spool assembly 3d model

Basic Parameters: ``` Units: Millimeters Canister diameter: 35mm Canister height: 50mm Wall thickness: 1.2mm Spool core diameter: 20mm ``` Modeling Instructions: 1. Top Shell · Create cylinder → Diameter: 35mm, Height: 25mm · Add hollow interior → Apply wall thickness: 1.2mm · Create locking grooves → Add 4 slots, depth: 1.5mm · Edge treatment → Apply 0.5mm fillet 2. Bottom Shell · Duplicate top shell base geometry · Modify bottom structure → Add 3 reinforcement ribs (thickness: 0.8mm) · Add spool alignment post → Diameter: 8mm, Height: 3mm · Create thread interface → Apply thread modifier, pitch=2mm 3. Spool Assembly · Main shaft → Diameter: 20mm, Height: 45mm · End plates → Diameter: 28mm, Thickness: 1.5mm (one on each end) · Add film slot → Width: 2mm, Depth: 5mm · Center hole → Through hole, diameter: 6mm Assembly Requirements: · Top and bottom shells use threaded connection · Clearance between spool end plates and shell: 0.3mm · Apply 0.2mm fillet to all edges