Minimum Clearance Calculator

Minimum Clearance Formula:

\[ C_{min} = H_{min} - S_{max} \]

Minimum Clearance:

1. What is Minimum Clearance?

Definition: Minimum clearance is the smallest gap width between two surfaces in clearance fits.

Purpose: It helps engineers ensure proper fit between mating parts in mechanical assemblies.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ C_{min} = H_{min} - S_{max} \]

Where:

\( C_{min} \) — Minimum clearance
\( H_{min} \) — Minimum limit size of hole
\( S_{max} \) — Maximum limit size of shaft

Explanation: The minimum hole size minus the maximum shaft size gives the smallest possible gap between the parts.

3. Importance of Minimum Clearance

Details: Proper clearance calculation ensures parts fit together correctly while allowing for necessary movement or lubrication.

4. Using the Calculator

Tips: Enter the minimum hole size and maximum shaft size. Both values must be > 0 and hole size must be larger than shaft size.

5. Frequently Asked Questions (FAQ)

Q1: What if I get a negative clearance value?
A: Negative clearance indicates interference fit, not clearance fit. Hole size must be larger than shaft size.

Q2: Why is there a ±5% tolerance shown?
A: This represents typical manufacturing tolerances for hole and shaft dimensions.

Q3: What units should I use?
A: Use consistent units (mm, inches, etc.) for both hole and shaft dimensions.

Q4: How precise should my measurements be?
A: For most engineering applications, measurements to 0.0001 units are sufficient.

Q5: Does this account for thermal expansion?
A: No, this calculates static clearance. Consider thermal effects separately for high-temperature applications.