- 4-jaw self-centering lathe chuck
- 3″ (80 mm) diameter
- Includes chuck key, inside and outside jaws
- Plain back mounting
- High grade tool steel
3 inch, 4-Jaw self-centering lathe chuck for square or octagonal work.
The through bore of this chuck is 16 mm (0.63″).
The chuck can hold work up to 63 mm (2.48″) in diameter.
The radial runout of a test bar held in this chuck, when the chuck is mounted true, is 0.003″ maximum.
| Rated Capacity, Inside Jaws | 0.08″ – 0.87″ (2.0 mm – 22.0 mm) |
| Rated Capacity, Jamming Range | 0.98″ – 2.76″ (25.0 mm – 70.0 mm) |
| Rated Capacity, Outside Jaws | 0.87″ – 2.48″ (22.0 mm – 63.0 mm) |
| Runout (Max) | ≤ 0.0028″ (0.071 mm) |
| Diameter, Overall | 3.15″ (80.0 mm) |
| Registration Recess Diameter | 2.17″ (55.0 mm) |
| Registration Recess Depth | 0.14″ (3.5 mm) |
| Bolt Circle Diameter | 2.60″ (66.0 mm) |
| Center Hole Diameter | 0.63″ (16.0 mm) |
| Height | 1.97″ (50.0 mm) |
| Jaw Height Above Face | 0.63″ (16.0 mm) |
| Height with Jaws | 2.60″ (66.0 mm) |
| Number and Size of Bolts | 3 M6 |
| Chuck Key | 0.31″ (8.0 mm) |
| Max RPM | 4000 RPM |
| Chuck Designation | K12-80 |
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