Gears and transmission
TR8x4 Lead Screw Drive Assembly
- Bounding box
- 161 × 62.5 × 30 mm
- Engine
- 3D Printing B-rep
- Parameters
- 29
- 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 |
|---|---|---|
| Left support center X | 0 mm | 0 – 200 |
| Carriage travel | 67 mm | 20 – 150 |
| Carriage length along screw | 36 mm | 20 – 80 |
| Support thickness along screw | 12 mm | 8 – 20 |
| Support width | 42 mm | 20 – 80 |
| Support height | 30 mm | 15 – 60 |
| Bearing seat diameter | 22 mm | 10 – 40 |
| Bearing seat depth | 7.5 mm | 3 – 15 |
| M5 mounting hole spacing in Y | 32 mm | 10 – 60 |
| M5 clearance hole diameter | 5.4 mm | 4 – 6 |
| Guide rod center spacing | 28 mm | 10 – 80 |
| Guide rod axis height | 10 mm | 5 – 30 |
| Guide block length along rod | 16 mm | 10 – 30 |
| Guide block width | 24 mm | 12 – 40 |
| Guide block height | 20 mm | 10 – 40 |
| Guide rod bore diameter | 8.2 mm | 6 – 12 |
| M5 hole spacing in Y | 16 mm | 6 – 30 |
| Length along screw | 14 mm | 8 – 30 |
| Width | 24 mm | 12 – 40 |
| Height | 24 mm | 12 – 40 |
| TR8x4 nut pocket diameter | 12 mm | 8 – 20 |
| Nut pocket depth | 6 mm | 2 – 12 |
| M5 hole spacing in Y | 18 mm | 6 – 30 |
| 80T hub diameter | 30 mm | 15 – 60 |
| 80T hub length | 12 mm | 6 – 30 |
| 35T hub diameter | 22 mm | 12 – 50 |
| 35T hub length | 10 mm | 5 – 25 |
| Shaft bore diameter | 8.2 mm | 6 – 12 |
| M5 set-screw hole diameter | 4.2 mm | 3 – 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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