Length of Bush on Crank Pin Calculator

Length of Bush on Crank Pin Formula:

\[ l_c = \frac{P_c}{d_{cp} \times p_b} \]

Force on Crank Pin Bearing:

Inner Diameter of Bush on Crank Pin:

Bearing Pressure of CrankPin Bush:

Length of Bush on Crank Pin (m):

1. What is Length of Bush on Crank Pin?

Definition: This is the length of the bush used in between the crank pin and the crank pin bearing in an engine assembly.

Purpose: Proper bush length calculation ensures adequate bearing surface area to handle the forces while minimizing friction.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ l_c = \frac{P_c}{d_{cp} \times p_b} \]

Where:

\( l_c \) — Length of bush on crank pin (meters)
\( P_c \) — Force on crank pin bearing (Newtons)
\( d_{cp} \) — Inner diameter of bush on crank pin (meters)
\( p_b \) — Bearing pressure of crankpin bush (Pascals)

Explanation: The force is divided by the product of diameter and bearing pressure to determine the required bush length.

3. Importance of Bush Length Calculation

Details: Proper bush length ensures:

Adequate load distribution
Proper heat dissipation
Minimized wear and friction
Optimal engine performance

4. Using the Calculator

Tips:

Enter force in Newtons (N)
Enter inner diameter in meters (m)
Enter bearing pressure in Pascals (Pa)
All values have ±5% tolerance

5. Frequently Asked Questions (FAQ)

Q1: What is typical bearing pressure for crankpin bushes?
A: Typically ranges from 5-15 MPa (5,000,000-15,000,000 Pa) for automotive applications.

Q2: How does bush length affect engine performance?
A: Too short may cause excessive wear, too long increases friction losses.

Q3: What materials are used for crankpin bushes?
A: Typically bronze alloys or aluminum alloys with bearing surfaces.

Q4: How do I measure the inner diameter accurately?
A: Use precision micrometers or bore gauges for accurate measurement.

Q5: Does this include safety factors?
A: No, consider adding appropriate safety factors based on application.