Nominal Diameter of Power Screw Calculator

✖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 [d_c]			+10% -10%
✖Pitch of power screw thread is the distance between screw threads and is commonly used with inch-sized products and specified as threads per inch.ⓘ Pitch of power screw thread [p]			+10% -10%

✖Nominal diameter of screw is defined as the diameter of the cylinder touching the external threads of the screw.ⓘ Nominal Diameter of Power Screw [d]

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Formula

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Nominal Diameter of Power Screw

Formula

`"d" = "d"_{"c"}+"p"`

Example

`"49.8mm"="42mm"+"7.8mm"`

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Nominal Diameter of Power Screw Solution

STEP 0: Pre-Calculation Summary

Formula Used

Nominal diameter of screw = Core diameter of screw+Pitch of power screw thread
d = d_c+p
This formula uses 3 Variables

Variables Used

Nominal diameter of screw - (Measured in Meter) - Nominal diameter of screw is defined as the diameter of the cylinder touching the external threads of the screw.
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.
Pitch of power screw thread - (Measured in Meter) - Pitch of power screw thread is the distance between screw threads and is commonly used with inch-sized products and specified as threads per inch.

STEP 1: Convert Input(s) to Base Unit

Core diameter of screw: 42 Millimeter --> 0.042 Meter (Check conversion here)
Pitch of power screw thread: 7.8 Millimeter --> 0.0078 Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

d = d_c+p --> 0.042+0.0078

Evaluating ... ...

d = 0.0498

STEP 3: Convert Result to Output's Unit

0.0498 Meter -->49.8 Millimeter (Check conversion here)

FINAL ANSWER

49.8 Millimeter <-- Nominal 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 » Nominal Diameter of Power Screw

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Created by Kethavath Srinath

Osmania University (OU), Hyderabad

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Verified by Urvi Rathod

Vishwakarma Government Engineering College (VGEC), Ahmedabad

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< 25 Design of Screw and Nut Calculators

Nominal Diameter of Screw given Transverse Shear Stress at Root of Nut

Go Nominal diameter of screw = Axial load on screw/(pi*Transverse shear stress in nut*Thread Thickness*Number of Engaged Threads)

Transverse Shear Stress at Root of Nut

Go Transverse shear stress in nut = Axial load on screw/(pi*Nominal diameter of screw*Thread Thickness*Number of Engaged Threads)

Thread Thickness at Core Diameter of Screw given Transverse Shear Stress

Go Thread Thickness = Axial load on screw/(pi*Transverse Shear Stress in Screw*Core diameter of screw*Number of Engaged Threads)

Number of Threads in Engagement with Nut given Transverse Shear Stress

Go Number of Engaged Threads = Axial load on screw/(pi*Thread Thickness*Transverse Shear Stress in Screw*Core diameter of screw)

Core Diameter of Screw given Transverse Shear Stress in Screw

Go Core diameter of screw = Axial load on screw/(Transverse Shear Stress in Screw*pi*Thread Thickness*Number of Engaged Threads)

Axial Load on Screw given Transverse Shear Stress

Go Axial load on screw = (Transverse Shear Stress in Screw*pi*Core diameter of screw*Thread Thickness*Number of Engaged Threads)

Transverse Shear Stress in Screw

Go Transverse Shear Stress in Screw = Axial load on screw/(pi*Core diameter of screw*Thread Thickness*Number of Engaged Threads)

Axial Load on Screw given Transverse Shear Stress at Root of Nut

Go Axial load on screw = pi*Transverse shear stress in nut*Thread Thickness*Nominal diameter of screw*Number of Engaged Threads

Overall Efficiency of Power Screw

Go Efficiency of power screw = Axial load on screw*Lead of Power Screw/(2*pi*Torsional Moment on Screw)

Lead of Screw given Overall Efficiency

Go Lead of Power Screw = 2*pi*Efficiency of power screw*Torsional Moment on Screw/Axial load on screw

