Torque Transmitted by Bushed Pin Coupling given Force Calculator

Torque Formula:

\[ M_t = \frac{P \times D_{pin} \times N}{2} \]

Force on Each Rubber Bush or Pin:

Pitch Circle Diameter of Pins:

Number of Pins in Coupling:

Torque Transmitted by Coupling:

N·m

1. What is Torque Transmitted by Bushed Pin Coupling?

Definition: This calculator determines the torque capacity of a bushed pin coupling based on the force applied to each pin, the pitch circle diameter, and the number of pins.

Purpose: It helps mechanical engineers and designers properly size couplings for power transmission applications.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ M_t = \frac{P \times D_{pin} \times N}{2} \]

Where:

\( M_t \) — Torque transmitted by coupling (N·m)
\( P \) — Force on each rubber bush or pin (N)
\( D_{pin} \) — Pitch circle diameter of pins (m)
\( N \) — Number of pins in coupling (±5%)

Explanation: The torque is calculated by multiplying the force per pin by the moment arm (pitch diameter) and number of pins, then dividing by 2 for equal distribution.

3. Importance of Torque Calculation

Details: Proper torque calculation ensures the coupling can handle the required power transmission without failure while maintaining system safety.

4. Using the Calculator

Tips: Enter the force per pin in Newtons, pitch circle diameter in meters, and number of pins (which has ±5% tolerance). All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: Why is there a ±5% tolerance on pin count?
A: Manufacturing variations and load distribution factors may affect the actual number of pins carrying the load.

Q2: What's a typical force value for rubber bushings?
A: Typically ranges from 500-2000N per pin depending on bushing material and size.

Q3: How do I determine pitch circle diameter?
A: This is specified by the coupling manufacturer and is based on the coupling size.

Q4: What safety factor should I apply?
A: Most applications use a safety factor of 1.5-2.0 on the calculated torque.

Q5: Can this calculator be used for other coupling types?
A: This formula is specific to bushed pin couplings. Other coupling types have different torque transmission mechanisms.