Core Diameter of Screw given Direct Compressive Stress Calculator

✖Axial load on screw is the instantaneous load applied to the screw along its axis.ⓘ Axial load on screw [W_a]			+10% -10%
✖Compressive stress in screw is the force per unit area that is responsible for the deformation of the material such that the volume of the material reduces.ⓘ Compressive stress in screw [σ_c]			+10% -10%

✖Core diameter of screw is defined as the smallest diameter of the thread of the screw or nut. The term “minor diameter” replaces the term “core diameter” as applied to the thread of a screw.ⓘ Core Diameter of Screw given Direct Compressive Stress [d_c]

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Core Diameter of Screw given Direct Compressive Stress Solution

STEP 0: Pre-Calculation Summary

Formula Used

Core diameter of screw = sqrt((4*Axial load on screw)/(pi*Compressive stress in screw))
d_c = sqrt((4*W_a)/(pi*σ_c))
This formula uses 1 Constants, 1 Functions, 3 Variables

Constants Used

pi - Archimedes' constant Value Taken As 3.14159265358979323846264338327950288

Functions Used

sqrt - A square root function is a function that takes a non-negative number as an input and returns the square root of the given input number., sqrt(Number)

Variables Used

Core diameter of screw - (Measured in Meter) - Core diameter of screw is defined as the smallest diameter of the thread of the screw or nut. The term “minor diameter” replaces the term “core diameter” as applied to the thread of a screw.
Axial load on screw - (Measured in Newton) - Axial load on screw is the instantaneous load applied to the screw along its axis.
Compressive stress in screw - (Measured in Pascal) - Compressive stress in screw is the force per unit area that is responsible for the deformation of the material such that the volume of the material reduces.

STEP 1: Convert Input(s) to Base Unit

Axial load on screw: 131000 Newton --> 131000 Newton No Conversion Required
Compressive stress in screw: 94 Newton per Square Millimeter --> 94000000 Pascal (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

d_c = sqrt((4*W_a)/(pi*σ_c)) --> sqrt((4*131000)/(pi*94000000))

Evaluating ... ...

d_c = 0.0421237261137401

STEP 3: Convert Result to Output's Unit

0.0421237261137401 Meter -->42.1237261137401 Millimeter (Check conversion here)

FINAL ANSWER

42.1237261137401 ≈ 42.12373 Millimeter <-- Core diameter of screw

(Calculation completed in 00.004 seconds)

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Home » Engineering » Mechanical » Machine Design » Power Screws » Design of Screw and Nut » Core Diameter of Screw given Direct Compressive Stress

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Created by Kumar Siddhant

Indian Institute of Information Technology, Design and Manufacturing (IIITDM), Jabalpur

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< Design of Screw and Nut Calculators

Mean Diameter of Power Screw

Go Mean Diameter of Power Screw = Nominal diameter of screw-0.5*Pitch of power screw thread

Nominal Diameter of Power Screw

Go Nominal diameter of screw = Core diameter of screw+Pitch of power screw thread

Core Diameter of Power Screw

Go Core diameter of screw = Nominal diameter of screw-Pitch of power screw thread

Pitch of Power Screw

Go Pitch of power screw thread = Nominal diameter of screw-Core diameter of screw

Core Diameter of Screw given Direct Compressive Stress Formula

Core diameter of screw = sqrt((4*Axial load on screw)/(pi*Compressive stress in screw))
d_c = sqrt((4*W_a)/(pi*σ_c))

What is Optimum Core Diameter ?

Optimum Core (or Root) Diameter is the diameter calculated using Allowable Stress instead of Direct Compressive Stress. It is greater in dimension than the original Core Diameter and hence provides a lower chance of failure inclusive of jerks.

How to Calculate Core Diameter of Screw given Direct Compressive Stress?

Core Diameter of Screw given Direct Compressive Stress calculator uses Core diameter of screw = sqrt((4*Axial load on screw)/(pi*Compressive stress in screw)) to calculate the Core diameter of screw, Core Diameter of Screw given Direct Compressive Stress is a way of calculating the Core (or Root) Diameter of a screw of selected material, that can function against the working load without failure. It is defined as the smallest diameter of the thread of the screw or nut. The term “minor diameter” replaces the term “core diameter” as applied to the thread of a screw. Core diameter of screw is denoted by d_c symbol.

How to calculate Core Diameter of Screw given Direct Compressive Stress using this online calculator? To use this online calculator for Core Diameter of Screw given Direct Compressive Stress, enter Axial load on screw (W_a) & Compressive stress in screw (σ_c) and hit the calculate button. Here is how the Core Diameter of Screw given Direct Compressive Stress calculation can be explained with given input values -> 42123.73 = sqrt((4*131000)/(pi*94000000)).

FAQ

What is Core Diameter of Screw given Direct Compressive Stress?

Core Diameter of Screw given Direct Compressive Stress is a way of calculating the Core (or Root) Diameter of a screw of selected material, that can function against the working load without failure. It is defined as the smallest diameter of the thread of the screw or nut. The term “minor diameter” replaces the term “core diameter” as applied to the thread of a screw and is represented as d_c = sqrt((4*W_a)/(pi*σ_c)) or Core diameter of screw = sqrt((4*Axial load on screw)/(pi*Compressive stress in screw)). Axial load on screw is the instantaneous load applied to the screw along its axis & Compressive stress in screw is the force per unit area that is responsible for the deformation of the material such that the volume of the material reduces.

How to calculate Core Diameter of Screw given Direct Compressive Stress?

Core Diameter of Screw given Direct Compressive Stress is a way of calculating the Core (or Root) Diameter of a screw of selected material, that can function against the working load without failure. It is defined as the smallest diameter of the thread of the screw or nut. The term “minor diameter” replaces the term “core diameter” as applied to the thread of a screw is calculated using Core diameter of screw = sqrt((4*Axial load on screw)/(pi*Compressive stress in screw)). To calculate Core Diameter of Screw given Direct Compressive Stress, you need Axial load on screw (W_a) & Compressive stress in screw (σ_c). With our tool, you need to enter the respective value for Axial load on screw & Compressive stress in screw and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

How many ways are there to calculate Core diameter of screw?

In this formula, Core diameter of screw uses Axial load on screw & Compressive stress in screw. We can use 3 other way(s) to calculate the same, which is/are as follows -

Core diameter of screw = Nominal diameter of screw-Pitch of power screw thread
Core diameter of screw = (16*Torsional Moment on Screw/(pi*Torsional shear stress in screw))^(1/3)
Core diameter of screw = Axial load on screw/(Transverse Shear Stress in Screw*pi*Thread Thickness*Number of Engaged Threads)

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