The hand-held circular saw, or, as it is usually called, the circular saw, is a versatile and valuable tool in the master's arsenal. It is indispensable for carpentry and carpentry work. The main task is to cut the sheet material, as well as transverse and longitudinal cutting of sawn timber. The design of a saw allows to receive the exact line of a cut.
Circular saw is used for cutting sheet material, as well as transverse and longitudinal cutting of wood.
For increase of accuracy and simplification of performance of work various devices and equipment are issued.
For all their merits, they have a fairly high cost, which is not everyone can afford. And sometimes they are difficult to buy and deliver to the right address, especially in areas remote from major cities. Therefore, a logical way out of this situation is to make the necessary device for the circular with your own hands.
Adaptations for the manual circular saw can be very diverse: from primitive disposable stops to very complex and versatile devices. And if for the manufacture of the simplest devices it is enough just to pick up even lengths of thick plywood or board of the required size, then a more complex tooling will already be made with the help of tools.
Materials and tools
Scheme homemade workbench (side view).
The material from which the devices for the circular saw are prepared can be picked up from thick pieces (not less than 10 mm) of plywood or hard wood (for example, birch) that are at hand.
From the tools you will need:
- joiner's square for measuring and marking workpieces;
- electric jigsaw or hand-held circular saw (for cutting blanks);
- drill (drilling mounting holes for fasteners);
- screwdriver or screwdriver with a set of bits to install fasteners.
The process of manufacturing devices for circular saw consists of several stages:
- a sketch is developed and detailing is thought out;
- material is selected;
- marking and cutting material;
- assembling and, if necessary, adjusting devices.
Guide for circular saw
Scheme homemade workbench (front view).
The simplest device is the guide bar. You can easily get an even straight cut. For the manufacture you will need a straight straight bar of the required length. He, with the help of screws (if it is permissible) or clamps, is attached to the material being processed. Fastening should be carried out at such a distance from the required cutting line so that the position of the saw blade coincides with the markings with the emphasis placed on the bar by the side sole of the circular saw. For a single cut, this method is suitable, however, if you repeat the same type of operations, the marking procedure and the installation of the bar will have to be repeated every time.
The guide bar can be improved by fastening it on a sheet of durable plywood with a thickness of 6-8 mm. One edge of the sheet when working will be combined with the cut line. At a distance equal to the distance between the saw blade and the edge of the sole of the circular saw (working distance), a guide bar is attached to the plywood with self-tapping screws. During the work, it will only be necessary to align the working edge of the plywood sheet with the cutting line and fix the opposite edge with clamps.Back to table of contents
Protection against digging: the nuances of the device
Scheme homemade workbench (top view).
To the simplest devices can also be attributed to the bar, fixed in place of the saw blade from the workpiece. This will avoid such an unpleasant effect as chips and breaks. And if these defects do not play a role on the cut boards, which will be used to make the frame of the house or formwork, then in the manufacture of carpentry work, the cut should be smooth and clean.
For the manufacture of more complex universal fixtures, tools and a certain amount of materials are already needed. The time spent on their production later will more than pay off with ease of work, accuracy and ultimately saving the same time.Back to table of contents
Assembly legs for the workbench.
- Blank template. If necessary, the manufacture of similar parts, you can use one of them as a template guide. To do this, cut the workpiece of the required length and at one end is fixed thrust rail. The width of the rail should coincide with the working distance. When working with this device, the thrust rail must fit snugly to the end of the workpiece. So you can get a large number of parts of exactly the same length without spending time on the marking of the cutting line.
- Cutting angle piece. For permanent use, you can make a cutting square. It consists of two massive wooden or plywood slats, fastened with self-tapping screws in the shape of the letter “T”. The length of the protruding ends of the crossbar of the letter “T” is aligned to match the working distance of the circular saw. Installing the aligned end of the crossbar in front of the marking line will provide an accurate perpendicular cut.
