A ratchet is a mechanical gadget which allows continuous linear or rotary motion in mere one direction while preventing motion in the contrary direction. Ratchets are trusted in machinery and tools. A rachet consists of a round gear or a linear rack with the teeth, and a pivoting, spring-loaded finger called a pawl (or click, in clocks and Ratchets Wheel watches) that engages the teeth. One’s 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 one’s teeth are relocating the unrestricted (i.electronic. forward) direction, the pawl very easily slides up and over the lightly sloped edges of one’s teeth, with a springtime forcing it (frequently with an audible ‘click’) into the depression between your teeth as it passes the tip of every tooth. When one’s teeth move in the contrary (backward) direction, however, the pawl will catch against the steeply sloped edge of the first tooth it encounters, thereby locking it against the tooth and preventing any further motion for the reason that direction.
Angle of teeth 60°
Heat treatment Induction hardened teeth
Tooth hardness 50 ～ 60HRC