Compression Molded & Continuously Molded O-Rings
When nonstandard-size o-rings are required but don’t quite fit into standard AS568, common metric sizes, or are extremely large, custom molded o-rings are recommended. A full range of non-standard o-ring sizes can be custom-made with compression molding and continuous molding.
Compression molded o-rings are produced for static and dynamic applications. Compression molding is preferred when high volumes of small and non-standard sizes are needed.
Continuously molded o-rings are an excellent sealing option for large, non-standard size dynamic applications. Our continuous molding process does not require tooling and can handle virtually any ID size. It is also the best option for smaller amounts of dynamic o-rings where the volumes do not warrant having a tool cut.
Continuously molded o-rings can be used for both dynamic and static applications, as well as high-pressure and vacuum environments. Continuously molded o-rings can be produced in numerous combinations of material, durometer, ID, and cross-section.
Comparisons Between Custom O-Ring Techniques
The performance of continuous molding is similar to that of compression molding, with both being made for static and dynamic applications. For modest volumes of large-diameter o-rings, continuous molding is optimal as there is no tooling cost. Compression molding requires tooling but can be ideal when producing a large volume of o-rings. Vulcanized o-rings can be produced within hours and do not require tooling, and are best suited for static conditions.
|Continuous Molding||Compression Molding||Vulcanized|
|Lead Time||4-6 Weeks||10-12 Weeks||Same/Next Day|
Custom O-Ring Recommendation by O-Ring Size, Application, and Volume
ID: >0.5mm (.019 in.)
ID: >75mm (3 in.)
ID: >800mm (31 in.)
ID: >2,500mm (96 in.)
|Static||Compression Molding||Low Volume (<750): Vulcanization
High Volume (>750): Compression Molding
|Dynamic||Compression Molding||Compression Molding||Low Volume (<100): Continuous Molding
High Volume (>100): Compression Molding
To place an order or request more information on custom molded o-rings which molding you require for your application, give us a call at 832-448-5550 or submit the Product Inquiry Form.