Among the masters there is a perception that 90% in any business works a tool, and not a master. A properly made hacksaw is pleasant to work with, significantly reduces the effort and time spent for cutting. The design of the hacksaw has many components that make it easy to use. Not the last place among the elements of preparation for work is occupied by the hacking teeth. In any hacksaw cutting parts must necessarily be divorced. The exception is a hacksaw with a cross section of the cutting blade in the form of a trapezoid, the base of which is in the arrangement of the teeth. Such a saw does not require a tooth spacing.
The saw, with a properly made tooth spacing, significantly reduces the effort and time spent for cutting.
The effect of tooth breakage on a hacksaw job
The more teeth are separated, the wider the sawn space. If the teeth are not wide enough, then in the process of operation the upper part of the blade will be heated as a result of friction against the edges of the cut. The saw from this expands, which can lead to seizure. To avoid this phenomenon, the hacksaw teeth are bred and constantly monitor the width of the divorce. The presence of divorced teeth creates a gap between the saw blade and the surface of the cut. The saw moves easily, without friction and, accordingly, without heating. In the absence of a gap, the hacksaw begins to involuntarily deviate from the desired direction of the cut.
Various tools and devices are used to perform this work: from pliers to devices using a dial gauge. This device can control the amount of deviation of the cutting element with an accuracy of 0.01 mm. An experienced master, of course, will ensure the quality of wiring and pliers, clamping the hacksaw between the knees. It even uses a conventional screwdriver with a sharply sharpened blade and wishbone to ensure proper force. The screwdriver is used for smaller teeth.Back to table of contents
Teeth Divorce Process
The methods of distributing saws.
In order to make a divorce on a hacksaw, it is better to use special tools for work. The essence of the divorce of the saw is to bend the teeth from the center of the blade to the sides. The simplest device for this purpose is the wiring. It is made of a piece of steel plate, across which are made slots. The width of the slot corresponds to the cross-section of the tooth, and the depth should be in the range from 1/3 to half the height of the tooth. You can make the wiring yourself, sawing the necessary recess in the steel plate with a hacksaw for metal. If the width of the blade hacksaw while not enough, then use a double blade.
For work on the establishment of the correct deviation of the cutting parts of the saw blade is clamped in a metalwork or carpentry vice. At the same time laying from plywood is used. It is necessary to install the saw blade so that only the teeth protrude above the edge of the jaws. Wiring with your kerf is put on the cutting part. The necessary deviation is made. The teeth are bent one at a time.
The total value of the deviation is equal to the size of the cut. The kerf, which is wider than the width of the blade, greatly facilitates the work of a sawyer. But too wide a kerf requires more wood to be converted into sawdust and more energy is consumed. It is established that the optimal width of the cut depends on the moisture content of the wood. With a dry board, a narrower cut is advantageous. With a wet board, the edge of the cut has an elastic recovery, so the teeth should be larger. It is more convenient to use different handsaws for working with wood of different humidity.
When dry wood requires a deviation of the cutting line from 1/4 to 1/2 mm of each side from the axis of the canvas. With wet wood, this size is 0.5 - 1.0 mm. It should be remembered that you can not bend the tooth at the base. This may cause damage.
When looking at the saw teeth along the cutting edge, the tops of the teeth should be aligned.
Such control will ensure sufficient quality of work. If the control shows the deviation of the tooth from the line, then additional editing is done.
In addition to the usual wiring, use special devices with adjustable deflection limiters. The levers of such devices have control devices in the form of a screw with a lock nut. There are elements with a scale on them indicating the size of the deviation. With such tools the same deviation of the teeth is ensured up to a certain stop.
For complete alignment, you can make several movements with the saw between the jaws of the bench clamp placed on the size of the required width of the wiring. For these purposes, a special template is used. When the cutting elements are in the same plane and on the same line, a clean and high-quality cut is obtained. Properly divorced and sharpened handsaw causes satisfaction and pride in the tool of any master. Those who often and often work with a hacksaw will immediately appreciate all the advantages of the tool.