Length of crankpin given bending moment in central plane of crankweb Calculator

✖Bending Moment at central plane of crank web is the reaction induced in the central plane of the crank web when an external force or moment is applied to the crank web causing it to bend.ⓘ Bending Moment at Central Plane of Crank Web [M_b]			+10% -10%
✖Force on Crankweb is the force acting onto the crankweb used in assembly of crankshaft & connecting rod, converts reciprocation of piston to rotation of crankshaft.ⓘ Force on Crankweb [P]			+10% -10%
✖Thickness of Crank Web is defined as the thickness of the crank web (the portion of a crank between the crankpin and the shaft) measured parallel to the crankpin longitudinal axis.ⓘ Thickness of Crank Web [t]			+10% -10%

✖Length of Crank Pin is the size of the crankpin from one end to the other and tells how long is the crankpin.ⓘ Length of crankpin given bending moment in central plane of crankweb [l_c]

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Length of crankpin given bending moment in central plane of crankweb Solution

STEP 0: Pre-Calculation Summary

Formula Used

Length of Crank Pin = (Bending Moment at Central Plane of Crank Web/Force on Crankweb-0.5*Thickness of Crank Web)/0.75
l_c = (M_b/P-0.5*t)/0.75
This formula uses 4 Variables

Variables Used

Length of Crank Pin - (Measured in Meter) - Length of Crank Pin is the size of the crankpin from one end to the other and tells how long is the crankpin.
Bending Moment at Central Plane of Crank Web - (Measured in Newton Meter) - Bending Moment at central plane of crank web is the reaction induced in the central plane of the crank web when an external force or moment is applied to the crank web causing it to bend.
Force on Crankweb - (Measured in Newton) - Force on Crankweb is the force acting onto the crankweb used in assembly of crankshaft & connecting rod, converts reciprocation of piston to rotation of crankshaft.
Thickness of Crank Web - (Measured in Meter) - Thickness of Crank Web is defined as the thickness of the crank web (the portion of a crank between the crankpin and the shaft) measured parallel to the crankpin longitudinal axis.

STEP 1: Convert Input(s) to Base Unit

Bending Moment at Central Plane of Crank Web: 250 Newton Meter --> 250 Newton Meter No Conversion Required
Force on Crankweb: 6500 Newton --> 6500 Newton No Conversion Required
Thickness of Crank Web: 40 Millimeter --> 0.04 Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

l_c = (M_b/P-0.5*t)/0.75 --> (250/6500-0.5*0.04)/0.75

Evaluating ... ...

l_c = 0.0246153846153846

STEP 3: Convert Result to Output's Unit

0.0246153846153846 Meter -->24.6153846153846 Millimeter (Check conversion here)

FINAL ANSWER

24.6153846153846 ≈ 24.61538 Millimeter <-- Length of Crank Pin

(Calculation completed in 00.007 seconds)

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Home » Physics » IC Engine » Design of IC Engine Components » Crankshaft » Design of Side Crankshaft » Mechanical » Design of Crank Web at Top Dead Centre Position » Length of crankpin given bending moment in central plane of crankweb

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Created by Saurabh Patil

Shri Govindram Seksaria Institute of Technology and Science (SGSITS ), Indore

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< Design of Crank Web at Top Dead Centre Position Calculators

Bending stress in central plane of crankweb

LaTeX Go Bending Stress in Crankweb = (6*(Force on Crankweb*(Length of Crank Pin*0.75+Thickness of Crank Web/2)))/(Thickness of Crank Web^2*Width of Crank Web)

Thickness of crankweb given bending moment at bearing 1 of side crankshaft at TDC position

LaTeX Go Thickness of Crank Web = Bending Moment at Bearing1 of Crankshaft/Force on Crank Pin-0.75*Length of Crank Pin-0.5*Length of Bearing1 of Crankshaft

Bending moment in central plane of crankweb

LaTeX Go Bending Moment at Central Plane of Crank Web = Force on Crankweb*(Length of Crank Pin*0.75+Thickness of Crank Web/2)

Direct compressive stress in central plane of crankweb of side crankshaft at TDC Position

