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A ratchet is a mechanical device that Ratchets Wheel allows continuous linear or rotary movement in mere one direction while stopping motion in the contrary direction. Ratchets are widely used in machinery and equipment. A rachet consists of a round equipment or a linear rack with teeth, and a pivoting, spring-loaded finger called a pawl (or click, in clocks and watches[1][2]) that engages one’s teeth. The teeth are uniform but asymmetrical, with each tooth having a moderate slope using one edge and a much steeper slope on the other edge.

When one’s teeth are relocating the unrestricted (i.e. forward) path, the pawl easily slides up and over the softly sloped edges of one’s teeth, with a springtime forcing it (often with an audible ‘click’) into the depression between the teeth as it passes the suggestion of every tooth. When one’s teeth move in the opposite (backward) direction, however, the pawl will catch against the steeply sloped edge of the 1st tooth it encounters, therefore locking it against the tooth and stopping any further motion in that direction.


Angle of teeth 60°

Material S45C

Heat therapy Induction hardened teeth

Tooth hardness 50 ~ 60HRC