- Edge stop. The standard configuration of the circular saw includes an angular (edge) stop. It allows you to cut parallel to the edge of the material being processed. Using a self-made edge stop, a cleaner and more accurate cut can be achieved due to an extended and longer base.
For the manufacture of the edge stop, a thrust rail and a base for a circular saw are cut out of 15 mm thick plywood. At the base and thrust rail using manual milling cutter keyways are selected. The keys themselves are made of hardwood scraps or from the same plywood and fastened to the grooves of the thrust rail. To strengthen the stop at an angle of 90 ° to the stop rail, another rail of sufficient width is fixed, which will rest on the workpiece. Adjusting the distance of the cut from the edge of the workpiece is carried out by moving the stop rail along the guides, followed by fixing with the help of a locking screw.
Assembling the front of the workbench.
To install the screw in the base saw through the groove. To increase the cutting accuracy and increase the safety of work, it is recommended to use two screws. A hole is made in the base plate for the saw blade and a mounting system for the circular saw is installed. The design of the mounting system can be very diverse and will depend on the specific brand of saw. The common point for all options should be a reliable fixation of the circular and the possibility of its dismantling from the fixture after work is completed. For the convenience of setting the required width of the cut-off material, the measuring tape is fixed on the front surface of the base of the fixture.Back to table of contents
Tool for cutting boards
For cutting a large number of identical bars, it makes sense to make a device called a saddle. It consists of three parts connected in the form of the letter “P” (back and two sides). The width of the back should correspond to the width of the sawn timber. The width of the sidewalls is chosen so that they can provide sufficient support for the edge of the sole of the circular saw until the saw blade enters the workpiece material. Also in the sidewalls it is necessary to provide grooves or holes for secure attachment of the fixture on the treated timber using clamps.
Assembly scheme workbench.
Work with this device is as follows:
- marked cut line;
- at a distance equal to the working distance from the cutting line, the device is exposed and fixed;
- the cut of the beam is carried out by moving the circular along the side surface of the device.
The advantage of this device is the absence of the need to reconfigure when cutting a bar, which exceeds the thickness of the blade reach. For this, two passes of the saw are made from opposite sides.
The design of the device for working with bars can be slightly improved by analogy with the modernized guide bar. To do this, on one or both sides at a distance equal to the worker, bars are mounted that serve as a stop for the circular sole. Thus, the edge of the side part will coincide with the required cutting line.Back to table of contents
Cutting on the end or edge surfaces of the material is a separate and rather difficult task. To perform a cut on these surfaces, it is necessary to create additional surfaces for a stable support of the circular saw.
In this case, the device will be two wide slats connected to each other at an angle of 90 ° using self-tapping screws. The connection is further enhanced by the corners. The slats must have grooves for movement of the saw blade. To perform a cut, you need to make two such devices. The work process is as follows:
- devices are installed so that the marking line on the material coincides with the groove for movement of the saw blade;
- alignment of the material edge and the support surface of the devices is performed;
- clamps fixing devices for stable and safe operation are installed.
The hand-held circular saw can be turned into a cutting circular saw if there is a constructive opportunity. To do this, the saw is turned over and mounted on the table surface with the help of fastening systems so that the saw disk passes through the table top.
Fastening methods, material and dimensions of the tabletop, each master, who has undertaken such an upgrade, selects based on the tasks before him and the available possibilities. In general terms, all the nodes of such a device must meet the requirements of strength and reliability. The table top should be flat and level, have dimensions sufficient for safe processing of parts. A mandatory requirement is easy access to the switch. It is unacceptable to use a clamp for fixing clamps to the surface of the workbench or clamp in a metal bench vice instead of a frame saw.
Improper use of the circular saw is a source of increased traumatic risk. Moreover, injuries that can be obtained when working with this tool are sometimes very, very serious. Therefore, it is very important to securely fix both the materials being processed and the fixtures, excluding the slightest possibility of uncontrolled tool movement.
Properly selected adaptations for specific tasks, while adhering to safety precautions, will enable you to quickly and accurately perform virtually any task confronting a home craftsman.