LaTeX Go Direct Compressive Stress in Crankweb = Force on Crankweb/(Width of Crank Web*Thickness of Crank Web)

Length of crankpin given bending moment in central plane of crankweb Formula

LaTeX Go

Length of Crank Pin = (Bending Moment at Central Plane of Crank Web/Force on Crankweb-0.5*Thickness of Crank Web)/0.75
l_c = (M_b/P-0.5*t)/0.75

Crank Pin for Different Engines

In a single-cylinder engine, straight engine, or flat engine, each crankpin normally serves just one cylinder. This results in a relatively simple design and it is the cheapest to produce. Most V engines have each pair of cylinders sharing a crankpin. This usually requires an offset between the cylinders in each bank, resulting in a simple connecting rod design. If a cylinder offset is not used, then the connecting rods must be articulated or forked at the big end. Forked connecting rods are mainly used in V-twin motorcycle engines, but in the past were found on a number of automobile and aero engines, such as the Rolls-Royce Merlin aero engine of the WWII era. Radial engines use a more complicated version of articulated connecting rods, where a single "master" connecting rod is attached to the single crankpin (one for each row in multi-row designs), and smaller bearings for each of the corresponding cylinders machined into the big end of the master rod.

How to Calculate Length of crankpin given bending moment in central plane of crankweb?

Length of crankpin given bending moment in central plane of crankweb calculator uses Length of Crank Pin = (Bending Moment at Central Plane of Crank Web/Force on Crankweb-0.5*Thickness of Crank Web)/0.75 to calculate the Length of Crank Pin, Length of crankpin given bending moment in central plane of crankweb is the total length of the crankpin that is used in the assembly of connecting rod with the crank. Length of Crank Pin is denoted by l_c symbol.

How to calculate Length of crankpin given bending moment in central plane of crankweb using this online calculator? To use this online calculator for Length of crankpin given bending moment in central plane of crankweb, enter Bending Moment at Central Plane of Crank Web (M_b), Force on Crankweb (P) & Thickness of Crank Web (t) and hit the calculate button. Here is how the Length of crankpin given bending moment in central plane of crankweb calculation can be explained with given input values -> 24615.38 = (250/6500-0.5*0.04)/0.75.

FAQ

What is Length of crankpin given bending moment in central plane of crankweb?

Length of crankpin given bending moment in central plane of crankweb is the total length of the crankpin that is used in the assembly of connecting rod with the crank and is represented as l_c = (M_b/P-0.5*t)/0.75 or Length of Crank Pin = (Bending Moment at Central Plane of Crank Web/Force on Crankweb-0.5*Thickness of Crank Web)/0.75. Bending Moment at central plane of crank web is the reaction induced in the central plane of the crank web when an external force or moment is applied to the crank web causing it to bend, Force on Crankweb is the force acting onto the crankweb used in assembly of crankshaft & connecting rod, converts reciprocation of piston to rotation of crankshaft & Thickness of Crank Web is defined as the thickness of the crank web (the portion of a crank between the crankpin and the shaft) measured parallel to the crankpin longitudinal axis.

How to calculate Length of crankpin given bending moment in central plane of crankweb?

Length of crankpin given bending moment in central plane of crankweb is the total length of the crankpin that is used in the assembly of connecting rod with the crank is calculated using Length of Crank Pin = (Bending Moment at Central Plane of Crank Web/Force on Crankweb-0.5*Thickness of Crank Web)/0.75. To calculate Length of crankpin given bending moment in central plane of crankweb, you need Bending Moment at Central Plane of Crank Web (M_b), Force on Crankweb (P) & Thickness of Crank Web (t). With our tool, you need to enter the respective value for Bending Moment at Central Plane of Crank Web, Force on Crankweb & Thickness of Crank Web 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 Length of Crank Pin?

In this formula, Length of Crank Pin uses Bending Moment at Central Plane of Crank Web, Force on Crankweb & Thickness of Crank Web. We can use 1 other way(s) to calculate the same, which is/are as follows -

Length of Crank Pin = (((Bending Stress in Crankweb*Thickness of Crank Web^2*Width of Crank Web)/6)/Force on Crankweb-0.5*Thickness of Crank Web)/0.75

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