cdsl-cad/backend/agent/skills/cad-engine/references/part-skills/source/atomic/revolve-profile-around-axis.atomic.md

Revolve Profile Around Axis Atomic Skill

When to use

• A single feature is created by revolving a 2D profile around an axis: stepped cylinder, shaft shoulder, sleeve, bushing, washer groove, nut blank, knob, or circular recess.
• The feature has a rotational cross-section that is easier to define in side view.

Do not use when

• A plain constant-diameter cylinder can be created more simply by extruding a circle.
• The profile is open, crosses the axis incorrectly, or represents non-axisymmetric geometry.
• The feature is a rectangular plate, bracket wall, or arbitrary cutout.

Recognition features

• Revolution/Revolve/RevCut feature evidence.
• Sketch contains an axis line or construction centerline.
• Multiple coaxial cylindrical, conical, or toroidal surfaces are expected.
• Profile controls axial steps, shoulders, tapers, grooves, or rounded transitions.

Core invariants

• The revolve axis must be explicit and stable.
• The profile must be closed for material-adding revolve.
• Keep the profile on the correct side of the axis to avoid self-intersection.
• Use 360 degrees for complete rotational solids unless a partial sector is requested.
• Use revolved cut, not boss revolve, when removing a groove or internal recess.

Parameter roles

• axis defines the rotation center.
• profile defines the closed side-view outline.
• revolve_angle defines full or partial rotation.
• diameter_steps, axial_lengths, groove_depth, and taper_angle define shape.
• operation_type selects add or cut.

Construction sequence

1. Create a sketch on a plane that contains the desired axis.
2. Draw a construction axis or select a stable centerline.
3. Draw the closed profile for added material, or the removal profile for a revolved cut.
4. Revolve the profile around the axis, usually 360 degrees.
5. Validate that the result is one solid and all intended circular features are coaxial.
6. Add later holes, flats, slots, patterns, chamfers, and fillets as separate features.

Common failures

• Revolving around the wrong edge or temporary line.
• Letting the sketch cross the axis and causing invalid geometry.
• Making several extruded cylinders instead of a single coherent turned profile.
• Using revolve for non-axisymmetric bracket or plate features.

Evidence summary

• Latest run evidence: 81 accepted atomic insights matched revolve, revolved profile, or revolved cut operations.
• Strong repeated names include revolve_profile, create_revolved_cut, revolve_profile_around_axis, and revolved_cut_for_internal_thread.
• Frequent operations in the latest run: Revolution, RevCut, Sketch, Cut, Chamfer, Fillet.
• Source model examples: 009934, 010137, 015133, 026624, 053895, 079633, 086237, 094412, 139073, 146478, 161210, 162241, 222550, 238044.
• Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.

Retrieval metadata

Triggers:

• revolve profile
• revolve around axis
• revolved cut
• axisymmetric profile

Secondary triggers:

• shaft shoulder
• turned groove
• bushing
• washer
• nut blank
• stepped diameter

Operation triggers:

• draw construction axis
• revolve 360 degrees
• revolved cut
• sketch half profile

Exclusions:

• plain extruded cylinder
• rectangular plate
• bracket wall
• loft