Gears and transmission
Exploded Rotary Filament Selector Gearbox
- Bounding box
- 839.8 × 50.0 × 77.5 mm
- Engine
- Precision B-rep
- Parameters
- 56
- Published
- September 19, 2026
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The prompt
Generate a highly detailed, 3D mechanical CAD assembly in an EXPLODED VIEW showing a 4-color multi-material rotary filament selector powered by a 36mm round motor pinion driving an internal reduction gear train system. Do not generate placeholder solids; every gear tooth profile must be explicitly modeled. 1. GEAR TRAIN & TRANSMISSION SPECIFICATIONS: - PINION GEAR (Motor Shaft): A 10-tooth (10T) spur gear with a Module of 0.5, integrated onto the central 5mm motor D-shaft. - SELECTOR DRIVE GEAR: A large 40-tooth (40T) compound reduction spur gear (Module 0.5) that meshes directly with the 10T motor pinion to create a precise 4:1 mechanical reduction ratio for high torque indexing. - FILAMENT DRIVE GEARS (HGX-LITE Style): Inside the upper window, model a pair of synchronized, counter-rotating dual-drive filament extruder gears (Module 0.8, 12mm pitch diameter) with an integrated sharp concave helical knurled tooth profile designed to grip 1.75mm filament. 2. EXPLODED ASSEMBLY VIEW STRUCTURE: - Offset all sub-components along a central longitudinal exploded axis (Z-axis) to clearly expose the internal mechanics and gear teeth engagement. - Main Housing Base: Displaced 40mm backwards, featuring an empty internal gearbox cavity, bearing pockets for 685ZZ bearings, and a 36mm circular mounting flange. - 36mm Round Motor & 10T Pinion: Displaced 25mm along the axis, showcasing the pinion gear teeth face. - 40T Main Rotary Barrel Assembly: Displaced at the center, completely detached from the housing to show its outer 40T gear teeth profile on one side and the 4 internal 2.2mm filament channels on the other. - Dual-Drive Filament Extruder Gears: Displaced 30mm vertically upward along the Y-axis from the housing window, showcasing the mating spur gears and the concave filament path alignment. 3. GEOMETRIC CONSTRAINTS & DETAILS: - All gear profiles must follow the standard 20-degree pressure angle involute system. - Include 5mm internal shafts, washers, and micro bearings (5x11x4mm) pulled out in the exploded line to define the rotating axes.
Parameters
| Name | Value | Range |
|---|---|---|
| Exploded Layout Gap | 80 mm | 60 – 160 |
| Housing Length (X) | 70 mm | 40 – 120 |
| Housing Width (Y) | 50 mm | 30 – 100 |
| Housing Height (Z) | 45 mm | 25 – 90 |
| Cavity Length | 50 mm | 20 – 100 |
| Cavity Width | 30 mm | 15 – 70 |
| Cavity Height | 35 mm | 15 – 70 |
| Cavity Z Offset | 2 mm | -5 – 10 |
| Bearing Pocket Dia | 11 mm | 6 – 20 |
| Bearing Pocket Depth | 5 mm | 2 – 12 |
| Motor Flange Dia | 36 mm | 20 – 60 |
| Motor Flange Height | 4 mm | 1 – 15 |
| Filament Window Length | 24 mm | 10 – 50 |
| Filament Window Width | 14 mm | 6 – 40 |
| Filament Window Depth | 10 mm | 3 – 30 |
| Motor Body Dia | 36 mm | 20 – 60 |
| Motor Body Length | 36 mm | 15 – 80 |
| Motor Shaft Dia | 5 mm | 3 – 12 |
| Motor Shaft Length | 15 mm | 5 – 40 |
| D-Shaft Flat Depth | 0.6 mm | 0 – 1.5 |
| Pinion Module | 0.5 mm | 0.3 – 1.5 |
| Pinion Teeth | 10 teeth | 8 – 24 |
| Pinion Face Width | 5 mm | 2 – 15 |
| Pinion Pilot Bore | 1.5 mm | 0.5 – 3 |
| 40T Gear Module | 0.5 mm | 0.3 – 1.5 |
| 40T Gear Teeth | 40 teeth | 20 – 60 |
| 40T Gear Face Width | 8 mm | 3 – 20 |
| Rotary Barrel Dia | 30 mm | 15 – 60 |
| Rotary Barrel Length | 35 mm | 15 – 70 |
| Barrel Center Bore | 5 mm | 3 – 12 |
| Filament Channel Dia | 2.2 mm | 1.5 – 4 |
| Filament Channels | 4 channels | 2 – 8 |
| Channel Pitch Circle | 14 mm | 6 – 26 |
| Extruder Gear Module | 0.8 mm | 0.4 – 2 |
| Extruder Gear Teeth | 15 teeth | 10 – 30 |
| Extruder Gear Width | 10 mm | 4 – 20 |
| Extruder Gear Bore | 5 mm | 3 – 12 |
| Extruder Shaft Spacing | 12 mm | 6 – 30 |
| Barrel Shaft Dia | 5 mm | 3 – 12 |
| Barrel Shaft Length | 45 mm | 15 – 90 |
| Extruder Shaft Dia | 5 mm | 3 – 12 |
| Extruder Shaft Length | 25 mm | 10 – 60 |
| 685ZZ Outer Dia | 11 mm | 6 – 20 |
| 685ZZ Bore | 5 mm | 2 – 12 |
| 685ZZ Width | 5 mm | 2 – 12 |
| Micro Bearing Outer Dia | 11 mm | 6 – 20 |
| Micro Bearing Bore | 5 mm | 2 – 12 |
| Micro Bearing Width | 4 mm | 2 – 10 |
| Shim Washer OD | 9 mm | 6 – 16 |
| Shim Washer ID | 5 mm | 3 – 12 |
| Shim Washer Thickness | 0.5 mm | 0.2 – 2 |
| Shim Washer Count | 4 pcs | 1 – 8 |
| E-Clip OD | 9.5 mm | 6 – 16 |
| E-Clip ID | 5 mm | 3 – 12 |
| E-Clip Thickness | 1 mm | 0.4 – 3 |
| E-Clip Count | 2 pcs | 1 – 6 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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