1. What is Length of Hub of Bushed Pin Coupling?

Definition: The length of hub in a bushed pin coupling is the measurement through the middle of the coupling (or hub) measuring from end point to end point.

Purpose: It's a critical dimension in coupling design that ensures proper power transmission and mechanical connection between shafts.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( l_h \) — Length of hub (mm)
• \( d \) — Diameter of driving shaft (mm)

Explanation: The hub length is typically 1.5 times the diameter of the driving shaft in standard bushed pin coupling designs.

3. Importance of Hub Length Calculation

Details: Proper hub length ensures sufficient engagement for torque transmission while maintaining space efficiency in mechanical systems.

4. Using the Calculator

Tips: Enter the diameter of driving shaft in mm and tolerance percentage (default 5%). The calculator provides nominal, minimum, and maximum lengths.

5. Frequently Asked Questions (FAQ)

Q1: Why is the hub length 1.5 times shaft diameter?
A: This ratio provides optimal balance between strength (sufficient material) and compactness in typical industrial applications.

Q2: When would I adjust the tolerance value?
A: Adjust tolerance based on manufacturing capabilities or specific application requirements for precision.

Q3: Does this calculation apply to all coupling types?
A: No, this specifically applies to bushed pin couplings. Other coupling types may have different length ratios.

Q4: How does hub length affect coupling performance?
A: Longer hubs provide more surface area for torque transmission but increase overall coupling size and weight.

Q5: Can I use this for non-standard shaft sizes?
A: Yes, the formula works for any shaft diameter, but verify with coupling manufacturer for non-standard applications.

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