Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position Calculator

✖Bending Moment at Bearing1 of Crankshaft is the moment acting on the 1st bearing of the crankshaft which tends to bend it when a force acts on it.ⓘ Bending Moment at Bearing1 of Crankshaft [M_b1]			+10% -10%
✖Force on crank pin is the force acting onto the crankpin used in the assembly of the crank, and the connecting rod.ⓘ Force on Crank Pin [P_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 Bearing1 of Crankshaft is the length of the 1st bearing of a crankshaft and this bearing supports the crankshaft.ⓘ Length of Bearing1 of Crankshaft [l₁]			+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 at bearing 1 of side crankshaft at TDC position [l_c]

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Formula

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Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position

Formula

`"l"_{"c"} = ((("M"_{"b"}"1")/"P"_{"p"})-("t")-(0.5*"l"_{"1"}))/0.75`

Example

`"381.1111mm"=(("650000N*mm"/"1950N")-("40mm")-(0.5*"15mm"))/0.75`

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Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position Solution

STEP 0: Pre-Calculation Summary

Formula Used

Length of Crank Pin = ((Bending Moment at Bearing1 of Crankshaft/Force on Crank Pin)-(Thickness of Crank Web)-(0.5*Length of Bearing1 of Crankshaft))/0.75
l_c = ((M_b1/P_p)-(t)-(0.5*l₁))/0.75
This formula uses 5 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 Bearing1 of Crankshaft - (Measured in Newton Meter) - Bending Moment at Bearing1 of Crankshaft is the moment acting on the 1st bearing of the crankshaft which tends to bend it when a force acts on it.
Force on Crank Pin - (Measured in Newton) - Force on crank pin is the force acting onto the crankpin used in the assembly of the crank, and the connecting rod.
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.
Length of Bearing1 of Crankshaft - (Measured in Meter) - Length of Bearing1 of Crankshaft is the length of the 1st bearing of a crankshaft and this bearing supports the crankshaft.

STEP 1: Convert Input(s) to Base Unit

Bending Moment at Bearing1 of Crankshaft: 650000 Newton Millimeter --> 650 Newton Meter (Check conversion here)
Force on Crank Pin: 1950 Newton --> 1950 Newton No Conversion Required
Thickness of Crank Web: 40 Millimeter --> 0.04 Meter (Check conversion here)
Length of Bearing1 of Crankshaft: 15 Millimeter --> 0.015 Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

l_c = ((M_b1/P_p)-(t)-(0.5*l₁))/0.75 --> ((650/1950)-(0.04)-(0.5*0.015))/0.75

Evaluating ... ...

l_c = 0.381111111111111

STEP 3: Convert Result to Output's Unit

0.381111111111111 Meter -->381.111111111111 Millimeter (Check conversion here)

FINAL ANSWER

381.111111111111 ≈ 381.1111 Millimeter <-- Length of Crank Pin

(Calculation completed in 00.004 seconds)

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Home » Physics » IC Engine » Design of IC Engine Components » Crankshaft » Design of Side Crankshaft » Design of Bearing at Top Dead Centre Position » Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position

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< 14 Design of Bearing at Top Dead Centre Position Calculators

Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position

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

Length of Bearing 1 of Side Crankshaft at TDC Position given Bending Moment at Bearing

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

Bending moment at bearing 1 of side crankshaft at TDC position

Go Bending Moment at Bearing1 of Crankshaft = Force on Crank Pin*((0.75*Length of Crank Pin)+(Thickness of Crank Web)+(0.5*Length of Bearing1 of Crankshaft))

Overhang Distance of piston force from Bearing 1 of side crankshaft at TDC position

Go Overhang Distance of Piston Force from Bearing1 = (Vertical Reaction at Bearing 2 due to Crankpin*Distance Between Bearing1&2 of Side Crankshaft)/Force on Crank Pin

Bearing pressure at bearing1 of side crankshaft at TDC position

Go Bearing Pressure of Journal at Bearing 1 = (Resultant Reaction on CrankShaft Bearing 1)/(Diameter of Journal or Shaft at Bearing 1*Length of Bearing1 of Crankshaft)

Diameter of journal at bearing1 of side crankshaft at TDC position

Go Diameter of Journal or Shaft at Bearing 1 = Resultant Reaction on CrankShaft Bearing 1/(Length of Bearing1 of Crankshaft*Bearing Pressure of Journal at Bearing 1)

Length of bearing1 of side crankshaft at TDC position

Go Length of Bearing1 of Crankshaft = Resultant Reaction on CrankShaft Bearing 1/(Bearing Pressure of Journal at Bearing 1*Diameter of Journal or Shaft at Bearing 1)

