The Addendum and dedendum circle introduced here are a reference circle that cannot be seen on a gear, as it is a virtual circle, determined by gear size. Calculation Examples The following …

Spur Gear design formula for geometry, pitch, tooth clearance and critical functional data. (Inch Units Applicable for Constants) Spur Gear Design Calculator. Where: φ = Pressure Angle a = …

Dedendum Circle: The circle that passes through the bottoms of the gear teeth. Pitch Circle: The imaginary circle that rolls without slipping with a pitch circle of another gear. Clearance Circle: …

Dec 29, 2023 · The addendum is the radial distance of a tooth from the pitch circle to the top of the tooth. 7. Dedendum. Dedendum is the circle drawn through the bottom of the teeth. It is …

The distance between the pitch radius and the root radius at the center of one gear tooth is called the dedendum (hf) of the gear. The distance between the root radius and the tip radius is …

Mar 27, 2025 · 1. Addendum: The height by which a tooth of a gear projects above the pitch circle. Formula: Addendum = 1/Diametral Pitch; 2. Dedendum: The depth of the tooth from the …

Feb 1, 2025 · Dedendum Circle : The dedendum circle is the innermost profile circle. The dedendum is the radial distance between the pitch and dedendum circles. Clearance : …

May 12, 2021 · The circle that passes from the bottom of the tooth is called the dedendum circle. It is also called the root circle which surrounds the bottom of teeth. The diameter of the …

Dedendum circle. It is the circle drawn through the bottom of the teeth. It is also called root circle. Note: Root circle diameter = Pitch circle diameter × cos φ, where φ is the pressure angle. …

Aug 25, 2019 · The dedendum is the radial distance of the tooth from the pitch circle to the bottom of the tooth. The circle drawn through the bottom of the tooth is called the dedendum circle. …