Diameter Of Centre Crankshaft Under Flywheel At Max Torque Calculator

Formula Used:

\[ ds = \left( \frac{16}{\pi \cdot \tau} \cdot \sqrt{(R_b \cdot cg)^2 + (P_t \cdot r)^2} \right)^{1/3} \]

Shear Stress in Crankshaft Under Flywheel (τ):

Resultant Reaction on CrankShaft Bearing (R_b):

Centre Crankshaft Bearing Gap From Flywheel (cg):

Tangential Force at Crank Pin (P_t):

Distance Between Crank Pin And Crankshaft (r):

Diameter of Shaft Under Flywheel (ds):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the Diameter of Centre Crankshaft Under Flywheel Calculation?

This calculation determines the required diameter of the crankshaft section under the flywheel at maximum torque conditions. It ensures the shaft can withstand the combined shear stresses from resultant bearing reactions and tangential forces at the crank pin.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ ds = \left( \frac{16}{\pi \cdot \tau} \cdot \sqrt{(R_b \cdot cg)^2 + (P_t \cdot r)^2} \right)^{1/3} \]

Where:

\( ds \) — Diameter of Shaft Under Flywheel (m)
\( \tau \) — Shear Stress in Crankshaft Under Flywheel (Pa)
\( R_b \) — Resultant Reaction on CrankShaft Bearing (N)
\( cg \) — Centre Crankshaft Bearing Gap From Flywheel (m)
\( P_t \) — Tangential Force at Crank Pin (N)
\( r \) — Distance Between Crank Pin And Crankshaft (m)
\( \pi \) — Archimedes' constant (approximately 3.1416)

Explanation: The formula calculates the minimum shaft diameter required to withstand the combined torsional and bending moments under maximum torque conditions.

3. Importance of Shaft Diameter Calculation

Details: Proper shaft diameter calculation is crucial for ensuring mechanical integrity, preventing fatigue failure, and maintaining optimal performance of the crankshaft assembly under maximum torque conditions.

4. Using the Calculator

Tips: Enter all values in appropriate units (Pa for stress, N for forces, m for distances). All input values must be positive numbers. The calculator will compute the minimum required shaft diameter.

5. Frequently Asked Questions (FAQ)

Q1: Why is this calculation important for crankshaft design?
A: This calculation ensures the crankshaft can withstand the maximum torque loads without failure, preventing catastrophic engine damage.

Q2: What factors influence the shaft diameter?
A: The diameter depends on material shear strength, bearing reactions, force magnitudes, and geometric distances in the crankshaft assembly.

Q3: How accurate is this calculation?
A: This provides a theoretical minimum diameter. Actual designs should include safety factors and consider additional loads and fatigue considerations.

Q4: Can this formula be used for other shaft calculations?
A: While based on fundamental mechanics principles, this specific formula is tailored for crankshafts under flywheel loading conditions.

Q5: What units should be used for input values?
A: Use consistent SI units: Pascals for stress, Newtons for forces, and meters for distances to get diameter in meters.