Gears and transmission
Mini Lathe with Hacksaw-Blade Parting Jig
- Bounding box
- 406.0 × 124.0 × 99.0 mm
- Engine
- Precision B-rep
- Parameters
- 20
- Published
- November 8, 2026
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The prompt
Simple 3D-printed mini lathe driven by one 24 mm DC motor through a 2:1 gear stage: 608-bearing spindle with a 3-screw bar chuck for 8 mm bar and a tailstock centre for up to 200 mm of supported length, two 8 mm aluminum bed rods, sliding carriage with a hand-fed cross slide, and a clamp jig that holds a piece of hacksaw blade on edge to part the spinning bar off
Parameters
| Name | Value | Range |
|---|---|---|
| Largest bar diameter | 8 mm | 4 – 8 |
| Supported bar length drawn (chuck face to tailstock centre, up to 200) | 200 mm | 50 – 200 |
| Spindle axis height above the base | 56 mm | 46 – 70 |
| Carriage position drawn along the bed (it slides) | -150 mm | -230 – -60 |
| Cross-slide position drawn (more negative = further from the bar) | -36 mm | -50 – -10 |
| Hacksaw blade width | 12.7 mm | 10 – 14 |
| Hacksaw blade thickness | 0.63 mm | 0.4 – 1 |
| Gear module | 1 mm | 0.8 – 1.5 |
| Motor pinion teeth | 15 | 14 – 20 |
| Spindle gear teeth | 30 | 24 – 45 |
| Gear face width | 6 mm | 5 – 10 |
| Added centre distance (backlash) | 0.2 mm | 0.1 – 0.5 |
| Motor body diameter | 24 mm | 20 – 30 |
| Motor body length | 12.5 mm | 10 – 25 |
| Motor shaft length | 9.7 mm | 8 – 14 |
| Motor pocket clearance (snug) | 0.15 mm | 0 – 0.5 |
| 608 pocket clearance (diametral) | 0.2 mm | 0.05 – 0.4 |
| Bore clearance on 8 mm rod parts | 0.2 mm | 0.1 – 0.4 |
| Hole for M3 heat-set insert | 4.2 mm | 3.8 – 4.6 |
| M3 clearance hole | 3.5 mm | 3.2 – 3.8 |
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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