Pre Load in Bolt given Wrench Torque Calculator

✖Wrench Torque for Bolt Tightening is defined as the torque required to create a load on fasteners such as a nut, bolt, or lag screw.ⓘ Wrench Torque for Bolt Tightening [M_t]			+10% -10%
✖Nominal Bolt Diameter is the diameter equal to the external diameter of the threads or the overall diameter of the part of the bolt.ⓘ Nominal Bolt Diameter [d]			+10% -10%

✖Pre Load in Bolt is the tension created in a bolt when it is tightened.ⓘ Pre Load in Bolt given Wrench Torque [P_i]

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Pre Load in Bolt given Wrench Torque Solution

STEP 0: Pre-Calculation Summary

Formula Used

Pre Load in Bolt = Wrench Torque for Bolt Tightening/(0.2*Nominal Bolt Diameter)
P_i = M_t/(0.2*d)
This formula uses 3 Variables

Variables Used

Pre Load in Bolt - (Measured in Newton) - Pre Load in Bolt is the tension created in a bolt when it is tightened.
Wrench Torque for Bolt Tightening - (Measured in Newton Meter) - Wrench Torque for Bolt Tightening is defined as the torque required to create a load on fasteners such as a nut, bolt, or lag screw.
Nominal Bolt Diameter - (Measured in Meter) - Nominal Bolt Diameter is the diameter equal to the external diameter of the threads or the overall diameter of the part of the bolt.

STEP 1: Convert Input(s) to Base Unit

Wrench Torque for Bolt Tightening: 49500 Newton Millimeter --> 49.5 Newton Meter (Check conversion here)
Nominal Bolt Diameter: 15 Millimeter --> 0.015 Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

P_i = M_t/(0.2*d) --> 49.5/(0.2*0.015)

Evaluating ... ...

P_i = 16500

STEP 3: Convert Result to Output's Unit

16500 Newton --> No Conversion Required

FINAL ANSWER

16500 Newton <-- Pre Load in Bolt

(Calculation completed in 00.004 seconds)

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Home » Physics » Design of Machine Elements » Design of Coupling » Threaded Bolted Joints » Mechanical » Load and Strength Characteristics » Pre Load in Bolt given Wrench Torque

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Created by Parul Keshav

National Institute of Technology (NIT), Srinagar

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Pre Load in Bolt given Wrench Torque Formula

LaTeX Go

Pre Load in Bolt = Wrench Torque for Bolt Tightening/(0.2*Nominal Bolt Diameter)
P_i = M_t/(0.2*d)

What is pre-load in wrench torque?

Preload tension is the amount of tension applied to the bolt by a device like a torque wrench or spanner that tightens the bolt into place before the load it will eventually support is added.

How to Calculate Pre Load in Bolt given Wrench Torque?

Pre Load in Bolt given Wrench Torque calculator uses Pre Load in Bolt = Wrench Torque for Bolt Tightening/(0.2*Nominal Bolt Diameter) to calculate the Pre Load in Bolt, Pre load in Bolt given Wrench Torque is defined as the tension created in a fastener when it is tightened. This tensile force in the bolt creates a compressive force in the bolted joint known as clamp force. For practical purposes, the clamping force in an unloaded bolted joint is assumed to be equal to and opposite to the preload. Pre Load in Bolt is denoted by P_i symbol.

How to calculate Pre Load in Bolt given Wrench Torque using this online calculator? To use this online calculator for Pre Load in Bolt given Wrench Torque, enter Wrench Torque for Bolt Tightening (M_t) & Nominal Bolt Diameter (d) and hit the calculate button. Here is how the Pre Load in Bolt given Wrench Torque calculation can be explained with given input values -> 16500 = 49.5/(0.2*0.015).

FAQ

What is Pre Load in Bolt given Wrench Torque?

Pre load in Bolt given Wrench Torque is defined as the tension created in a fastener when it is tightened. This tensile force in the bolt creates a compressive force in the bolted joint known as clamp force. For practical purposes, the clamping force in an unloaded bolted joint is assumed to be equal to and opposite to the preload and is represented as P_i = M_t/(0.2*d) or Pre Load in Bolt = Wrench Torque for Bolt Tightening/(0.2*Nominal Bolt Diameter). Wrench Torque for Bolt Tightening is defined as the torque required to create a load on fasteners such as a nut, bolt, or lag screw & Nominal Bolt Diameter is the diameter equal to the external diameter of the threads or the overall diameter of the part of the bolt.

How to calculate Pre Load in Bolt given Wrench Torque?

Pre load in Bolt given Wrench Torque is defined as the tension created in a fastener when it is tightened. This tensile force in the bolt creates a compressive force in the bolted joint known as clamp force. For practical purposes, the clamping force in an unloaded bolted joint is assumed to be equal to and opposite to the preload is calculated using Pre Load in Bolt = Wrench Torque for Bolt Tightening/(0.2*Nominal Bolt Diameter). To calculate Pre Load in Bolt given Wrench Torque, you need Wrench Torque for Bolt Tightening (M_t) & Nominal Bolt Diameter (d). With our tool, you need to enter the respective value for Wrench Torque for Bolt Tightening & Nominal Bolt Diameter 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 Pre Load in Bolt?

In this formula, Pre Load in Bolt uses Wrench Torque for Bolt Tightening & Nominal Bolt Diameter. We can use 2 other way(s) to calculate the same, which is/are as follows -

Pre Load in Bolt = Elongation of Bolt*Stiffness of Bolt
Pre Load in Bolt = Amount of Compression of Bolted Joint*Combined Stiffness of Bolt

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