Saw blade selection: The pitch of the teeth is determined by the number of teeth per length of 25.4 mm (1 inch). According to this spacing, we speak of coarse, medium and fine saw blades. In general: soft materials and large diameters are cut with coarse saw blades, hard materials and small solid and hollow sections are cut with fine saw blades. Coarse saw blades (14-16 teeth): Use for soft materials, eg aluminum, light metal alloys, plastics, molded materials and also for larger cutting lengths and diameters. Medium saw blades (18-24 teeth): Use for medium-hard materials, eg steel, copper, brass and for profiles with thinner wall thicknesses and shorter cutting lengths. Fine saw blades (28-32 teeth): Use for very hard materials, eg for cutting tool steels and for thin wires, sheets, thin-walled tubes and profiles. Proper metal cutting: Cutting is done in the forward direction, so the teeth should also point forward. The workpiece should be clamped firmly in the vice and as close to the vice jaws as possible. Workpieces that spring after clamping are difficult to cut and cause an inaccurate cut. When cutting the leading or trailing edge of the workpiece, the saw blade should be inclined at a small angle. Steel and other hard materials or thin-walled workpieces are good to cut at a slower cutting speed (about 30 cuts per minute). Cutting too fast causes the teeth to become dull earlier, soft materials can be cut faster. Flat workpieces should be clamped and cut flat for better guidance of the saw blade. If the workpiece is clamped vertically, the saw teeth may break and there is a risk of inaccurate cutting. If the height of the saw frame is not enough when cutting, it is good to turn the saw blade by 90o. The sheets need to be clamped between two angle profiles and cut along their edge with a saw blade with a fine spacing of 28-32 teeth at 25.4 mm. It is not good to cut thin-walled pipes transversely in one direction, because the teeth can get caught behind the wall of the pipe and can break quickly. It is advisable to cut the pipes only to the inner wall, then turn them and cut them in the same joint. Repeat until the whole pipe is cut. Thick-walled pipes can be cut with a saw blade with a fine spacing of 28-32 teeth to 25.4 mm without turning. Before cutting, it is good to slow down and reduce the pressure on the saw blade, thus avoiding the imminent breakage of teeth and the risk of injury.