Radius of Root of Threads Calculator

✖The Radius of Root of Thread is defined as the radius of the circle touching the root of the screw threads and its center is at the bolt center.ⓘ Radius of Root of Threads [r]

⎘ Copy

👎

Formula

✖

Radius of Root of Threads

Formula

`"r" = 0.137329*"p"`

Example

`"0.547943mm"=0.137329*"3.99mm"`

Calculator

LaTeX

Reset

👍

Download Design of Threaded Fastener Formula PDF

Radius of Root of Threads Solution

STEP 0: Pre-Calculation Summary

Formula Used

Radius of Root of Thread = 0.137329*Pitch of threads
r = 0.137329*p
This formula uses 2 Variables

Variables Used

Radius of Root of Thread - (Measured in Meter) - The Radius of Root of Thread is defined as the radius of the circle touching the root of the screw threads and its center is at the bolt center.
Pitch of threads - (Measured in Meter) - Pitch of threads is the distance between two adjacent threads on a screw, bolt or nut.

STEP 1: Convert Input(s) to Base Unit

Pitch of threads: 3.99 Millimeter --> 0.00399 Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

r = 0.137329*p --> 0.137329*0.00399

Evaluating ... ...

r = 0.00054794271

STEP 3: Convert Result to Output's Unit

0.00054794271 Meter -->0.54794271 Millimeter (Check conversion here)

FINAL ANSWER

0.54794271 ≈ 0.547943 Millimeter <-- Radius of Root of Thread

(Calculation completed in 00.004 seconds)

You are here -

Home » Physics » Design of Machine Elements » Design of Coupling » Design of Threaded Fastener » Fastner Geometry » Radius of Root of Threads

Credits

Created by Vaibhav Malani

National Institute of Technology (NIT), Tiruchirapalli

Vaibhav Malani has created this Calculator and 600+ more calculators!

Verified by Rajat Vishwakarma

University Institute of Technology RGPV (UIT - RGPV), Bhopal

Rajat Vishwakarma has verified this Calculator and 400+ more calculators!

< 25 Fastner Geometry Calculators

Core diameter of Bolt given Tensile Stress

Go Core Diameter of Threaded Bolt = sqrt(4*Tensile Force on Bolt/(pi*Tensile stress in bolt))

Height of Fundamental Triangle of Screw Threads given Minor Diameter of External Thread

Go Height of Fundamental Triangle = (12/17)*(Major Diameter of External Thread-Minor Diameter of External Thread)

Major Diameter of External Thread given Minor Diameter of External Thread

Go Major Diameter of External Thread = Minor Diameter of External Thread+((17/12)*Height of Fundamental Triangle)

Minor Diameter of External Thread given Height of Fundamental Triangle

Go Minor Diameter of External Thread = Major Diameter of External Thread-((17/12)*Height of Fundamental Triangle)

Height of Fundamental Triangle of Screw Threads given Pitch Diameter of Internal Thread

Go Height of Fundamental Triangle = (Major Diameter of Internal Thread-Pitch Diameter of Internal Thread)/0.75

Height of Fundamental Triangle of Screw Threads given Pitch Diameter of External Thread

Go Height of Fundamental Triangle = (Major Diameter of External Thread-Pitch Diameter of External Thread)/0.75

Height of Fundamental Triangle of Screw Threads given Minor Diameter of Internal Thread

Go Height of Fundamental Triangle = (Major Diameter of Internal Thread-Minor Diameter of Internal Thread)/1.25

Major Diameter of Internal Thread given Pitch Diameter of Internal Thread

Go Major Diameter of Internal Thread = Pitch Diameter of Internal Thread+(0.75*Height of Fundamental Triangle)

Pitch Diameter of Internal Thread given Height of Fundamental Triangle

Go Pitch Diameter of Internal Thread = Major Diameter of Internal Thread-(0.75*Height of Fundamental Triangle)

Pitch Diameter of External Thread given Height of Fundamental Triangle

Go Pitch Diameter of External Thread = Major Diameter of External Thread-(0.75*Height of Fundamental Triangle)

Major Diameter of External Thread given Height of Fundamental Triangle

Go Major Diameter of External Thread = Pitch Diameter of External Thread+(0.75*Height of Fundamental Triangle)

