A ratchet is a mechanical device that Ratchets Wheel allows continuous linear or rotary movement in only one direction while avoiding motion in the contrary direction. Ratchets are widely used in machinery and equipment. A rachet contains a round equipment or a linear rack with tooth, and a pivoting, spring-loaded finger known as a pawl (or click, in clocks and watches[1][2]) that engages the teeth. The teeth are uniform but asymmetrical, with each tooth having a moderate slope using one advantage and a much steeper slope on the other edge.
When one’s teeth 
are relocating the unrestricted (i.electronic. forward) direction, the pawl very easily slides up and over the carefully sloped edges of the teeth, with a springtime forcing it (often with an audible ‘click’) in to the depression between your teeth since it passes the suggestion of every tooth. When one’s teeth move in the contrary (backward) direction, however, the pawl will catch against the steeply sloped advantage of the initial tooth it encounters, therefore locking it against the tooth and preventing any further motion for the reason that direction.
Specifications
Angle of teeth 60°
Material S45C
Heat treatment Induction hardened teeth
Tooth hardness 50 ～ 60HRC
