What does Dedendum mean?

Definition of dedendum : the root of a gear tooth also : the distance between the dedendum circle and pitch circle of a gear wheel or rack — compare addendum.

How do you find addendum and Dedendum?

With the movement of teeth profile, now we have:

1. addendum ha=(1+x)*m.
2. dedendum hf=(1.25-x)*m.

What is addendum in a spur gear?

Engineering Information. Spur Gears. Gear Nomenclature. ADDENDUM (a) is the height by which a tooth projects beyond the pitch circle or pitch line. BASE DIAMETER (Db) is the diameter of the base cylinder from which the involute portion of a tooth profile is generated.

What is Dedendum formula?

Explanation: Dedendum is the radial distance from the pitch circle to the bottom of the tooth space. Dedendum is equal to Addendum plus Clearance = m + 0.157 m = 1.153 m as one addendum is a module and standard value of clearance is 0.157 m.

What is Dedendum in mechanical engineering?

Dedendum is basically the radial distance between pitch circle and bottom land.

Which is greater addendum or Dedendum?

2) Why dedendum is larger than addendum? Meshing of mating teeth should occur on the involute portion of teeth. The teeth have involute profile from the base circles to addendum circles. It is always tangent to base circles of mating gears and normal to the contacting surfaces of teeth.

Why is Dedendum value more than addendum value?

Why dedendum Value is more than addendum value? In order to get clearance between the teeth of one gear and bottom surface of mating gear so as to avoid interference, dedendum is having more value than addendum.

What is the value of addendum *?

What is the value of addendum? Explanation: This is the radial distance from the pitch circle to the tooth tip. Its value is equal to 1 module. Another term diametral pitch is defined as a number of teeth per inch of pitch circle diameter.

What is the value of addendum?

1 module
What is the value of addendum? Explanation: This is the radial distance from the pitch circle to the tooth tip. Its value is equal to 1 module. Another term diametral pitch is defined as a number of teeth per inch of pitch circle diameter.