Mechanical parts
Spin-Only Lathe for 1-3 mm Bar (all 3 mm rod and 683 bearings)
- Bounding box
- 296.0 × 101.0 × 94.0 mm
- Engine
- Precision B-rep
- Parameters
- 20
- Published
- November 8, 2026
Download
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The prompt
Spin-only 1-3 mm bar lathe rebuilt entirely around 3 mm aluminum rod and 683 bearings instead of 8 mm rod and 608 bearings: 3 mm spindle on stacked 683 bearings, two 3 mm bed rods, 683 rollers on 3 mm pins in the two roller rests, 683 bearing tailstock, slit collet sleeve chuck, 10 mm scale marking ledge; the whole machine is smaller and lighter
Parameters
| Name | Value | Range |
|---|---|---|
| Bar diameter (1 to 3 mm): sets the chuck sleeve bore and the slip-on adapter sleeves | 2 mm | 1 – 3 |
| Supported bar length drawn (chuck face to tailstock bearing, up to 200) | 200 mm | 50 – 200 |
| Spindle axis height above the base | 56 mm | 46 – 70 |
| First roller rest, distance from the chuck face (it slides) | 65 mm | 30 – 190 |
| Second roller rest, distance from the chuck face (it slides) | 135 mm | 30 – 190 |
| Ledge top below the bar axis | 8 mm | 4 – 14 |
| 683 bearings stacked at each end of the spindle (1 or 2) | 2 | 1 – 2 |
| 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 |
| 683 pocket clearance (diametral) | 0.15 mm | 0.05 – 0.4 |
| Bore clearance on the 3 mm rods | 0.15 mm | 0.05 – 0.3 |
| 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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