Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure Calculator

✖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%
✖Bearing Pressure in Crank Pin is the compressive force acting on the contact area between two components of crank pin and bushing having no relative motion between them.ⓘ Bearing Pressure in Crank Pin [Pb_pin]			+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 Crank Pin [l_c]			+10% -10%

✖Diameter of crank pin is the diameter of the crank pin used in connecting the connecting rod with the crank.ⓘ Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure [d_cp]

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Formula

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Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure

Formula

`"d"_{"cp"} = ("P"_{"p"})/("Pb"_{"pin"}*"l"_{"c"})`

Example

`"48mm"=("19500N")/("9.447674N/mm²"*"43mm")`

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Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure Solution

STEP 0: Pre-Calculation Summary

Formula Used

Diameter of Crank Pin = (Force on Crank Pin)/(Bearing Pressure in Crank Pin*Length of Crank Pin)
d_cp = (P_p)/(Pb_pin*l_c)
This formula uses 4 Variables

Variables Used

Diameter of Crank Pin - (Measured in Meter) - Diameter of crank pin is the diameter of the crank pin used in connecting the connecting rod with the crank.
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.
Bearing Pressure in Crank Pin - (Measured in Pascal) - Bearing Pressure in Crank Pin is the compressive force acting on the contact area between two components of crank pin and bushing having no relative motion between them.
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.

STEP 1: Convert Input(s) to Base Unit

Force on Crank Pin: 19500 Newton --> 19500 Newton No Conversion Required
Bearing Pressure in Crank Pin: 9.447674 Newton per Square Millimeter --> 9447674 Pascal (Check conversion here)
Length of Crank Pin: 43 Millimeter --> 0.043 Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

d_cp = (P_p)/(Pb_pin*l_c) --> (19500)/(9447674*0.043)

Evaluating ... ...

d_cp = 0.0480000021267693

STEP 3: Convert Result to Output's Unit

0.0480000021267693 Meter -->48.0000021267693 Millimeter (Check conversion here)

FINAL ANSWER

48.0000021267693 ≈ 48 Millimeter <-- Diameter 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 Centre Crankshaft » Design of Crank Pin at Top Dead Centre Position » Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure

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< 9 Design of Crank Pin at Top Dead Centre Position Calculators

Diameter of crank pin of centre crankshaft at TDC position given bending stress and bending moment

Go Diameter of Crank Pin = ((32*Bending Moment at Central Plane of Crankpin)/(pi*Bending Stress in Crankpin))^(1/3)

Bending Moment at centre plane of crank pin of centre crankshaft at TDC position

Go Bending Moment at Central Plane of Crankpin = Vertical Reaction at Bearing Due to Crankpin*Centre Crankshaft Bearing Gap from CrankPinCentre

Bending stress in crank pin of centre crankshaft at TDC position given diameter of crank pin

Go Bending Stress in Crankpin = (32*Bending Moment at Central Plane of Crankpin)/(pi*Diameter of Crank Pin^3)

Bending Moment at centre plane of crankpin of centre crankshaft at TDC position given bending stress

Go Bending Moment at Central Plane of Crankpin = (pi*Diameter of Crank Pin^3*Bending Stress in Crankpin)/32

Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure

Go Diameter of Crank Pin = (Force on Crank Pin)/(Bearing Pressure in Crank Pin*Length of Crank Pin)

Length of crank pin of centre crankshaft at TDC position given allowable bearing pressure

Go Length of Crank Pin = (Force on Crank Pin)/(Diameter of Crank Pin*Bearing Pressure in Crank Pin)

Force on crank pin given crank pin length, diameter and bearing pressure

Go Force on Crank Pin = Bearing Pressure in Crank Pin*Diameter of Crank Pin*Length of Crank Pin

Diameter of crank pin of centre crankshaft at TDC position given thickness of crank web

Go Diameter of Crank Pin = Thickness of Crank Web/0.7

Diameter of crank pin of centre crankshaft at TDC position given width of crank web

Go Diameter of Crank Pin = Width of Crank Web/1.14

Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure Formula

Diameter of Crank Pin = (Force on Crank Pin)/(Bearing Pressure in Crank Pin*Length of Crank Pin)
d_cp = (P_p)/(Pb_pin*l_c)

What is connecting rod?

