The convenience of work with ordinary saw is defined by two characteristics which you can affect. It is divorce and sharpening of sawteeth. As a rule, saws are already on sale completely prepared for work, but in the course of work the tool wears out and is sometimes deformed.
1. Let's begin with distributing of teeths. Turn saw to yourself the return end opposite to arrangement of the handle, and bring on the level of eyes. At qualitatively prepared tool it is visible that teeths are slightly unbent through one aside. Width of this "path" for different material different. If the saw is used for damp wood, then width of this groove has to be 0.25-0.5 thickness of saw blade. For seasoned wood can make also 2 thickness of cloth. The divorce of teeths by special "razvodilka" - iron plate with cross cuts under teeths is adjusted.
2. Sharpening of sawteeth is also simple. Fix saw on something that it was convenient to you. Many of joiners use for this purpose bench back. Hacksaws can be sharpened small triangular file.
3. The universal hacksaw intended both for the longitudinal machine cut of wood, and for cross has teeths in form as isosceles triangles, and such teeths are sharpened on both sides of "triangle". The facet has to be located from the inside of tooth, depending on distributing. The file is located at an angle 60-70 degrees in relation to cloth.
4. The longitudinal hacksaws intended for the machine cut along tree fibers have the teeths a little "slanted" in the direction from the handle to sock and are sharpened only from one party opposite to the handle. The file at the same time is located at an angle 45 degrees. Saws with more difficult configuration of teeths are sharpened as universal, at an angle 60-70 degrees. Attentively look narrowly at how such saw has been ground and just correct sharpening.