1. What is Spur Gear Module?

The module is a fundamental parameter in gear design that represents the size of the gear teeth. It is defined as the ratio of the pitch diameter to the number of teeth and is typically measured in millimeters.

2. How Does the Calculator Work?

The calculator uses the spur gear module formula:

Where:

• \( m \) — Module (mm)
• \( PD \) — Pitch diameter (mm)
• \( N \) — Number of teeth

Explanation: The module determines the size and spacing of gear teeth, which affects the gear's strength, speed ratio, and meshing compatibility with other gears.

3. Importance of Module Calculation

Details: Accurate module calculation is essential for proper gear design, ensuring correct tooth size, proper meshing with mating gears, and optimal power transmission efficiency.

4. Using the Calculator

Tips: Enter pitch diameter in millimeters and number of teeth. Both values must be positive numbers (pitch diameter > 0, teeth ≥ 1).

5. Frequently Asked Questions (FAQ)

Q1: What is the relationship between module and diametral pitch?
A: Module and diametral pitch are inversely related. Module = 25.4 / diametral pitch, where module is in mm and diametral pitch is in inches⁻¹.

Q2: What are standard module values?
A: Module values are typically standardized (e.g., 1, 1.25, 1.5, 2, 2.5, 3, 4, 5, etc.) to ensure compatibility between gears from different manufacturers.

Q3: How does module affect gear strength?
A: Larger modules generally mean larger, stronger teeth that can transmit more power, but they also result in larger, heavier gears.

Q4: Can I use this calculator for helical gears?
A: This formula is specifically for spur gears. For helical gears, the normal module calculation requires additional parameters like helix angle.

Q5: What is the practical significance of module in gear manufacturing?
A: The module determines the cutter size needed for gear production and affects the gear's noise characteristics, efficiency, and load capacity.