O-Ring Groove Generator creates fully dimensioned O-ring grooves right on your model — in seconds instead of catalog-and-calculator minutes.

Shaft first — the way engineers actually work
Pick one circular edge on a shaft shoulder or bore and you are done: the add-in measures the diameter, detects shaft vs. bore (piston vs. rod groove) automatically and suggests matching standard O-rings, best fit first. Matching is done correctly at the seat, not at the piston diameter: piston grooves match the ring to the groove bottom (target ≈ 2 % stretch), rod grooves to the rod (≈ 1 %). The seat diameter is shown in every suggestion.

Four seal types

• Piston groove (radial, groove on shaft/piston)
• Rod groove (radial, groove in the bore)
• Axial groove, internal pressure
• Axial groove, external pressure/vacuum

Guideline-based design — transparent and overridable
Groove depth, width, bottom and edge radii, squeeze, gap and fill ratio are computed from ISO 3601/manufacturer guideline values and reported live in the dialog, including warnings (fill too high, groove too close to the edge, thin web). Manufacturing hints included: tolerance recommendations (groove bottom h11, bore H8) and Ra values. Company standards? Override any value manually.

Tidy timeline, intuitive control
The groove appears as ONE named item ("O-ring groove d1×d2") in the timeline — no clutter of sketches, planes and cuts. The offset from the reference edge has a draggable arrow in the model (like Extrude); "flip direction" puts the groove on the other side. To change a groove, delete the item and recreate it in seconds.

Thinks along

• Chamfers and fillets on the reference edge are skipped automatically — the cylinder behind becomes the groove carrier.
• Works in nested, transformed components (native-context creation).
• Optionally creates the O-ring as a body: nominal (torus) or installed-deformed with a volume-true profile, rubber material applied for correct display and mass.
• Catalog of 800+ metric stock sizes (cord 1.0–6.0 mm); any custom size manually.
• Fully bilingual EN/DE, following the Autodesk® Fusion® UI language.

Who is it for?
Mechanical design engineers, jig/fixture and prototype builders, hydraulics/pneumatics — wherever O-ring grooves recur and should look consistent across the team.

Note
All values are guideline values for standard applications based on ISO 3601 methodology and manufacturer practice (e.g. ERIKS/Parker/Trelleborg). For high pressure, temperature extremes, swelling media or safety-critical parts, consult the manufacturer's catalog and ISO 3601-2; responsibility remains with the engineer. Inch/AS568 sizes via manual input.