Hacksaw is a common tool for fitters, which can cut off small-sized round steel, angle steel, flat steel and workpieces. Hacksaw includes saw frame (commonly known as saw bow) and saw blade. When using, the saw blade is installed on the saw frame. Generally, the saw blade is installed forward with the tooth tip. However, if it is found that it is easier to use the saw blade, the tooth tip is installed in its own direction, which can relieve the tooth and prolong the service life of the saw blade. Hacksaw after use, remove the saw blade or loosen the tension nut, which can prevent the saw frame from deformation and prolong the service life of the saw frame. Saw Blades have two types of unilateral teeth and bilateral teeth, and are divided into coarse texture (14 teeth/25mm), medium tooth (18~24 teeth/25mm) and fine teeth (32 teeth/25mm), to be suitable for sawing of different materials. In order to improve work efficiency and avoid tooth cutting, fine tooth saw blade is selected when sawing harder materials, coarse texture saw blade is selected when sawing softer materials, and medium tooth saw blade is selected when sawing common materials. Saw blade thickness 0.5~0.65mm, width 10~12mm, length 200mm, 250mm, 300mm three specifications,. Saw frame has two kinds of fixed length and adjustable length, and saw frame with adjustable length has three gears, which are applicable to saw blades of three lengths respectively. At present, the factory is limited by the specifications of imported saw blades, The two short gears are basically not used, but only swallowed the activity part when idle.
