Carpentry nowadays is hard to imagine without electrical tools. Circular saws, cordless jigsaws and machine cutters allow you to create high-quality cutting at a high working pace. Nevertheless, hand tools remain relevant, due to their ease of use and complete energy independence. A special place in this segment is occupied by a back saw - at first glance, a kind of hacksaw with an unusual device, but in practice, significant operational differences can be noted.
Features of the tool device
The design of the saw is formed by the same basic components - a cutting metal blade and a handle. A fundamental feature of the device can be called the presence of the very butt. This is an overhead detail on the top of the canvas, which acts as a stiffener. What is this supplement for? A traditional hacksaw during sawing gives small blade vibrations, which slow down the work and can affect the quality of the result. In order to minimize “hanging out”, manufacturers increase the rigidity of the canvas by increasing its thickness. The negative effect of such a change in parameters will be the expansion andcutting area, which is unacceptable in the delicate processing of small structures and parts. In turn, the back saw, precisely due to an additional device with increased rigidity, eliminates the effect of oscillation, while maintaining a moderate thickness of the blade. This tool is also distinguished by a small hardened tooth, which allows you to perform accurate and accurate cuts.
What kind of work is a backed saw intended for?
This version of the hacksaw is difficult to attribute to ordinary household models. Nevertheless, this is a specialized tool that is used in the furniture industry and in the creation of decorative wooden products. In the household, such a saw can make connecting grooves during the installation of wooden structures. Moreover, it must be borne in mind that the blade, precisely because of the stiffener, imposes restrictions on the depth of cut. In this sense, the surface removal of solid wood or the formation of small holes can be considered as the target operations of the backsaw. Why do you need such a tool in construction? When installing door and window frames, this hacksaw will allow you to make complex connecting edges, spending a minimum of time. Similarly, when laying wooden floor coverings, complex sampling at the points of communication passage may be required - it is precisely a thin canvas with a fine tooth that can easily cope with such tasks.
Back saw specifications
In the manufacture of blades, high-strength steel is usually usedcorrosion resistant alloy. The handle is made of a wooden base or rubberized plastic. From the point of view of cutting possibilities, the following characteristics are significant:
- The length of the cutting area is from 250 to 350 mm.
- The width of the canvas is on average from 70 to 100 mm.
- Tooth pitch - from 3 to 4 mm.
- The thickness of the web is 0.8 mm.
An important parameter is the angle of location on the base of the handle. If ordinary wood saws have a direct continuation of the blade, then the shape of the back models allows you to make slopes of 45-90 degrees. This is also a way to improve the ergonomics of the tool when making non-standard cuts. There are versions with constant angular fixation at a certain degree, and there are functional modifications with the ability to adjust over a given range.
Wood saw and miter box combination
Every carpenter knows how important it is to properly fix the work base in the process of cutting. In the case of a hand tool, the importance of fastening becomes completely decisive, regardless of the characteristics and type of hacksaw. For butt models, a fixture in the form of a miter box is optimal. This is an auxiliary device designed to create accurate cuts - including corner cuts. The design of the device resembles a box with slots and a ditch. The web will pass through the elongated holes during operation, and the central part will serve to place the workpiece. You should choose a back saw for a miter box according to the possibilities of cutting with different angles - 45, 60 and 90 degrees. But this value is notis fundamental, since most designs have a universal purpose. The material of manufacture and the parameters of the miter box are more significant in terms of compatibility with the material being processed.
Tool manufacturers
The segment is highly specialized and little in demand among a wide audience, so not every manufacturer addresses it. The best developments are offered by KRAFTOOL, IRWIN and Bahco. So, in the family of the first company, the Multi-M hacksaw is 320 mm long with a rounded top. This version is suitable for rigid sheets made, in particular, from combinations of wood and plastics. IRWIN sells the Xpert XP3055 hacksaw, 300 mm long. The small design with a two-component handle is ergonomic, reliable and safe. As for the Bahco company, the Superior back saw with original NXT teeth, which are subjected to high-precision hardening, stands out in its assortment. This model is suitable for medium and small workpieces of different hardness. A thicker butt increases the durability of thin blades and increases the quality of the cut.
In closing
Custom tool designs quite logically increase the cost. If an ordinary household hacksaw costs an average of 300-500 rubles, then back modifications from the above manufacturers are available for 1500-2000 rubles. Accordingly, the question arises of how much carpentry hand tools for special purposes are needed.ordinary home master? Of course, there is no question of regular use. But for those who, in principle, deal with wooden structures, the presence of such a saw in the household will not be superfluous. Another thing is that its function with the same quality can also be performed by electric jigsaws and specialized narrow hacksaws. The difference will be only in the details of the technological organization of the workflow.
