90 lines
3.2 KiB
Markdown
90 lines
3.2 KiB
Markdown
# Through Hole Cut Atomic Skill
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## When to use
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- A part needs a clean circular hole or bore that passes fully through a plate, block, bracket wall, flange, washer, spacer, or boss.
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- The request mentions through hole, clearance hole, central hole, circular opening, bore through, or cut through all.
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## Do not use when
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- The hole is threaded, counterbored, countersunk, or a bearing seat requiring special geometry.
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- The circular feature is a blind pocket, groove, decorative recess, or non-through relief.
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- The hole is part of a patterned bolt circle; combine with the pattern skill for repeated holes.
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## Recognition features
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- Circular sketch on a planar face followed by Cut-Extrude or HoleWzd through all.
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- Cylindrical internal face runs through the full thickness.
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- Used for clearance, alignment, lightening, shaft passage, or central opening.
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## Core invariants
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- Hole axis should be normal to the face or coaxial with the main part axis.
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- Use through-all end condition when the hole must pass through the entire body.
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- Keep hole diameter and placement explicit.
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- For central holes, use the part axis or centerline as the placement reference.
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- For repeated holes, make one seed through hole and pattern it.
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## Parameter roles
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- `hole_diameter` defines opening size.
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- `placement_point` defines center on the start face.
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- `axis` defines coaxial central placement when needed.
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- `end_condition` is usually through all.
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- `face` defines the start plane.
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## Construction sequence
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1. Select the face or reference plane where the hole starts.
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2. Place a circle center from datums, centerlines, or the main axis.
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3. Sketch the circle with the required diameter.
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4. Cut through all material in the intended direction.
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5. Pattern or mirror the through-hole cut if repeated.
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6. Add hole edge chamfers only after the cut exists.
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## Common failures
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- Creating a shallow blind pocket when a through hole is required.
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- Leaving a sketch circle without cutting material.
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- Placing a central hole off-axis.
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- Treating threaded/counterbored/bearing holes as plain through holes.
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- Cutting through unintended bodies in an assembly-like model.
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## Evidence summary
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- Latest run evidence: 49 accepted atomic insights matched through-hole and circular-cut creation.
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- Strong repeated names include `create_through_hole`, `cut_circular_hole`, `cut_circle`, `cut_central_bore_through_plate`, and `create_through_holes_with_cut`.
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- Frequent operations in the latest run: Cut, HoleWzd, CircularPattern, LinearPattern, Chamfer.
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- Source model examples: 001563, 001942, 046907, 054633, 059866, 080145, 086131, 096474, 142955, 148675, 153729, 160077, 222192, 230562, 241179.
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- Source: CAD-SkillX offline review of SCAD58 descriptions, STEP summaries, and SolidWorks feature evidence.
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## Retrieval metadata
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Triggers:
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- `through hole`
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- `clearance hole`
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- `central hole`
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- `circular opening`
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- `cut through`
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- `bore through`
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Secondary triggers:
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- `shaft passage`
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- `alignment hole`
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- `lightening hole`
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- `hole through plate`
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- `hole through boss`
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Operation triggers:
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- `cut extrude through all`
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- `cut circle`
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- `hole wizard through hole`
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- `pattern through hole`
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Exclusions:
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- `threaded hole`
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- `counterbored hole`
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- `countersink`
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- `bearing seat`
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- `blind pocket`
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