1. What is Permissible Intensity of Pressure between Flange and Rubber Bush?

Definition: This is the maximum allowable pressure between the flange and rubber bush in a bushed pin coupling without causing damage or excessive wear.

Purpose: It ensures the coupling operates within safe mechanical limits, preventing premature failure of the rubber bush.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_a \) — Pressure intensity (Pascal)
• \( P \) — Force on each rubber bush or pin (Newton)
• \( D_b \) — Outer diameter of bush (meters)
• \( l_b \) — Effective length of bush (meters)

Explanation: The force is distributed over the contact area between the flange and bush to determine the pressure intensity.

3. Importance of Pressure Calculation

Details: Proper pressure calculation ensures the rubber bush isn't overloaded, maintaining coupling performance and longevity.

4. Using the Calculator

Tips: Enter the force, bush diameter, effective length, and tolerance percentage. Typical tolerance is ±5%.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical acceptable pressure range for rubber bushes?
A: Most rubber bushes can handle 0.5-1.5 MPa, but consult manufacturer specifications.

Q2: Why include a tolerance percentage?
A: Tolerance accounts for manufacturing variations and real-world operating conditions.

Q3: How do I measure the effective length of the bush?
A: It's the length of the bush actually in contact with the flange under operating conditions.

Q4: What happens if pressure exceeds permissible limits?
A: Excessive pressure can cause bush deformation, increased wear, or premature failure.

Q5: How does bush material affect the calculation?
A: Material affects permissible limits but not the pressure calculation itself.

Permissible Intensity of Pressure between Flange and Rubber Bush Calculator© - All Rights Reserved 2025