A ratchet is a mechanical device that allows continuous linear or rotary movement in only one 
direction while stopping motion in the contrary direction. Ratchets are widely used in machinery and tools. A rachet includes a round gear or a linear rack with teeth, 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 on one advantage and a much steeper slope on the additional edge.
When the teeth are moving in the unrestricted (i.electronic. forward) path, the pawl quickly slides up and over the carefully sloped edges of the teeth, with a springtime Ratchets Wheel forcing it (frequently with an audible ‘click’) in to the depression between your teeth as it passes the tip of every tooth. When one’s teeth move in the opposite (backward) direction, nevertheless, the pawl will capture against the steeply sloped edge of the initial tooth it encounters, therefore locking it against the tooth and stopping any further motion for the reason that direction.
Specifications
Angle of teeth 60°
Material S45C
Heat therapy Induction hardened teeth
Tooth hardness 50 ～ 60HRC