[Types of files] Notes on selection and use of saws

Large saws are commonly used for thick and thin planks; small saws are commonly used for narrow and thin wood; coarse saws are commonly used for cross-cutting; fine saws are used for tenon and shoulder; hardwood and wet wood should use large saws, soft wood and dry wood should use small saws. Saw.

When using, we must pay attention to the safe operation methods of all kinds of saws:

1. Before using the frame saw, use the knob to adjust the angle of the saw blade. It is customary to make a 45 ° angle to the plane of the wooden frame. Use the hinge to tighten the tension rope to make the saw blade straight and tight. When opening the saw, right hand Hold the saw handle firmly, press the left hand at the beginning, and gently push and pull a few times. Do not use too much force; do not twist left and right when sawing, heavy when sending the saw, light when lifting the saw, and the rhythm of pushing and pulling should be even; when the fast cutting is finished, the sawed part should be stabilized by hand. After use, loosen the saw blade and hang it in a firm position.

2. When using a cross-cut saw, the force of the two hands should be balanced to prevent the saw from running toward the side with the strong force; when correcting the deviation, the deviation should be corrected slowly to prevent the saw blade from breaking or breaking.

3. When using a wire saw, do not use too much force, and do not pull the saw too fast, so as not to stretch the wire. When pulling the saw, the operator's head is not allowed to be on the upper end of the bow frame, so as not to hurt the face when the wire is broken.

4. The sharpness of the saw blade and the firmness of the saw frame and saw handle should be checked at any time; the saw blade with dull teeth and uneven slope should be repaired in time, and the damage to the rope, nut, knob, handle and wooden frame should also be timely Do not continue to use it until it has been trimmed and restored.

The most common saws in workshops are planer saws, jig saws and hand saws.

Jig saws are used to cut curves and can also be used to cut out a shape inside the board. When making a dovetail, you can use a bow saw to remove the waste between the dovetail joints and the dovetail head.

Although most of the work that can be done with a hand saw can now be done with a machine, cutting a board with a hand saw feels more enjoyable, especially during the process of cutting the board to an approximate size in the early stages of processing. The zigzag tooth shape of the hand saw will be specially made into a shape suitable for cross-cutting or straight-cutting. The more saw teeth per inch a saw blade contains, the smoother the cut surface it leaves, but the slower the cutting speed.

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