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Radius of Root of Threads Formula

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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. Check FAQs

r = 0.137329 \cdot p

r - Radius of Root of Thread?p - Pitch of Threads?

Radius of Root of Threads Example

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Here is how the Radius of Root of Threads equation looks like with Values.

Here is how the Radius of Root of Threads equation looks like with Units.

Here is how the Radius of Root of Threads equation looks like.

0.5479 = 0.137329 \cdot 3.99

0.5479mm = 0.137329 \cdot 3.99mm

0.5479 = 0.137329 \cdot 3.99

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Radius of Root of Threads Solution

Follow our step by step solution on how to calculate Radius of Root of Threads?

FIRST Step Consider the formula

r = 0.137329 \cdot p

Next Step Substitute values of Variables

∴

r = 0.137329 \cdot 3.99mm

Next Step Convert Units

∴

r = 0.137329 \cdot 0.004m

Next Step Prepare to Evaluate

∴

r = 0.137329 \cdot 0.004

Next Step Evaluate

∴

r = 0.00054794271m

Next Step Convert to Output's Unit

∴

r = 0.54794271mm

LAST Step Rounding Answer

∴

r = 0.5479mm

Radius of Root of Threads Formula Elements

Variables

Radius of Root of Thread

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.

Symbol: r

Measurement: LengthUnit: mm

Note: Value should be greater than 0.

Formulas to find Radius of Root of Thread

Pitch of Threads

Pitch of Threads is the distance between two adjacent threads on a screw, bolt or nut.

Symbol: p

Measurement: LengthUnit: mm

Note: Value should be greater than 0.

Formulas to find Pitch of Threads

Other formulas in Fastner Geometry category

Go Pitch Diameter of Internal Thread given Pitch

D p = D - (0.650 \cdot p)

Go Pitch of Threads given Pitch Diameter of Internal Thread

p = \frac{D - D p}{0.650}

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

D = D p + (0.650 \cdot p)

Go Pitch Diameter of Internal Thread given Height of Fundamental Triangle

D p = D - (0.75 \cdot H)

How to Evaluate Radius of Root of Threads?

Radius of Root of Threads evaluator uses Radius of Root of Thread = 0.137329*Pitch of Threads to evaluate 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 evaluate Radius of Root of Threads using this online evaluator? To use this online evaluator for Radius of Root of Threads, enter Pitch of Threads (p) and hit the calculate button.

FAQs on Radius of Root of Threads

What is the formula to find Radius of Root of Threads?

The formula of Radius of Root of Threads is expressed as Radius of Root of Thread = 0.137329*Pitch of Threads. Here is an example- 547.9427 = 0.137329*0.00399.

How to calculate Radius of Root of Threads?

With Pitch of Threads (p) we can find Radius of Root of Threads using the formula - Radius of Root of Thread = 0.137329*Pitch of Threads.

Can the Radius of Root of Threads be negative?

No, the Radius of Root of Threads, measured in Length cannot be negative.

Which unit is used to measure Radius of Root of Threads?

Radius of Root of Threads is usually measured using the Millimeter[mm] for Length. Meter[mm], Kilometer[mm], Decimeter[mm] are the few other units in which Radius of Root of Threads can be measured.

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