O-Ring Crush Calculator

O-Ring Crush Formula:

\[ Crush = \frac{CS - Groove\ Depth}{CS} \times 100 \]

Crush Percentage:

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1. What is O-Ring Crush Calculation?

O-Ring crush calculation determines the compression percentage of an O-Ring in its groove. This measurement is critical for ensuring proper sealing performance and preventing failure in hydraulic and pneumatic systems.

2. How Does the Calculator Work?

The calculator uses the O-Ring crush formula:

\[ Crush = \frac{CS - Groove\ Depth}{CS} \times 100 \]

Where:

\( CS \) — Cross section of the O-Ring (in)
\( Groove\ Depth \) — Depth of the groove where O-Ring sits (in)

Explanation: The formula calculates the percentage compression of the O-Ring by comparing the difference between its cross-section and the groove depth relative to its original size.

3. Importance of O-Ring Crush Calculation

Details: Proper O-Ring crush is essential for creating effective seals. Too little crush may cause leakage, while excessive crush can lead to premature failure, extrusion, or compression set.

4. Using the Calculator

Tips: Enter both cross section and groove depth in inches. Ensure values are positive and cross section is greater than groove depth for valid calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is the ideal crush percentage for O-Rings?
A: Typically 10-30% for static seals, though specific applications may vary. Consult manufacturer specifications for optimal performance.

Q2: Why is cross section measurement important?
A: Accurate cross section measurement ensures proper calculation of compression and helps select the correct O-Ring size for the application.

Q3: What happens if crush percentage is too high?
A: Excessive crush can cause high friction, increased wear, compression set, and potential seal failure due to material overstressing.

Q4: How does temperature affect crush calculations?
A: Temperature changes can affect material properties and dimensions. Consider thermal expansion when designing for high-temperature applications.

Q5: Can this calculator be used for metric measurements?
A: While the formula works with any consistent units, this calculator is designed for inches. Convert metric measurements to inches before calculation.