Gears and transmission
3-Jaw Self-Centering Lathe Chuck
- Bounding box
- 170.1 × 170.0 × 62.0 mm
- Engine
- Precision B-rep
- Parameters
- 35
- Published
- September 21, 2026
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The prompt
Create a detailed 3-jaw self-centering lathe chuck assembly. Model a circular cylindrical chuck body with a thick base and a raised top face. Add three identical jaws positioned exactly 120° apart around the center. Each jaw should be a stepped rectangular gripping jaw with serrated/teeth-like gripping surfaces facing inward toward the center. Add a circular scroll plate beneath the jaws with three spiral/scroll grooves that engage with the jaws. Add a central cylindrical opening and a rear drive/gear mechanism for rotating the scroll plate. Include three equally spaced jaw guide slots in the chuck body. The three jaws must be constrained to move radially inward and outward together while remaining 120° apart, representing a self-centering chuck. Make the design a clean mechanical CAD assembly with separate components for the chuck body, scroll plate, three jaws, guide slots, and drive gear. Use realistic proportions and cylindrical/rectangular mechanical geometry suitable for a functional 3-jaw lathe chuck.
Parameters
| Name | Value | Range |
|---|---|---|
| Jaw Length | 50 mm | 20 – 120 |
| Jaw Width | 20 mm | 6 – 60 |
| Jaw Height | 15 mm | 5 – 50 |
| Grip Step Length | 12 mm | 0 – 40 |
| Grip Step Height | 4 mm | 0 – 12 |
| Pin Hole Dia | 6 mm | 1 – 20 |
| Pin Hole From Rear | 8 mm | 2 – 30 |
| Gripping Radius | 24 mm | 10 – 60 |
| Number of Jaws | 3 count | 3 – 6 |
| Jaw Corner Fillet | 2 mm | 0 – 6 |
| Serration Count | 5 count | 0 – 15 |
| Serration Groove Radius | 1 mm | 0 – 4 |
| Chuck Body Dia | 170 mm | 60 – 320 |
| Base Thickness | 25 mm | 8 – 60 |
| Raised Top Face Dia | 160 mm | 50 – 300 |
| Raised Top Height | 10 mm | 2 – 30 |
| Central Opening Dia | 30 mm | 5 – 100 |
| Guide Slot Depth | 4 mm | 1 – 15 |
| Guide Slot Clearance | 1 mm | 0 – 4 |
| Guide Slot Inner Radius | 22 mm | 10 – 60 |
| Jaw Seat Embed Depth | 1 mm | 0.3 – 4 |
| Scroll Plate Dia | 120 mm | 40 – 260 |
| Scroll Plate Thickness | 12 mm | 4 – 40 |
| Scroll Plate Overlap | 2 mm | 0.5 – 10 |
| Scroll Groove Count | 3 count | 1 – 8 |
| Scroll Groove Width | 6 mm | 1 – 20 |
| Scroll Groove Depth | 3 mm | 0.5 – 12 |
| Scroll Groove Inner R | 32 mm | 5 – 120 |
| Scroll Groove Outer R | 52 mm | 10 – 140 |
| Scroll Groove Sweep | 100 deg | 10 – 340 |
| Drive Gear Module | 2 mm | 0.5 – 6 |
| Drive Gear Teeth | 16 count | 8 – 40 |
| Drive Gear Thickness | 8 mm | 2 – 25 |
| Drive Shaft Dia | 10 mm | 3 – 40 |
| Drive Gear Offset | 66 mm | 20 – 150 |
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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