Diameter of shaft at bearing1 of side crankshaft at TDC position

Go Diameter of Journal or Shaft at Bearing 1 = ((32*Bending Moment at Bearing1 of Crankshaft)/(pi*Bending Stress at Bearing1 of Crankshaft))^(1/3)

Bending stress in shaft at bearing1 of side crankshaft at TDC position

Go Bending Stress at Bearing1 of Crankshaft = (32*Bending Moment at Bearing1 of Crankshaft)/(pi*Diameter of Journal or Shaft at Bearing 1^3)

Bending moment in shaft at bearing1 of side crankshaft at TDC position

Go Bending Moment at Bearing1 of Crankshaft = (Bending Stress at Bearing1 of Crankshaft*pi*Diameter of Journal or Shaft at Bearing 1^3)/32

Minimum length of Bearing 1 of side crankshaft at TDC position given crankpin diameter

Go Length of Bearing1 of Crankshaft = 1.5*Diameter of Crank Pin

Maximum length of Bearing 1 of side crankshaft at TDC position given crankpin diameter

Go Length of Bearing1 of Crankshaft = 2*Diameter of Crank Pin

Minimum thickness of crankweb given crankpin diameter

Go Thickness of Crank Web = 0.45*Diameter of Crank Pin

Maximum thickness of crankweb given crankpin diameter

Go Thickness of Crank Web = 0.75*Diameter of Crank Pin

Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position Formula

Length of Crank Pin = ((Bending Moment at Bearing1 of Crankshaft/Force on Crank Pin)-(Thickness of Crank Web)-(0.5*Length of Bearing1 of Crankshaft))/0.75
l_c = ((M_b1/P_p)-(t)-(0.5*l₁))/0.75

Connecting Rod

The main function of a connecting rod is to form a link between a piston and crankshaft. A small end of the connecting rod is connected to the piston with a gudgeon pin and the big end is separated into two parts for ease of assembly with a crankpin. The two parts of the big end are the bearing cap and big end housing. Both are being bolted together. This is done for ease of assembly of connecting rod with a crankpin. To supply oil to the big end, the oil hole is drilled from the big end.

Crankpin Material

Crankpins are generally made of carbon steel, forged steel, and alloy steel. It also improves the strength of the component. The surface of the crankpin is hardened by case carburizing, nitriding, or induction hardening.

How to Calculate Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position?

Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position calculator uses Length of Crank Pin = ((Bending Moment at Bearing1 of Crankshaft/Force on Crank Pin)-(Thickness of Crank Web)-(0.5*Length of Bearing1 of Crankshaft))/0.75 to calculate the Length of Crank Pin, Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position is the length of the crankpin of a connecting rod assembly of an Internal Combustion Engine. Length of Crank Pin is denoted by l_c symbol.

How to calculate Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position using this online calculator? To use this online calculator for Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position, enter Bending Moment at Bearing1 of Crankshaft (M_b1), Force on Crank Pin (P_p), Thickness of Crank Web (t) & Length of Bearing1 of Crankshaft (l₁) and hit the calculate button. Here is how the Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position calculation can be explained with given input values -> -18888.888889 = ((650/1950)-(0.04)-(0.5*0.015))/0.75.

FAQ

What is Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position?

Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position is the length of the crankpin of a connecting rod assembly of an Internal Combustion Engine and is represented as l_c = ((M_b1/P_p)-(t)-(0.5*l₁))/0.75 or Length of Crank Pin = ((Bending Moment at Bearing1 of Crankshaft/Force on Crank Pin)-(Thickness of Crank Web)-(0.5*Length of Bearing1 of Crankshaft))/0.75. Bending Moment at Bearing1 of Crankshaft is the moment acting on the 1st bearing of the crankshaft which tends to bend it when a force acts on it, Force on crank pin is the force acting onto the crankpin used in the assembly of the crank, and the connecting rod, 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 & Length of Bearing1 of Crankshaft is the length of the 1st bearing of a crankshaft and this bearing supports the crankshaft.

How to calculate Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position?

Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position is the length of the crankpin of a connecting rod assembly of an Internal Combustion Engine is calculated using Length of Crank Pin = ((Bending Moment at Bearing1 of Crankshaft/Force on Crank Pin)-(Thickness of Crank Web)-(0.5*Length of Bearing1 of Crankshaft))/0.75. To calculate Length of crankpin given bending moment at bearing 1 of side crankshaft at TDC position, you need Bending Moment at Bearing1 of Crankshaft (M_b1), Force on Crank Pin (P_p), Thickness of Crank Web (t) & Length of Bearing1 of Crankshaft (l₁). With our tool, you need to enter the respective value for Bending Moment at Bearing1 of Crankshaft, Force on Crank Pin, Thickness of Crank Web & Length of Bearing1 of Crankshaft and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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