It all started with a simple hacksaw
It is this saw that is the ancestor of the family of hand tools designed for woodworking. As soon as the first iron ingot was smelted, a man had the idea of forging a tool from it. for land cultivation.
It can be assumed that the ax became the second after the hoe. The third was probably a saw with a handle, known to us today as a hacksaw. Over the centuries that have passed since its invention, she has acquired numerous "brothers and sisters", performing dozens of different jobs.
The accepted classification divides this type of hand saws into two groups:
- Hacksaws for wood;
- Hacksaws for metal.
Depending on the direction of cutting, hand saws for wood are divided into three categories:
- For rip sawing cutting;
- For cross cutting;
- Universal (longitudinal-transverse).
The difference between them lies in the shape of the cutting teeth: they are inclined forward on the rip saw, and straight on the cross-cut saw.
The universal hacksaw tooth is also tilted forward, but has a special sharpening. It allows you to cut along and across the grain.
By design, hand saws are divided into several types:
- Classic hacksaws (transverse or longitudinal cutting);
- Circular saws (for cutting holes);
- Spike saws (for cutting connecting spikes).
When choosing a hand hacksaw, not only the shape, but the size of the teeth plays an important role.
There are three types of incisors:
- Fine tooth - 2.0-2.5 mm (for high-precision sawing and cutting of small items);
- Medium tooth - 3.0-3.5 mm (for medium-sized parts);
- Coarse tooth - 4.0-6.0 mm (for coarse cutting of cant and logs).
The international classification divides hacksaws not by the height of the teeth, but by their number per 1 inch of the cutting blade.This standard has taken root in our country, so do not be surprised if you see the letters PPI or TPI on the instrument label. The number behind them is the number of teeth per inch of length. The larger it is, the smaller the tooth (eg PPI 8 or TPI 14).
Today on the market you can see a modernized type of hacksaws. They can be easily distinguished by the gaps cut in the canvas. As a result, the teeth are arranged in groups of 6-7 pieces.
This tool is designed for cutting raw wood. The gaps between the teeth are needed so that wet chips do not clog the cut and are easily removed during work.
In addition to the usual hand hacksaws, users are now offered an electrified version of the tool. The powerful electric chopper can easily handle a large amount of sawn timber cutting without too fatiguing the owner.
Peculiarities
The device is a design based on a special rotating disc. The device can be used to saw wood, steel, ceramic and other surfaces. Also, very often installers use it during concrete work with a foundation, for cutting a reinforcing bar, in the manufacture of porcelain stoneware or when working with solid bricks. Such a tool is popular only at construction sites or in production, since at home there is no need to cut large-sized materials in large quantities. The device should be used very carefully, and before starting work, it must be correctly configured, otherwise even an experienced operator may get injured.
Cutting machines are used for industrial purposes, when it is necessary to quickly and efficiently cut reinforcing rods or boards. The professional tool has a large cutter diameter capable of cutting a wide variety of objects.
Manufacturing companies also present on the market small-sized versions of the device, created specifically for domestic use. Several stages of protection are provided here for the safety of the operator. The main component of the device is the fixed base of the machine - this ensures a perfect thread. The frame has a closed body - this guarantees the protection of the worker's hands from cutters and waste flying in all directions.
It is also worth noting such important elements of the machine as the robust body and the cutting disc. These designs can be divided into subgroups depending on the purpose and direction of rotation of the cutter:
- vertical appliances;
- horizontal;
- devices capable of cutting at different angles.
In large companies, electric automated machines are used in production, which are distinguished by a high price. There are other options - these are small-sized devices that require the constant presence of an operator. Such models are most common in enterprises. The main design feature is high quality as well as durability. The manufacturers claim that such a device, with constant loads and careful use, will last about 15 years. The unit is capable of processing any surface at high speeds without creating defects or damage.
Which hacksaw to choose
If a hacksaw is bought for carpentry work, products with large teeth will do.
In order for the purchase of such an instrument to bring only positive emotions, you should know the rules by which you need to choose it:
Determine how often the hand saw will be used. A hacksaw with hardened teeth is good for regular sawing jobs. Having bought such a "helper", you don't have to worry about divorcing and sharpening your teeth. Models with unhardened cutting edges can be used less frequently. with constant sawing, they will quickly deteriorate.
Price. High-quality models from popular companies are sold at a higher price. But well-known brands give a long-term guarantee for their products.If the tool is purchased for one-time work, you can buy a simpler hacksaw.
