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3.1" ER-16 4-jaw independent chuck

Product #: 1032
Price: $173.25

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Four-jaw chucks have jaws that adjust one at a time. They are used to hold round, square or rectangular work. Since the jaws adjust independently, it is possible to achieve perfect centering of the part with proper adjustment. This process is more time consuming than using a 3-jaw chuck, but it offers the most accuracy. Sherline’s 3.1″ 4-jaw independent chuck is now available with a 22 x 1.5 mm thread for use on ER-16 spindles..

NOTE: The chuck should not be used in applications where spindle speed exceeds 3000 RPM. If purchasing any of these chucks for use on a non-Sherline ER-16 spindle, confirm that the spindle nose thread is 22 x 1.5 mm before purchasing. The Sherline chuck has a collar that is machined flat at the back to seat against the face of the Sherline ER-16 spindle. This may not be compatible with some non-Sherline ER-16 collet adapters or industrial tool holders. Runout accuracy cannot be guaranteed unless used with a Sherline 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.


  • Chuck Diameter - 3.1″
  • Jaw Capacity -
    With jaws in normal position: 3/32″ (2mm) – 1-1/2″ (38mm)
    With jaws in reverse position: 5/16″ (8mm) – 2-3/4″ (70mm)
  • Through Hole Diameter - .687″ (17mm)
  • Thread Size - 22mm x 1.5mm
  • Chuck Body Material - 12L14 Steel
  • Chuck Jaws Material - 12L14 Case Hardened Steel

Replacement parts 

40550 - 5/32" Hex Key
Because chuck jaws are facotry ground to precisely match each chuck body, replacement jaws cannot be bought either individually or as a set. If you need to replace the jaws you can give us a call or send us a message to set up returning your chuck for installation of new jaws. 

Download PDF 1030-1032-1044 Instructions

Instructions PDF Download



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