1. What Is The Height Of Fundamental Triangle Of Screw Threads Given Pitch Diameter Of Internal Thread?

The Height of Fundamental Triangle is the height of the thread when the profile is extended to a sharp vee form. It is calculated using the major diameter and pitch diameter of the internal thread.

2. How Does The Calculator Work?

The calculator uses the formula:

Where:

• \( H \) — Height of Fundamental Triangle (m)
• \( D \) — Major Diameter of Internal Thread (m)
• \( Dp \) — Pitch Diameter of Internal Thread (m)

Explanation: The formula calculates the height of the fundamental triangle by taking the difference between the major diameter and pitch diameter, then dividing by 0.75.

3. Importance Of Height Of Fundamental Triangle Calculation

Details: Accurate calculation of the height of fundamental triangle is crucial for thread design, manufacturing, and quality control in mechanical engineering applications.

4. Using The Calculator

Tips: Enter major diameter and pitch diameter in meters. Both values must be positive, and the major diameter must be greater than the pitch diameter.

5. Frequently Asked Questions (FAQ)

Q1: What is the fundamental triangle in screw threads?
A: The fundamental triangle is the theoretical sharp vee form that represents the basic thread profile before rounding at crests and roots.

Q2: Why is the constant 0.75 used in the formula?
A: The constant 0.75 represents the relationship between the height of the fundamental triangle and the difference between major and pitch diameters in standard thread systems.

Q3: Can this formula be used for all thread types?
A: This formula is specifically designed for standard metric and unified thread systems. Special thread forms may require different calculations.

Q4: What are typical values for height of fundamental triangle?
A: Typical values range from a few millimeters to several centimeters, depending on the thread size and pitch.

Q5: How does this relate to thread engagement strength?
A: The height of fundamental triangle affects thread engagement depth, which directly influences the strength and load-carrying capacity of threaded connections.