Core Diameter of Screw given Direct Compressive Stress

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

Helix Angle of Thread

Go Helix angle of screw = atan(Lead of Power Screw/(pi*Mean Diameter of Power Screw))

Mean diameter of Screw given Helix Angle

Go Mean Diameter of Power Screw = Lead of Power Screw/(pi*tan(Helix angle of screw))

Lead of Screw given Helix angle

Go Lead of Power Screw = tan(Helix angle of screw)*pi*Mean Diameter of Power Screw

Core Diameter of Screw given Torsional Shear Stress

Go Core diameter of screw = (16*Torsional Moment on Screw/(pi*Torsional shear stress in screw))^(1/3)

Torsional Shear Stress of Screw

Go Torsional shear stress in screw = 16*Torsional Moment on Screw/(pi*(Core diameter of screw^3))

Torsional Moment in Screw given Torsional Shear Stress

Go Torsional Moment on Screw = Torsional shear stress in screw*pi*(Core diameter of screw^3)/16

Direct Compressive Stress in Screw

Go Compressive stress in screw = (Axial load on screw*4)/(pi*Core diameter of screw^2)

Axial Load on Screw given Direct Compressive Stress

Go Axial load on screw = (Compressive stress in screw*pi*Core diameter of screw^2)/4

Nominal Diameter of Power Screw given Mean Diameter

Go Nominal diameter of screw = Mean Diameter of Power Screw+(0.5*Pitch of power screw thread)

Pitch of Screw given Mean Diameter

Go Pitch of power screw thread = (Nominal diameter of screw-Mean Diameter of Power Screw)/0.5

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

Nominal Diameter of Power Screw Formula

Nominal diameter of screw = Core diameter of screw+Pitch of power screw thread
d = d_c+p

Define Core diameter of Screw?

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 also the term “inside diameter” as applied to the thread of a nut.

How to Calculate Nominal Diameter of Power Screw?

Nominal Diameter of Power Screw calculator uses Nominal diameter of screw = Core diameter of screw+Pitch of power screw thread to calculate the Nominal diameter of screw, The Nominal Diameter of Power Screw formula is defined as the largest diameter of the screw. It is also called major diameter. Nominal diameter of screw is denoted by d symbol.

How to calculate Nominal Diameter of Power Screw using this online calculator? To use this online calculator for Nominal Diameter of Power Screw, enter Core diameter of screw (d_c) & Pitch of power screw thread (p) and hit the calculate button. Here is how the Nominal Diameter of Power Screw calculation can be explained with given input values -> 49800 = 0.042+0.0078.

FAQ

What is Nominal Diameter of Power Screw?

The Nominal Diameter of Power Screw formula is defined as the largest diameter of the screw. It is also called major diameter and is represented as d = d_c+p or Nominal diameter of screw = Core diameter of screw+Pitch of power screw thread. 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 & Pitch of power screw thread is the distance between screw threads and is commonly used with inch-sized products and specified as threads per inch.

How to calculate Nominal Diameter of Power Screw?

The Nominal Diameter of Power Screw formula is defined as the largest diameter of the screw. It is also called major diameter is calculated using Nominal diameter of screw = Core diameter of screw+Pitch of power screw thread. To calculate Nominal Diameter of Power Screw, you need Core diameter of screw (d_c) & Pitch of power screw thread (p). With our tool, you need to enter the respective value for Core diameter of screw & Pitch of power screw thread 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 Nominal diameter of screw?

In this formula, Nominal diameter of screw uses Core diameter of screw & Pitch of power screw thread. We can use 3 other way(s) to calculate the same, which is/are as follows -

Nominal diameter of screw = Mean Diameter of Power Screw+(0.5*Pitch of power screw thread)
Nominal diameter of screw = Axial load on screw/(pi*Transverse shear stress in nut*Thread Thickness*Number of Engaged Threads)
Nominal diameter of screw = sqrt((4*Axial load on screw/(Unit bearing pressure for nut*pi*Number of Engaged Threads))+(Core diameter of screw)^2)

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