Gears and transmission
TR8x4 Lead Screw Drive System (Exploded)
- Bounding box
- 485 × 55 × 30 mm
- Engine
- 3D Printing B-rep
- Parameters
- 54
- Published
- November 1, 2026
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The prompt
Create a precision mechanical CAD assembly. The script MUST define a top-level function build(params). Design a TR8x4 lead screw drive system for a 3D filament rewinder. Include separate printable parts: 1. Left lead screw bearing support. 2. Right lead screw bearing support. 3. TR8x4 nut coupling adapter. 4. 8 mm linear guide rod support blocks (two). 5. 80-tooth gear mounting hub. 6. 35-tooth gear mounting hub. Requirements: • Lead screw axis parallel to the linear guide rods. • 67 mm carriage travel. • 8 mm guide rod interfaces. • Bearing seats for suitable commercially available bearings. • M5 mounting holes. • Compatible with previously generated 36×28×22 mm carriage and 24×24×14 mm nut holder. • Correct alignment and realistic FDM clearances. • Separate solid bodies, exportable as STL. • All dimensions in millimeters.
Parameters
| Name | Value | Range |
|---|---|---|
| Gap between exploded parts | 15 mm | 5 – 50 |
| Support block width X | 38 mm | 30 – 50 |
| Support block depth Y | 28 mm | 20 – 40 |
| Support block height Z | 30 mm | 20 – 40 |
| Bore axis height Z | 18 mm | 10 – 25 |
| 608ZZ bearing seat diameter | 22.2 mm | 20 – 24 |
| Bearing seat depth | 7.4 mm | 5 – 10 |
| Mounting hole offset Y | 9 mm | 5 – 12 |
| M5 mounting hole diameter | 5.4 mm | 4.5 – 6 |
| Lead screw clearance bore | 8.2 mm | 7.8 – 9 |
| Base flange width X | 40 mm | 30 – 50 |
| Base flange depth Y | 34 mm | 25 – 45 |
| Base flange height | 5 mm | 3 – 10 |
| Upper block width X | 32 mm | 26 – 40 |
| Upper block depth Y | 28 mm | 24 – 36 |
| Upper block height | 18 mm | 12 – 26 |
| Nut holder pocket width X | 24.3 mm | 22 – 30 |
| Nut holder pocket depth Y | 24.3 mm | 22 – 30 |
| Nut holder pocket depth Z | 14.3 mm | 10 – 20 |
| Screw clearance bore | 8.4 mm | 7.8 – 9 |
| M5 clearance hole diameter | 5.4 mm | 4.5 – 6 |
| Mounting hole offset X | 15 mm | 10 – 19 |
| Mounting hole offset Y | 11 mm | 8 – 15 |
| Block length along rod X | 26 mm | 20 – 34 |
| Block width Y | 20 mm | 16 – 28 |
| Block height Z | 20 mm | 16 – 26 |
| Rod bore diameter | 8.2 mm | 7.8 – 9 |
| Rod bore axis height Z | 10 mm | 6 – 14 |
| Clamp slit width | 1.5 mm | 1 – 2.5 |
| Clamp screw height Z | 17 mm | 13 – 19 |
| M5 clamp screw hole diameter | 5.4 mm | 4.5 – 6 |
| Mounting hole offset X | 8 mm | 4 – 11 |
| Mounting hole offset Y | 7 mm | 4 – 9 |
| M5 mounting hole diameter | 5.4 mm | 4.5 – 6 |
| Flange diameter | 55 mm | 40 – 65 |
| Flange height | 8 mm | 4 – 12 |
| Boss diameter | 30 mm | 20 – 40 |
| Boss height | 10 mm | 6 – 16 |
| Shaft bore diameter | 8.2 mm | 7.8 – 9 |
| M5 set screw hole diameter | 5.4 mm | 4.5 – 6 |
| Set screw height Z | 13 mm | 8 – 18 |
| Bolt circle diameter | 40 mm | 30 – 48 |
| Number of gear bolt holes | 6 mm | 4 – 8 |
| M5 clearance hole diameter | 5.4 mm | 4.5 – 6 |
| Flange diameter | 32 mm | 24 – 40 |
| Flange height | 8 mm | 4 – 12 |
| Boss diameter | 20 mm | 14 – 28 |
| Boss height | 6 mm | 3 – 12 |
| Shaft bore diameter | 8.2 mm | 7.8 – 9 |
| M5 set screw hole diameter | 5.4 mm | 4.5 – 6 |
| Set screw height Z | 11 mm | 6 – 14 |
| Bolt circle diameter | 20 mm | 14 – 28 |
| Number of gear bolt holes | 4 mm | 3 – 6 |
| M5 clearance hole diameter | 5.4 mm | 4.5 – 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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