## What is Dedendum diameter?

The Dedendum Circle Diameter of Medium Size Gear in Terms of Diameter of Pitch Circle and Dedundum formula is defined as the difference of the diameter of the pitch circle and twice the value dedendum is calculated using Diameter of Dedendum Circle = Diameter of the pitch circle of gear-(2*Dedundum).

What is Dedendum circle?

Definition of dedendum circle : the circle touching the bottom of the spaces between the teeth of a gear wheel.

### What is Dedendum formula?

Dedendum (hf) is the distance between the reference line and the tooth root. hf = 1.25 m (2.6) Tooth thickness (s) is basically half the value of pitch (p). * Pitch (p) = πm. s = πm / 2 (2.7)

DEDENDUM Addendum is the height of the tooth above the pitch circle. Dedendum is the depth of the tooth below the pitch circle. Whole Depth is the total length of a tooth space equal to the sum of the addendum and dedendum.

## Is base circle and Dedendum circle same?

base circle being smaller or larger than the dedendum circle. For the gears having small number of teeth, the dedendum circle is small in diameter than its base circle as shown in the figure. pressure angle as regards base circle being smaller or larger than the dedendum circle.

Is Dedendum circle and base circle same?

dedendum circle is the circle joining the roots of the gear teeths . both are different terms and base circle exists outside the dedendum circle . so a small portion of tooth profile existbetween the two circle that is not involute.

### What does PCD stand for?

How to calculate the PCD – Pitch circle diameter

Wheel Type Stud Diameter Inches PCD
Ford-Jeep 1.2″ 5 1/2″
Gemini 7/16″
Land Rover 5/8″ 6 1/2″
Land Cruiser 100 Series 9/16″

What is addendum Dedendum pitch circle?

CIRCLE. DEDENDUM Addendum is the height of the tooth above the pitch circle. Dedendum is the depth of the tooth below the pitch circle. Whole Depth is the total length of a tooth space equal to the sum of the addendum and dedendum.

## How do you calculate addendum and Dedendum of gear?

Now we have the gear ratio i=d2/d1=z2/z1 (gear 1 is the driving gear, and gear 2 is the driven gear). The module also has to do with the tooth height, for standard gears, the tooth height equals to 2.25*m: addendum ha=1*m, dedendum hf=1.25*m, tooth height h=2.25*m.

What is addendum and dedendum circle?

### What is Dedendum in mechanical engineering?

n. 1. ( Mechanical Engineering) a toothed wheel that engages with another toothed wheel or with a rack in order to change the speed or direction of transmitted motion.

How do you calculate PCD?

Wheel PCD Measurement Calculation Formula

1. 4 Stud PCD = Stud distance divided by 0.7071 to get PCD.
2. 5 Stud PCD = Stud distance divided by 0.5878 to get PCD.
3. 6 Stud PCD = Stud distance divided by 0.5 to get PCD.

## What is the formula of PCD?

The Pitch Circle Diameter (PCD) is the diameter of the circle that passes through the centre of all the studs, wheel bolts or wheel rim holes….Pitch Circle Diameter – PCD Calculation Formula.

4 Stud PCD = S
5 Stud PCD = 0.5878
6 Stud PCD = S
0.5

Why is Dedendum value higher than addendum?

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 addendum circle in gear?

: a circle touching the outermost points of the teeth of a circular gear wheel — see pitch line.

What are the addendum and dedendum circles?

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.

## What is the radius of a circle?

Radius of a circle is the distance from the center of the circle to any point on it’s circumference. It is usually denoted by ‘R’ or ‘r’. This quantity has importance in almost all circle-related formulas. The area and circumference of a circle are also measured in terms of radius.

How to calculate dedendum circle diameter of large-size gear?

Dedendum circle diameter of large-size gear calculator uses Diameter of dedendum circle = Module* (Number of teeth-2.5) to calculate the Diameter of dedendum circle, The Dedendum circle diameter of large-size gear formula is defined as the product of module and the term number of teeth minus 2.5. Diameter of dedendum circle is denoted by df symbol.

### How to find diameter twice the radius of a circle?

This diameter is twice that of the radius of a circle i.e. D=2r, where ‘D’ is the diameter and ‘r’ is the radius. Where (h,k) is the center of circle. How to find Radius with Circumference?