Torque Transmitted by Bushed Pin Coupling Calculator

Torque Formula:

\[ M_t = \frac{p_m \times D_b \times l_b \times D_{pin} \times N}{2} \]

Pressure Intensity (p_m):

Bush Outer Diameter (D_b):

Bush Effective Length (l_b):

Pins PCD (D_pin):

Number of Pins (N):

Tolerance:

Torque (N·m):

Tolerance Range (±5%):

1. What is Torque in Bushed Pin Coupling?

Definition: This calculator determines the torque transmitted through a bushed pin coupling based on pressure intensity, bush dimensions, pin arrangement, and tolerance.

Purpose: It helps mechanical engineers and designers calculate the torque capacity of flexible couplings used in power transmission systems.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ M_t = \frac{p_m \times D_b \times l_b \times D_{pin} \times N}{2} \]

Where:

\( M_t \) — Torque transmitted (N·m)
\( p_m \) — Pressure intensity between flange (Pa)
\( D_b \) — Outer diameter of bush (m)
\( l_b \) — Effective length of bush (m)
\( D_{pin} \) — Pitch circle diameter of pins (m)
\( N \) — Number of pins in coupling

Explanation: The formula calculates torque based on the force distribution across the coupling's pins and bushes.

3. Importance of Torque Calculation

Details: Proper torque calculation ensures the coupling can handle the required power transmission without failure, while considering manufacturing tolerances.

4. Using the Calculator

Tips: Enter all dimensions in meters, pressure in Pascals, and number of pins. The tolerance field (default ±5%) accounts for manufacturing variations.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical pressure intensity value?
A: Pressure intensity typically ranges from 0.5-1.5 MPa (500,000-1,500,000 Pa) for rubber bushes.

Q2: How does bush length affect torque capacity?
A: Longer bushes distribute load over greater area, increasing torque capacity proportionally.

Q3: Why include a tolerance field?
A: Manufacturing variations affect actual torque capacity; ±5% is common but adjust based on quality control.

Q4: How many pins are typically used?
A: Most couplings use 4-8 pins, with more pins allowing higher torque capacity.

Q5: What safety factor should be applied?
A: Always apply appropriate safety factor (1.5-3) to calculated torque for design purposes.