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wheel/models/fan120_2020_mount_v1/geometry_check.txt

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Frame solid=1 volume=34724.297 mm3 mesh watertight=True triangles=6336
Rail centers X=[-50.6200576850888, 50.6200576850888] rail top Z=20.000
Fan envelope 120x120x25 mm, fan holes 105x105 mm, diameter 4.5 mm.
Fan lower face Z=34.0 mm; bracket top Z=34.0 mm; 10 mm gap under cross ring.
Fan-frame basic opening 96x96 mm with local supports; M5 extrusion slots at y +/-30 mm, transverse travel 10 mm.
Nominal clearance from encoder screw heads to fan bottom is 16.90 mm.
Positive-volume collisions of frame/fan envelope against previous modeled objects:
none
Fan is only a simplified envelope, no real fan structure, grille, leads or cable clearance included.
Motor housing is simplified; airflow and real installation are not validated.