Gears and transmission
Gearbox Holder with 8 mm Rod Block
- Bounding box
- 102.2 × 110.0 × 72.0 mm
- Engine
- Precision B-rep
- Parameters
- 31
- Published
- November 8, 2026
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The prompt
Printed holder (cradle) for the refined teardrop gearbox: the gearbox sits in a shaped pocket with a motor cutout, held down with zip ties, and a rod block underneath takes 8 mm threaded rod in a vertical hole and a horizontal hole, each captured by M8 hex nuts
Parameters
| Name | Value | Range |
|---|---|---|
| Gear module | 1 mm | 0.8 – 2 |
| Pinion teeth | 15 | 12 – 24 |
| Reduction ratio | 4 | 2 – 6 |
| Added centre distance | 0.2 mm | 0 – 0.6 |
| Gearbox housing wall | 4 mm | 3 – 10 |
| Gearbox gear-tip clearance | 3 mm | 1.5 – 8 |
| Gearbox insert hole diameter | 4.2 mm | 3.8 – 4.6 |
| Gearbox ear blend radius | 3 mm | 1 – 5 |
| Motor body diameter | 24 mm | 12 – 36 |
| Gearbox motor pocket clearance | 0.15 mm | 0 – 0.6 |
| Clearance around the gearbox (per side) | 0.5 mm | 0.2 – 1.5 |
| Cradle wall thickness | 5 mm | 3 – 10 |
| Cradle floor thickness | 5 mm | 3 – 10 |
| Wall height above the floor | 12 mm | 6 – 22 |
| Motor cutout oversize (diameter) | 3 mm | 1 – 10 |
| Outer edge rounding | 1.5 mm | 0.5 – 3 |
| First zip tie position (along gearbox) | 15 mm | 10 – 30 |
| Second zip tie position (along gearbox) | 26 mm | 10 – 30 |
| Tab width | 9 mm | 7 – 14 |
| Tab length (outward) | 10 mm | 8 – 16 |
| Slot width (tie width + play) | 4.4 mm | 3 – 6 |
| Slot height (tie thickness + play) | 2.4 mm | 1.6 – 3.5 |
| Threaded rod diameter | 8 mm | 6 – 10 |
| Rod hole oversize (diameter) | 0.6 mm | 0.2 – 1 |
| Nut across flats (M8 = 13) | 13 mm | 10 – 17 |
| Nut thickness (M8 = 6.5) | 6.5 mm | 5 – 9 |
| Nut pocket oversize | 0.4 mm | 0.2 – 1 |
| Rod block height | 30 mm | 24 – 40 |
| Rod block depth (along the horizontal rod) | 30 mm | 26 – 40 |
| Rod hole offset from block centre | 10 mm | 9 – 14 |
| Rod block position along the gearbox | -10 mm | -20 – 5 |
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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