Minor Diameter of Internal Thread given Height of Fundamental Triangle

Go Minor Diameter of Internal Thread = Major Diameter of Internal Thread-(1.25*Height of Fundamental Triangle)

Major Diameter of Internal Thread given Height of Fundamental triangle

Go Major Diameter of Internal Thread = Minor Diameter of Internal Thread+(1.25*Height of Fundamental Triangle)

Minor Diameter of Internal Thread given Pitch and Pitch Diameter of Internal Thread

Go Major Diameter of Internal Thread = Pitch Diameter of Internal Thread+(0.650*Pitch of threads)

Major Diameter of External Thread given Pitch and Pitch Diameter of External Thread

Go Major Diameter of External Thread = Pitch Diameter of External Thread+(0.650*Pitch of threads)

Minor Diameter of Internal Thread given Pitch and Major Diameter of Internal Thread

Go Minor Diameter of Internal Thread = Major Diameter of Internal Thread-(1.083*Pitch of threads)

Major Diameter of Internal Thread given Pitch and Minor Diameter of Internal Thread

Go Major Diameter of Internal Thread = (1.083*Pitch of threads)+Minor Diameter of Internal Thread

Minor Diameter of External Thread given Pitch and Major Diameter of Internal Thread

Go Minor Diameter of External Thread = Major Diameter of Internal Thread-(1.227*Pitch of threads)

Major Diameter of Internal Thread given Pitch and Minor Diameter of External Thread

Go Major Diameter of Internal Thread = Minor Diameter of External Thread+(1.227*Pitch of threads)

Pitch of Threads given Pitch Diameter of Internal Thread

Go Pitch of threads = (Major Diameter of Internal Thread-Pitch Diameter of Internal Thread)/0.650

Pitch of Threads given Pitch Diameter of External Thread

Go Pitch of threads = (Major Diameter of External Thread-Pitch Diameter of External Thread)/0.650

Pitch of Threads given Minor Diameter of Internal Thread

Go Pitch of threads = (Major Diameter of Internal Thread-Minor Diameter of Internal Thread)/1.083

Pitch of Threads given Major Diameter of Internal Thread

Go Pitch of threads = (Major Diameter of Internal Thread-Minor Diameter of External Thread)/1.227

Pitch Diameter of Internal Thread given Pitch

Go Pitch Diameter of Internal Thread = Major Diameter of Internal Thread-(0.650*Pitch of threads)

Pitch Diameter of External Thread given Pitch

Go Pitch Diameter of External Thread = Major Diameter of External Thread-(0.650*Pitch of threads)

Radius of Root of Threads Formula

Radius of Root of Thread = 0.137329*Pitch of threads
r = 0.137329*p

What is a fastener?

A fastener or fastening is a hardware device that mechanically joins or affixes two or more objects together. In general, fasteners are used to create non-permanent joints; that is, joints that can be removed or dismantled without damaging the joining components.

How to Calculate Radius of Root of Threads?

Radius of Root of Threads calculator uses Radius of Root of Thread = 0.137329*Pitch of threads to calculate the Radius of Root of Thread, Radius of Root of Threads formula is the radius of the valley generated between the threads. Radius of Root of Thread is denoted by r symbol.

How to calculate Radius of Root of Threads using this online calculator? To use this online calculator for Radius of Root of Threads, enter Pitch of threads (p) and hit the calculate button. Here is how the Radius of Root of Threads calculation can be explained with given input values -> 547.9427 = 0.137329*0.00399.

FAQ

What is Radius of Root of Threads?

Radius of Root of Threads formula is the radius of the valley generated between the threads and is represented as r = 0.137329*p or Radius of Root of Thread = 0.137329*Pitch of threads. Pitch of threads is the distance between two adjacent threads on a screw, bolt or nut.

How to calculate Radius of Root of Threads?

Radius of Root of Threads formula is the radius of the valley generated between the threads is calculated using Radius of Root of Thread = 0.137329*Pitch of threads. To calculate Radius of Root of Threads, you need Pitch of threads (p). With our tool, you need to enter the respective value for Pitch of threads and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

Home

FREE PDFs

🔍 Search