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Back to 3 Jaw Self Centering Chucks
3.1″ 3-Jaw Chuck
Includes 2 tommy bars, not pictured
Product Description
This larger chuck takes up no more center-to-center space than the 2.5″ chuck, but it will hold larger work. It has a clamping range of from 3/32″ (2 mm) up to 1-1/2″ (38 mm) diameter with the jaws in the normal position. With the jaws in the reversed position, work up to 2-3/4″ (70 mm) can be gripped. The hole through the chuck is .687″ (17 mm). Rotating the knurled ring closes all three jaws simultaneously to quickly grip round or hexagonal stock. Tommy bars (provided) are used in the holes in the side to tighten and loosen the chuck for more leverage. The chuck has a 3/4-16 thread to fit Sherline’s spindle.
Jaw Options
- For those who have jobs where speed and ease of use are more important than maximum accuracy and want a chuck that is loose right from the start (No extra charge).
Add the note “loose jaws” to the “comments/shipping instructions” box when checking out. - Soft (unhardened) steel jaws are also available upon request (No extra charge).
Add the note “soft jaws” to the “comments/shipping instructions” box when checking out. - Interchangeable top jaws are also available.
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Always wear safety glasses when operating machine tools. |
Download PDF 1040 Instructions
| Chuck Diameter | 3.1″ |
|---|---|
| Jaw Capacity | With jaws in normal position: 3/32″ (2mm) – 1-1/2″ (38mm)
With jaws in reverse position: 3/32″ (2mm) – 2-3/4″ (70mm) |
| Through Hole Diameter | .687″ (17mm) |
| Thread Size | 3/4-16 |
| Chuck Body Material | 12L14 Steel |
| Chuck Jaws Material | 12L14 Case Hardened Steel |
Because chuck jaws are factory ground to precisely match each chuck body, all replacement orders must be made by phone.
Related products
2.5″ 4-Jaw Independent Chucks – Various Thread
Includes hex key, not pictured
Spindle “Tommy” Bar
Spindle “Tommy” Bars are use to aid in the operation of opening and closing scrolling chucks and in the headstock spindle to provide leverage when unthreading tooling. They have a diameter of 5/32″ and are 3-1/8″ long.
