These o-ring groove design guides offer default dimensional guidance for basic o-ring groove design applications. Lastly, the fourth table is for dovetail groove design. The third table is for dynamic industrial reciprocating applications. The second table is for static industrial radial applications. The first table is for industrial face or flange seals.
Internal Pressure FaceSeals: The o-ring OD should be slightly larger than the gland outer diameter (Gland OD) (max 3%)īelow, four standard application groove design guidance tables are presented along with dimensional reference drawings. External Pressure Face Seals: The o-ring ID should be slightly smaller than the gland inner diameter (Gland ID) (max 5%). Rod Gland Seals: The o-ring OD should be slightly larger than the ID gland depth (max 2%). Piston Gland Seals: The ID of the o-ring should be smaller than the OD of the gland so the installed o-ring is always slightly stretched (max 5%). The ID or OD of the o-ring should be sized to create some interference, per the guidelines below: Greater tolerances variations in the machined groove while maintaining acceptable compression squeeze. Smaller required squeeze to create a seal which reduces compression set issues. Most cost-effective if the design uses expensive elastomers such as FKM or FFKMĪdvantages of Larger Cross-Section O-Rings. Advantages of Smaller Cross-Section O-Rings Below, is a list of advantages in the selection of smaller and larger cross-section o-rings. For example, an o-ring with an ID of 5 ¼ can be purchased in four standard AS568 cross-sections. Standard o-rings are available in various cross-sections and inside dimensions (ID). The o-ring cross-section in your design will determine all your subsequent dimensions and specifications. Numerous factors go into the appropriate design of a gland/groove including but not limited to static or dynamic applications, pressure conditions, fluid characteristics being sealed, and tolerances of both the o-ring and groove. These are intended for use in basic design consideration and to understand the core principles involved in o-ring gland/groove design. Global O-Ring and Seal has developed o-ring groove design and gland dimension guidelines. International O-Ring Size Cross Reference Table. The Thin Solid also comes in some different colors than the Original. And it comes with the same lifetime warranty. Yet it has the same internal ridge lining for air circulation and can stretch. It comes in smaller sizes for smaller hands, and it’s just 5½ millimeters thick (compared with the Original’s 8-millimeter size). If you’re looking for a thinner silicone ring that’s closer to the size of a traditional wedding band-maybe you want a subtler ring-the Groove Life Thin Solid Ring is the better choice. 
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