450mm ID to 600mm ID / 18" to 24" ID
Buna-N 70 Vulcanized O-Rings Custom Sizes Made Easy
Solve your unique sealing challenges with The O-Ring Store LLC’s Spliced & Vulcanized Buna-N 70 O-Rings. When standard molded O-Rings don’t fit the application or lead times are too long, our custom vulcanized O-Rings deliver fast, flexible, and reliable sealing solutions. Expertly crafted from extruded O-Ring cord and vulcanized for a seamless finish, these O-Rings are available in custom sizes and dimensions to meet the most demanding requirements.
Olypsys® Measurement Verification & Quality Assurance
Every vulcanized O-Ring we produce 48" / 1219mm OD includes a certified Olypsys® Measurement Verification Report, verifying exact ID, OD, and cross-section accuracy for traceable quality assurance. This process ensures precision, trust, and reliability in every seal we manufacture. Customers can rely on our Olypsys-certified measurement data as part of our ISO9001:2015 quality system, reinforcing confidence in every order.
Current Lead Times
Dependent on cord stock availability
- Up to 24 O-Rings: Current Lead Time ~2–5 Days ARO
- 25–100 O-Rings: Current Lead Time ~5–10 Days ARO
- 100+ O-Rings: Current Lead Time ~10–15 Days ARO
Key Features & Benefits
- Custom Sizes and Flexible Solutions:
- Made to your exact inner diameter (ID) and cross-section specifications.
- Available in both inch and metric sizes to ensure the perfect fit for your application.
- Ideal for oversized, non-standard, or hard-to-find O-Ring sizes.
- High-Quality Vulcanization Process:
- Crafted from Buna-N 70-durometer cord, vulcanized for superior sealing performance.
- Inspected using the Olypsys® Large Format Grid for accuracy on sizes under 48", ensuring precision and reliability.
- Temperature and Chemical Resistance:
- Temperature Range: -40°F to +250°F (-40°C to +121°C) for versatile performance in extreme environments.
- Excellent resistance to petroleum-based oils, fuels, hydraulic fluids, silicone lubricants, and water.
- Good tensile strength, abrasion resistance, and dimensional stability.
- Application Flexibility:
- Suitable for dynamic and static sealing in hydraulic and pneumatic systems.
- Works effectively in pumps, valves, motors, cylinders, and other industrial equipment.
- Great for general-purpose sealing, making it one of the most versatile elastomers available.
Applications
- Hydraulics and Pneumatics: Motors, cylinders, and pumps.
- Petroleum Industry: Seals for oils, fuels, and lubricants.
- Industrial and Commercial Equipment: Gasketing, static and dynamic sealing solutions.
- Water Systems: Cold water sealing and applications involving silicone greases or oils.
- Maintenance and Repair Operations (MRO): Ideal for custom solutions in emergencies or quick replacements.
Limitations
While Buna-N/Nitrile offers outstanding performance in most conditions, it is not recommended for:
- Strong acids or ozone exposure.
- Ketones (e.g., acetone, MEK) and halogenated hydrocarbons (e.g., carbon tetrachloride).
- Phosphate ester hydraulic fluids (Skydrol) and automotive brake fluids.
- Nitro hydrocarbons and aromatic hydrocarbons.
Technical Specifications
| Property | Value |
|---|
| Material | Buna-N / Nitrile (NBR) |
| Durometer (Hardness) | 70 Shore A |
| Temperature Range | -40°F to +250°F (-40°C to +121°C) |
| Tensile Strength | Excellent for high-performance sealing |
| Chemical Resistance | Petroleum oils, fuels, hydraulic fluids, water |
| Compression Set | Low, ensuring long-lasting performance |
| Abrasion Resistance | High, ideal for dynamic sealing |
Why Choose The O-Ring Store LLC?
We’re not just a supplier—we’re your partner in sealing solutions, providing unmatched value-added services and quality:
- ISO9001:2015 Certified: Ensures consistent quality and compliance with industry standards.
- Expert Technical Support: Assistance with sizing, material selection, and application recommendations.
- Custom Sizing Made Simple: No need to wait for molded sizes—our vulcanized O-Rings provide fast, accurate results.
- Precision Quality Control: All O-Rings under 48" are inspected using Olypsys® Large Format Grid Measuring Systems for guaranteed accuracy.
- Fast Turnaround Times: Get the O-Rings you need—quickly and efficiently.
- Sustainability Focused: Custom sizing reduces waste and improves efficiency.
- Advanced Tools: Use our O-Ring Cord Cut-Length Calculator for exact measurements and easy ordering.
Experience the Difference
At The O-Ring Store LLC, “We make getting O-Rings easy!” Whether you need a single vulcanized O-Ring or a bulk order, we’re ready to deliver fast, high-quality solutions tailored to your requirements. Our spliced and vulcanized Buna-N 70 O-Rings provide the reliability, durability, and flexibility needed to keep your operations running smoothly.
