Jerry
37 lines
1.3 KiB
Markdown
37 lines
1.3 KiB
Markdown
# 4. Stepped Shaft With Keyway
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## Prompt
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Create a single solid stepped shaft STEP model in millimeters.
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The shaft axis runs along X. The total length is 120 mm. The left end center is at X = 0, Y = 0, Z = 0.
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From X = 0 to X = 30, the shaft diameter is 20 mm. From X = 30 to X = 90, the shaft diameter is 30 mm. From X = 90 to X = 120, the shaft diameter is 20 mm.
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Add a 1 mm chamfer to both end edges.
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Add a rectangular keyway slot on the top of the 30 mm diameter middle section. The keyway is 6 mm wide in Y, 3 mm deep in Z, and runs from X = 40 to X = 80.
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Export as a STEP file.
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## Test Cases
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| Test | Expected result |
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| --- | --- |
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| STEP import | File imports successfully |
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| Solid count | Exactly one watertight solid |
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| Shaft axis | Along X, not Z |
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| Total length | 120 mm |
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| Left section | Diameter 20 mm, length 30 mm |
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| Middle section | Diameter 30 mm, length 60 mm |
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| Right section | Diameter 20 mm, length 30 mm |
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| Coaxiality | All three cylindrical sections share same X-axis |
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| End chamfers | 1 mm chamfer at both ends |
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| Keyway location | On top of middle section |
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| Keyway length | From X = 40 to X = 80 |
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| Keyway width | 6 mm in Y |
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| Keyway depth | 3 mm downward into shaft |
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| Negative check | Keyway should not pass through the shaft; shaft should not be vertical |
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