1. What is the Thickness of Key Formula?

The formula calculates the required thickness of a key based on crushing stress. It ensures that the key can withstand the tangential force without failing under crushing stress.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( t \) — Thickness of Key (mm)
• \( F \) — Tangential Force (N)
• \( f_c \) — Crushing Stress in Key (N/mm²)
• \( l \) — Length of Key (mm)

Explanation: The formula calculates the minimum thickness required for a key to prevent crushing failure under the applied tangential force.

3. Importance of Key Thickness Calculation

Details: Proper key thickness calculation is essential for mechanical design to ensure power transmission components can withstand operational forces without failure.

4. Using the Calculator

Tips: Enter tangential force in Newtons, crushing stress in N/mm², and key length in mm. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is tangential force in key design?
A: Tangential force is the force that acts tangent to the shaft surface, transmitted through the key from the rotating component.

Q2: Why is crushing stress important?
A: Crushing stress determines the key's ability to withstand compressive forces without deformation or failure.

Q3: How is key length typically determined?
A: Key length is usually based on hub length and should be sufficient to distribute the force over an adequate area.

Q4: What are typical crushing stress values for keys?
A: Crushing stress values depend on the material, with steel keys typically having higher values than bronze or other materials.

Q5: Can this formula be used for all key types?
A: This formula is primarily for rectangular keys. Other key types (Woodruff, saddle, etc.) may require different calculations.