1. What is the O-Ring Diameter Formula?

The O-Ring diameter formula calculates the outer diameter (OD) of an O-ring based on its inner diameter (ID) and cross-section (CS). This is essential for proper O-ring selection and sealing applications.

2. How Does the Calculator Work?

The calculator uses the O-Ring diameter formula:

Where:

• \( OD \) — Outer Diameter (mm)
• \( ID \) — Inner Diameter (mm)
• \( CS \) — Cross Section (mm)

Explanation: The formula accounts for the simple geometric relationship where the outer diameter equals the inner diameter plus twice the cross-sectional thickness.

3. Importance of O-Ring Dimensions

Details: Accurate O-ring dimensions are crucial for creating effective seals in various applications, preventing leaks and ensuring proper functioning of mechanical systems.

4. Using the Calculator

Tips: Enter inner diameter and cross-section in millimeters. Both values must be positive numbers for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: Why is O-ring sizing important?
A: Proper O-ring sizing ensures effective sealing, prevents leaks, and extends the lifespan of both the O-ring and the equipment it seals.

Q2: What are standard O-ring sizes?
A: O-rings come in standardized sizes based on AS568 and other international standards, but custom sizes are also available for specific applications.

Q3: How do I measure an O-ring?
A: Measure the inner diameter and cross-section thickness. For existing O-rings, the outer diameter can be measured directly and used to verify dimensions.

Q4: What materials are O-rings made from?
A: O-rings are made from various elastomers including Nitrile, Viton, Silicone, EPDM, and others, each with different properties for specific applications.

Q5: When should I replace an O-ring?
A: Replace O-rings when they show signs of wear, compression set, cracking, or when they no longer provide an effective seal.