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Always wear safety glasses when operating machine tools. |
Download PDF 1040 Instructions
Back to 3-Jaw Self Centering Chucks
2.5″ 3-Jaw Chucks – Various Thread
Sherline 3-jaw chucks are designed with synchronized jaws that move together to automatically center round or hex stock to within a few thousandths of an inch. They offer the fastest and most convenient way to hold work in a lathe, making them one of Sherline’s most popular accessories.
These chucks can grip externally on bar stock or internally on tubing. The jaws are reversible to handle a wider range of part sizes.
Compatibility with Sherline and Other Lathes
Chucks are available with different spindle threads for use on Sherline lathes (3/4-16) and other machines such as older Unimat models (12mm x 1mm or 14mm x 1mm) or Sears 6″ lathes (1/2-20).
Note: Thread sizes other than 3/4″ x 16 are custom made and require 5–7 business days.
Jaw Options
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If you prefer jaws with a looser fit for faster operation (where maximum accuracy isn’t critical), add a note requesting “loose jaws” below.
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Soft steel jaws (unhardened and unmachined) are also available when building your own chuck.
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| Chuck Diameter | 2.5″ |
|---|---|
| Jaw Capacity | With jaws in normal position: 3/32″ (2mm) – 1-3/16″ (30mm)
With jaws in reverse position: 1/4″ (6mm) – 2-1/4″ (56mm) |
| Through Hole Diameter | .687″ (17mm) |
| Thread Size | P/N 1041 – 3/4-16 (Sherline) P/N 1068 – 12mm x 1mm (Unimat SL 1000) P/N 1070 – 1/2-20 (Old Sears 6″ Lathes) P/N 1031 – 14mm x 1mm (Unimat 3 or Cowells) |
| Chuck Body Material | 12L14 Steel |
| Chuck Jaws Material | 12L14 Case Hardened Steel |
| I.D. Holding diameter of jaws NOTE: The diameters shown on the print can vary as much as .010-.020 depending on the amount of material that is removed during the grinding operation. Click on the image for a larger view. |
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| Part No. | Description | Quantity |
|---|---|---|
| 10411 10681 10701 10311 |
2.5″ 3 Jaw Chuck Body 3/4-16 Thread *Not sold separately 2.5″ 3 Jaw Chuck Body 12mm x 1mm Thread *Not sold separately 2.5″ 3 Jaw Chuck Body 1/2-20 Thread *Not sold separately 2.5″ 3 Jaw Chuck Body 14mm x 1mm Thread *Not sold separately |
1 |
| 10412 | 2.5″ Chuck Scroll *Not sold separately | 1 |
| 10413 | Chuck Retainer Ring | 1 |
| 10414 | 3 Jaw Chuck Jaw* | 3 |
| 40580 | Tommy Bar | 2 |
*Because chuck jaws are factory ground to precisely match each chuck body you must send your chuck back to us to be fitted with new jaws. Please contact us for instructions on how to return your chuck.
Click the P/N below to download a zipped version of the IGS 3D CAD file. You will need to extract the zip file before viewing the IGS file.
1041 2.5″ 3-Jaw Chuck, 3/4-16 thread 3D IGS model
1031 2.5″ 3-Jaw Chuck, 14 mm x 1 mm thread 3D IGS model
1068 2.5″ 3-Jaw Chuck, 12 mm x 1 mm thread 3D IGS model
1070 2.5″ 3-Jaw Chuck, 1/2-20 thread 3D IGS model
You need an IGS viewer to view .igs files. CLICK HERE to download a FREE IGS viewer.
Related products
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Build Your Own Chuck
You can custom-build your own 3 or 4-jaw chuck. Choose from 2.5" or 3.1" body size and a variety of jaw options. For more information and technical specifications of the chucks or jaws themselves, please see their individual pages below
3-Jaw Self-Centering chucks 4-Jaw Self-Centering chucks 4-Jaw Independent chucks Various chuck jaws
Lead time for custom-built chucks is 4-5 business days.
2.5″ 4-Jaw Chucks – Various Thread
Includes 2 tommy bars, not pictured