1, hand saw structure:
A hand saw consists of a saw bow and a saw blade. Saw bow is used to install saw blade, it has adjustable and fixed two kinds. Fixed saw bow can only install a saw blade of one length, adjustable saw bow can install several lengths of saw blade through adjustment, and the shape of the handle of the adjustable saw bow is easy to force. So now it is widely used.
Saw bow is used to install saw blade, it has adjustable and fixed two kinds. Fixed saw bow can only install a saw blade of one length, adjustable saw bow can install several lengths of saw blade through adjustment, and the shape of the handle of the adjustable saw bow is easy to force. So now it is widely used.

2, the correct selection of saw blade:

The saw blade has fine teeth (1.1mm), middle teeth (1.4mm) and thick teeth (1.8mm) according to the size of the tooth pitch of the serrated teeth. When using, it should be selected according to the hardness and thickness of the sawing material. Saw cutting soft materials (such as red copper, bronze, etc.) and thicker materials should choose coarse tooth saw blade; Fine tooth saw blade should be used when cutting hard or thin materials (such as tool steel, alloy steel, etc.). Generally speaking, for sawing thin materials, at least three gears on the sawing section should be able to participate in sawing at the same time, so as to avoid the sawtooth hook and crack.

1. The saw blade should be installed with appropriate tightness. When sawing, do not exert too much force suddenly to prevent the blade from breaking and wounding the saw bow.

2, the workpiece will be sawed off, the pressure should be small, to avoid the pressure ambassador workpiece suddenly disconnected, hand forward caused by the accident, the general workpiece will be sawed off, to use the left hand to hold the workpiece disconnected part, to avoid falling and injured legs.