Two-Part Spherical Enclosure (Base + Lid)

Generate a clean, high-precision two-part spherical enclosure assembly with completely smooth outer skin walls except for the horizontal channel specified below. Units: Inches/Millimeters. [OBJECT A: LOWER BASE HEMISPHERE] - Outer Dimensions: Hollow hemisphere with a 3.500-inch (88.90mm) Outer Diameter (OD) and a 3.224-inch (81.89mm) Inner Diameter (ID), ensuring a uniform 0.138-inch (3.50mm) wall thickness. - Equator Track: A horizontal band cutting around the circumference at the splitting plane, recessed exactly 0.75mm deep into the outer skin and running 5.0mm down from the rim. - Front Button Tab: On the front equator, a standing tab houses a 25.10mm circular pocket milled 1.5mm deep directly into the 0.75mm deep equator track (leaving a 1.25mm thick solid aluminum wall floor). A centered 15.10mm horizontal thru-bore penetrates straight through this 1.25mm wall to the internal cavity. There is zero material removed from the internal wall face behind this tab. - Rear Hinge Block: On the rear internal wall right at the rim face, include a solid internal 12mm thick aluminum horizontal cube featuring an 8.0mm vertical blind hole cut 10mm deep into its top face. - Bulkhead Step Lip: Machine an internal step shoulder pocket cut 0.50mm radially inward into the wall and cut exactly 1.50mm deep vertically along the Z-axis from the top rim plane. This lip must stop short of the front button tab area to preserve the front wall profile. - Floor Studs: Add four solid, vertical cylindrical floor studs extending up from the bottom internal floor, each featuring a centered, tapped M2.5 hole. The tops of these studs must terminate exactly at the horizontal plane of the 1.50mm deep internal step lip floor to pinch down a mounting plate flush with the rim face. [OBJECT B: UPPER LID HEMISPHERE] - Outer Dimensions: Matching hollow hemisphere with a 3.500-inch (88.90mm) OD, 3.224-inch (81.89mm) ID, and 0.138-inch (3.50mm) wall thickness. - Equator Track: A horizontal band cutting around the circumference, recessed 0.75mm deep into the outer skin and running 5.0mm up from the bottom rim plane. - Front Tab Cutout: A precise semi-circular cutout machined into the front rim plane to drop cleanly over the standing button tab of Object A when closed. - Rear Hinge Block: A mirrored 12mm thick solid internal rear hinge block matching Object A, with an identical 8.0mm vertical blind hole cut 10mm deep into its bottom mating face. - Catch Divots: On the internal side walls at 45 degrees and 315 degrees relative to the front, machine a spherical dimple pocket with a 45-degree lead-in ramp sitting just above the rim plane to act as a secure retention seat for a ball catch.

Parameters

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