Flanged belt pulley with narrow groove section and central bore A · A6 · a6-pulley-01

Expected

Prompt

Make a flanged belt pulley as a single solid. The pulley has three coaxial sections stacked along Z, all centered on the Z axis, with the base on the XY plane. Bottom flange: a cylinder of diameter 80mm and height 8mm (z = 0 to z = 8). Belt groove section: a cylinder of diameter 50mm and height 24mm (z = 8 to z = 32). Top flange: a cylinder of diameter 80mm and height 8mm (z = 32 to z = 40). A central through-bore of diameter 16mm runs along the Z axis through the full height (z = 0 to z = 40). The three outer sections form the stepped outer profile of the pulley when unioned together; the belt rides in the groove between the two flanges. Output a single solid.

Checks

{
  "type": "valid_solid"
}

{
  "type": "bbox",
  "min": [
    -40,
    -40,
    0
  ],
  "max": [
    40,
    40,
    40
  ],
  "tolerance_mm": 0.1
}

{
  "type": "mass_props",
  "volume_mm3": 119506.19,
  "center_of_mass": [
    0,
    0,
    20
  ],
  "tolerance_pct": 1
}

{
  "type": "hole_count",
  "diameter_mm": 16,
  "expected": 1,
  "diameter_tolerance_mm": 0.1
}

{
  "type": "hole_positions",
  "diameter_mm": 16,
  "positions": [
    [
      0,
      0,
      0
    ]
  ],
  "tolerance_mm": 0.2
}

{
  "type": "step_roundtrip",
  "tolerance_pct": 1
}

Anti-cheese

{
  "max_solid_count": 1
}

Limits

{
  "max_tokens": 50000,
  "max_wallclock_sec": 300,
  "max_tool_calls": 60
}

Recent attempts

Runs (5)

generated 2026-06-17T03:16:07.276Z · static site, regenerate with npm run build -w @mecheval/leaderboard