1. What is Gear Module?

The gear module (m) 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 gear module formula:

Where:

• \( m_{gear} \) — Gear module (mm)
• \( PD \) — Pitch diameter (mm)
• \( N \) — Number of teeth

Explanation: The module determines the size and spacing of gear teeth, with standardized values used in gear manufacturing.

3. Importance of Gear Module Calculation

Details: Accurate module calculation is essential for proper gear meshing, power transmission efficiency, and preventing premature gear failure in mechanical systems.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: What is the relationship between module and tooth size?
A: The module directly determines tooth size - larger modules mean larger, stronger teeth that can transmit more power.

Q2: Are module values standardized?
A: Yes, gear modules follow standardized values (e.g., 1, 1.25, 1.5, 2, 2.5, 3, etc.) to ensure compatibility between gears.

Q3: How does module affect gear ratio?
A: Module doesn't directly affect gear ratio, which is determined by the number of teeth. However, modules must match for gears to mesh properly.

Q4: Can I calculate module from other gear parameters?
A: Yes, module can also be calculated from circular pitch (m = p/π) or from the addendum (m = addendum/1).

Q5: What are typical module values for different applications?
A: Small modules (0.5-2 mm) for precision instruments, medium modules (2-5 mm) for automotive applications, and larger modules for heavy machinery.