A hacksaw is a common tool for fitters, which can cut smaller round steel, angle steel, flat steel, and workpieces. The hacksaw includes a saw frame (commonly known as a saw bow) and a saw blade. When using the saw blade, install the saw blade on the saw frame. Generally, install the saw blade with the tooth tip facing forward. Installation in the right direction can relieve adze teeth and prolong the service life of the saw blade. After the hacksaw is used, the saw blade should be removed or the tension nut should be loosened. This can prevent the saw frame from deforming, thereby prolonging the service life of the saw frame. Saw blades are divided into two types: single-sided teeth and double-sided teeth, and are divided into coarse teeth (14 teeth/25mm), middle teeth (18~24 teeth/25mm) and fine teeth (32 teeth/25mm) to suit different materials. Sawing. In order to improve work efficiency and avoid adze teeth, fine-tooth saw blades should be used when cutting harder materials, coarse-tooth saw blades should be used when cutting soft materials, and medium-tooth saw blades should be used for general materials. The thickness of the saw blade is 0.5~0.65mm, the width is 10~12mm, and the length is 200mm, 250mm, and 300mm. There are two types of saw frame with fixed length and adjustable length. The adjustable-length saw frame has three gears, which are suitable for saw blades of three lengths. At present, due to the limited specifications of saw blades purchased by the factory, the two shorter gears are basically not used, but the movable part is swallowed in when idle.