The uniformity of the web is an important parameter. To do this, in the store, when inspecting the tool, gently bend it and release it. If even small changes appear at the bending point, then the metal is of poor quality and will quickly deteriorate. The length of the blade affects the applicability of the hand saw. How the tool will be used depends on this value. The longer the canvas, the greater its springiness. Therefore, these hacksaws are not suitable for processing oak, maple, ash or other hard types of wood.
If a hacksaw is purchased for carpentry work, large-toothed products will do. Fine-toothed blade is useful for carpentry
It is very important that centimeter and millimeter divisions are applied on the canvas. Such a scale will help you stay in touch with your workflow in search of a ruler.
Sometimes manufacturers supplement it with a rubberized finger pad. Such a detail will prevent calluses from appearing on the hands.
Hacksaw material
Wood hacksaws do not dull for a very long time and give an even cut
Most often saw blades are made of steel. It can be cold rolled, alloyed or instrumental. The latter is the most popular. Some hand tools are coated with a thin layer of Teflon. This material removes friction during sawing and protects the metal from rust.
The quality of the teeth is also important. Hardened cutting edge is better for raw wood
The hardness of the teeth of such hand saws is 7-8 times more than usual.
Therefore, these hacksaws for wood do not dull for a very long time and give an even cut. Such models cannot be re-sharpened, which is very inconvenient. This means that after the service life has passed, the tool will have to be thrown away.
To know, what's in the store in front of you hacksaw with hardened cutting edge is easy. Her canvas is black. It is the best saw for cutting any kind of wood.
Shape and size of teeth
Experts recommend buying models with teeth from 6 to 8 mm
Cutting speed and accuracy when cutting will depend on the saw teeth. The smaller such details, the cleaner the work will be. But using this tool will take more time. A hacksaw with large teeth will allow you to cut faster.
Experts recommend buying models with teeth from 6 to 8 mm. There will be much more sawdust when using it. When working with laminate, chipboard, MDF, etc. choose saws with teeth no larger than 3 mm. A hacksaw tooth can be:
- Chisel. Used for longitudinal cuts. It looks like a triangle with different sides. Sharpening in it goes across the canvas.
- Dagger. Works in any direction of the hacksaw. The tooth is easily recognizable by its appearance. It looks like a triangle with equal sides.
- Universal. These include 3D sharpened triangular teeth. They cut easily in different directions.
For cutting trim elements and thin materials, a saw with a pitch of 9 to 15 mm is suitable. Medium-sized pieces are sawn with a 7- or 9-flute tool.
Which one to choose?
Choosing the best saw for home or professional use is difficult without the necessary knowledge. This process should be approached with all responsibility, otherwise you can purchase a product with limited functionality and capabilities.
Among the main characteristics that you should pay attention to when choosing the optimal metal cut-off saw are the following
Cutting depth. If the machine will be used exclusively at home, then you can limit yourself to a depth of 70 mm. As for professional models, this indicator can reach a couple of hundred millimeters.
First of all, you need to take into account the type of material used and then select the optimal machine in terms of depth.
The presence of control automation. Of course, if the saw was originally designed to handle plastic or PVC pipes, then it will not cope with metal materials.
Machine tools are considered ideal, which can boast of the presence of an electronic control system. Their main task is to prevent a decrease in the rotational speed and at the same time to ensure the highest possible processing quality.
Smooth start. Not all devices are equipped with such a function, however, its presence allows you to guarantee equipment protection from power surges and other problems that can lead to saw damage. In addition, the soft start makes it possible to protect household appliances from overvoltage.
Reboot control system. If a similar element exists in the metal cut-off saw, then the equipment will not overheat. In case of problems, it will immediately restart, which is a reliable protection of the power plant from combustion.
The type of cutting blade is an extremely important indicator on which the reliability and durability of the cut-off saw depends.
When choosing a cut-off saw, attention needs to be focused on technical characteristics.
The weight of the device is important. There are light models on the market, the weight of which does not exceed 20 kg, as well as saws over 50 kg
The latest options boast a belt drive to protect the power plant from overload
There are light models on the market, the weight of which does not exceed 20 kg, as well as saws over 50 kg. The latter options boast a belt drive to protect the power plant from overload.
During the purchase process, it is better to make sure that the purchased model will be equipped with a soft start function in order to ensure the minimum load on the electrical network. If you plan to use the saw frequently, you may need to replace the carbon brushes, so it is best to choose saws that can be replaced manually. This will greatly simplify the maintenance process and save time.
The last thing you should pay attention to is the equipment of the saw. For example, if you often need to cut at an angle, then it will not hurt to have a special vice.