Dedendum Circle Diameter of Gear given Pitch Circle Diameter Calculator

✖Diameter of Pitch Circle of Helical Gear is the diameter of the pitch circle of a gear that touches the meshing gear's pitch circle.ⓘ Diameter of Pitch Circle of Helical Gear [d]			+10% -10%
✖Dedendum of Helical Gear is defined as the radial distance from the pitch circle of a toothed wheel or a gear to the bottom of the tooth space or groove.ⓘ Dedendum of Helical Gear [d_h]			+10% -10%

✖The Dedendum Circle Diameter of Helical Gear is the diameter of a circle touching the root of the gear teeth.ⓘ Dedendum Circle Diameter of Gear given Pitch Circle Diameter [d_f]

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Formula

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Dedendum Circle Diameter of Gear given Pitch Circle Diameter

Formula

d f = d - 2 \cdot d h

Example

108 mm = 118 mm - 2 \cdot 5 mm

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Dedendum Circle Diameter of Gear given Pitch Circle Diameter Solution

STEP 0: Pre-Calculation Summary

Formula Used

Dedendum Circle Diameter of Helical Gear = Diameter of Pitch Circle of Helical Gear-2*Dedendum of Helical Gear
d_f = d-2*d_h
This formula uses 3 Variables

Variables Used

Dedendum Circle Diameter of Helical Gear - (Measured in Meter) - The Dedendum Circle Diameter of Helical Gear is the diameter of a circle touching the root of the gear teeth.
Diameter of Pitch Circle of Helical Gear - (Measured in Meter) - Diameter of Pitch Circle of Helical Gear is the diameter of the pitch circle of a gear that touches the meshing gear's pitch circle.
Dedendum of Helical Gear - (Measured in Meter) - Dedendum of Helical Gear is defined as the radial distance from the pitch circle of a toothed wheel or a gear to the bottom of the tooth space or groove.

STEP 1: Convert Input(s) to Base Unit

Diameter of Pitch Circle of Helical Gear: 118 Millimeter --> 0.118 Meter (Check conversion here)
Dedendum of Helical Gear: 5 Millimeter --> 0.005 Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

d_f = d-2*d_h --> 0.118-2*0.005

Evaluating ... ...

d_f = 0.108

STEP 3: Convert Result to Output's Unit

0.108 Meter -->108 Millimeter (Check conversion here)

FINAL ANSWER

108 Millimeter <-- Dedendum Circle Diameter of Helical Gear

(Calculation completed in 00.004 seconds)

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Osmania University (OU), Hyderabad

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< Core Design Parameters Calculators

Pitch Circle Diameter of Helical Gear

Go Diameter of Pitch Circle of Helical Gear = Number of Teeth on Helical Gear*Normal Module of Helical Gear/cos(Helix Angle of Helical Gear)

Transverse Module of Helical Gear given Normal Module

Go Transverse Module of Helical Gear = Normal Module of Helical Gear/cos(Helix Angle of Helical Gear)

Normal Module of Helical Gear

Go Normal Module of Helical Gear = Transverse Module of Helical Gear*cos(Helix Angle of Helical Gear)

Transverse Module of Helical Gear given Transverse Diametrical Pitch

Go Transverse Module of Helical Gear = 1/Transverse Diametrical Pitch of Helical Gear

Dedendum Circle Diameter of Gear given Pitch Circle Diameter Formula

Dedendum Circle Diameter of Helical Gear = Diameter of Pitch Circle of Helical Gear-2*Dedendum of Helical Gear
d_f = d-2*d_h

Define Helical Gears

A helical gear has a cylindrical pitch surface and teeth that follow a helix on the pitch cylinder. External helical gears have teeth that project outwards, whereas internal helical gears have teeth that project inwards.

How to Calculate Dedendum Circle Diameter of Gear given Pitch Circle Diameter?

Dedendum Circle Diameter of Gear given Pitch Circle Diameter calculator uses Dedendum Circle Diameter of Helical Gear = Diameter of Pitch Circle of Helical Gear-2*Dedendum of Helical Gear to calculate the Dedendum Circle Diameter of Helical Gear, Dedendum Circle Diameter of Gear given Pitch Circle Diameter formula is defined as the diameter of the imaginary circle touching the gear teeth and its center is at the gear's center. Dedendum Circle Diameter of Helical Gear is denoted by d_f symbol.

How to calculate Dedendum Circle Diameter of Gear given Pitch Circle Diameter using this online calculator? To use this online calculator for Dedendum Circle Diameter of Gear given Pitch Circle Diameter, enter Diameter of Pitch Circle of Helical Gear (d) & Dedendum of Helical Gear (d_h) and hit the calculate button. Here is how the Dedendum Circle Diameter of Gear given Pitch Circle Diameter calculation can be explained with given input values -> 108000 = 0.118-2*0.005.

FAQ

What is Dedendum Circle Diameter of Gear given Pitch Circle Diameter?

Dedendum Circle Diameter of Gear given Pitch Circle Diameter formula is defined as the diameter of the imaginary circle touching the gear teeth and its center is at the gear's center and is represented as d_f = d-2*d_h or Dedendum Circle Diameter of Helical Gear = Diameter of Pitch Circle of Helical Gear-2*Dedendum of Helical Gear. Diameter of Pitch Circle of Helical Gear is the diameter of the pitch circle of a gear that touches the meshing gear's pitch circle & Dedendum of Helical Gear is defined as the radial distance from the pitch circle of a toothed wheel or a gear to the bottom of the tooth space or groove.

How to calculate Dedendum Circle Diameter of Gear given Pitch Circle Diameter?

Dedendum Circle Diameter of Gear given Pitch Circle Diameter formula is defined as the diameter of the imaginary circle touching the gear teeth and its center is at the gear's center is calculated using Dedendum Circle Diameter of Helical Gear = Diameter of Pitch Circle of Helical Gear-2*Dedendum of Helical Gear. To calculate Dedendum Circle Diameter of Gear given Pitch Circle Diameter, you need Diameter of Pitch Circle of Helical Gear (d) & Dedendum of Helical Gear (d_h). With our tool, you need to enter the respective value for Diameter of Pitch Circle of Helical Gear & Dedendum of Helical Gear and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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