The connecting rod is a connection between the piston and a crankshaft. It joins the piston pin with the crankpin. The small end of the connecting rod is connected to the piston pin and the big end to the crank pin. The purpose of the connecting rod is to convert the linear motion of the piston into the rotary motion of the crankshaft.

Shape of Connecting Rod

The connecting rod consists of an I-beam cross-section and is made of forged steel. Aluminum alloy is also used for connecting rods. They are precisely matched in sets of similar weight in order to maintain engine balance. The lighter the connecting rod and piston, the greater the resulting in power and the lesser the vibration because the reciprocating weight is less. The connecting rod carries the power thrust from the piston to the crankpin and hence it must be very strong, rigid, and also as light as possible.

How to Calculate Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure?

Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure calculator uses Diameter of Crank Pin = (Force on Crank Pin)/(Bearing Pressure in Crank Pin*Length of Crank Pin) to calculate the Diameter of Crank Pin, Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure is the external diameter of the crankpin of the center crankshaft at TDC position which is used in the assembly of connecting rod with the crank, designed for when the crank is at the top dead center position and subjected to maximum bending moment and no torsional moment. Diameter of Crank Pin is denoted by d_cp symbol.

How to calculate Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure using this online calculator? To use this online calculator for Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure, enter Force on Crank Pin (P_p), Bearing Pressure in Crank Pin (Pb_pin) & Length of Crank Pin (l_c) and hit the calculate button. Here is how the Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure calculation can be explained with given input values -> 181395.3 = (19500)/(9447674*0.043).

FAQ

What is Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure?

Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure is the external diameter of the crankpin of the center crankshaft at TDC position which is used in the assembly of connecting rod with the crank, designed for when the crank is at the top dead center position and subjected to maximum bending moment and no torsional moment and is represented as d_cp = (P_p)/(Pb_pin*l_c) or Diameter of Crank Pin = (Force on Crank Pin)/(Bearing Pressure in Crank Pin*Length of Crank Pin). Force on crank pin is the force acting onto the crankpin used in the assembly of the crank, and the connecting rod, Bearing Pressure in Crank Pin is the compressive force acting on the contact area between two components of crank pin and bushing having no relative motion between them & Length of Crank Pin is the size of the crankpin from one end to the other and tells how long is the crankpin.

How to calculate Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure?

Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure is the external diameter of the crankpin of the center crankshaft at TDC position which is used in the assembly of connecting rod with the crank, designed for when the crank is at the top dead center position and subjected to maximum bending moment and no torsional moment is calculated using Diameter of Crank Pin = (Force on Crank Pin)/(Bearing Pressure in Crank Pin*Length of Crank Pin). To calculate Diameter of crank pin of centre crankshaft at TDC position given allowable bearing pressure, you need Force on Crank Pin (P_p), Bearing Pressure in Crank Pin (Pb_pin) & Length of Crank Pin (l_c). With our tool, you need to enter the respective value for Force on Crank Pin, Bearing Pressure in Crank Pin & Length of Crank Pin 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 Diameter of Crank Pin?

In this formula, Diameter of Crank Pin uses Force on Crank Pin, Bearing Pressure in Crank Pin & Length of Crank Pin. We can use 3 other way(s) to calculate the same, which is/are as follows -

Diameter of Crank Pin = Thickness of Crank Web/0.7
Diameter of Crank Pin = Width of Crank Web/1.14
Diameter of Crank Pin = ((32*Bending Moment at Central Plane of Crankpin)/(pi*Bending Stress in Crankpin))^(1/3)

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