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1040 3-Jaw Self-Centering Chuck (3.1″)

$147.00

3.1″ dia. 3-Jaw Self-Centering Chuck (includes 2 tommy bars, not pictured).

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SKU: 1040 Categories: ,

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.

Other Purchasing Options:

1040C Electroless Nickel-Boron Coated 3-Jaw Chuck (3.1″)
1076 4-Jaw Self-Centering Chuck (3.1″)
1076C Electroless Nickel-Boron Coated 4-Jaw Chuck (3.1″)
4058 Spindle Bar Grips
Interchangeable Chuck Top Jaws

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The improper use of machine tools and their accessories can result in serious injury. Before using this tool, thoroughly read the instructions and make sure you understand its proper and safe use.

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Always wear safety glasses when operating machine tools.


Download PDF Instructions

Instructions PDF Download

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.