Design
O-Ring Dovetail Groove Calculator
Size and verify a retaining face-seal groove where the dovetail geometry keeps the O-ring in place during assembly.
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Calculator guidance and result interpretation
What this calculator solves
A dovetail groove retains the ring during inverted or repeated assembly, but its narrow opening makes installation strain and available gland volume important.
When to use it
- •Removable covers with downward-facing grooves
- •Repeated assembly and servicing
- •Vacuum and process-equipment face seals
Input parameters
- Dovetail section
- Depth, base width, neck opening, flank angle and machining tolerances.
- Seal path
- Groove mean diameter and O-ring dimensions used for volume and stretch.
- Assembly conditions
- Material hardness, lubrication and expected installation method.
How to read the results
- Check squeeze and gland fill as for a face seal, then review neck retention separately.
- A neck that retains well may still overstretch or damage the ring during installation.
- Tolerance extremes can reduce both retention and available volume.
Engineering considerations
- Avoid sharp edges at the neck and flanks.
- Very hard or large-section rings may require a different installation method.
- Tooling and inspection capability should be confirmed before releasing the groove.
Related tools and engineering resources
Frequently asked questions
Why use a dovetail O-ring groove?
It mechanically retains the O-ring when a cover is inverted, moved or repeatedly serviced before the mating part is assembled.
Can the neck opening be made as small as possible?
No. More retention also increases installation stretch and damage risk. The opening must balance retention, assembly and tolerance.