Strong Seals for Large Applications
For applications currently utilizing molded large-diameter o-rings, seals produced via conventional bonding methods, or cases where optimal seal selection is unclear, Apple Rubber's MacrOring® technology presents a superior, cost-effective alternative. Developed in response to evolving market requirements, MacrOring® seals offer enhanced mechanical properties, increased dimensional capabilities, and tighter tolerance control compared to traditional slash-and-glue bonded seals.
MacrOring® Seal Technology Overview
MacrOring® seals are produced using Thermobonding, Apple Rubber's proprietary manufacturing process for large-diameter o-rings and custom sealing elements. The technology accommodates internal diameters ranging from 50.8 mm (2″) to 12,700 mm (500″) and beyond, with cross-sectional dimensions spanning 1.78 mm (0.070″) to 25.4 mm (1.0″). Custom engineered seals can be designed to meet specific performance criteria, with rapid prototyping and sample production capabilities available within a 24-hour window.
Comprehensive Quality Assurance Protocol
Quality control is intrinsic to the MacrOring® manufacturing process, with stringent process monitoring at each production stage. Our quality assurance measures include:
- Fourier Transform Infrared (FTIR) spectroscopy for material composition verification
- Incoming elastomeric cord material certification
- Tensile strength evaluation and application-specific mechanical testing
- AppleLab® Advanced Testing Laboratory for comprehensive specification validation
Cost-Efficiency Analysis
MacrOring® seals offer a cost-effective solution for both high-volume production and low-quantity specialized applications. The Thermobonding process yields additional cost benefits over traditional compression molding by eliminating the need for expensive tooling and minimizing material waste. On-demand production capabilities of MacrOring® seals facilitate rapid response times, mitigating potential supply chain disruptions and production delays.
Available Materials*
Dimensional Tolerance
| I.D. RANGE (in.) | TOLERANCE (in.) |
|---|---|
| 1.17 – 1.90 | =±.020 |
| 1.91 – 3.08 | =±.025 |
| 3.09 – 3.99 | =±.031 |
| 4.00 – 5.99 | =±.039 |
| 6.00 – 7.99 | =±.050 |
| 8.00 – 10.99 | =±.063 |
| 11.00 – 16.99 | =±.079 |
| 17.00 – 21.99 | =±.100 |
| 22.00 – 26.00 | =±.125 |
| 27.00 – 28.99 | =±.140 |
| 29.00 and over | To find the dimensional tolerance multiply by 0.6% |
| View our complete guide on Thermobond Dimensional Tolerances | |
*Special materials not listed here are available upon request.
For more information on MacrOring® seals, call or contact Apple Rubber today.