Sherline 3.1 Inch 4-Jaw ER-16 Independent Chuck 1032


Sherline 3.1 Inch 4-Jaw ER-16 Independent Chuck 1032


Sherline 3.1 Inch 4-Jaw ER-16 Independent Chuck 1032

4-Jaw ER-16 Independent Chuck, 3.1 Inch

Now offering Sherline’s  3.1″ 4-jaw self-centering chucks with a 22 x 1.5 mm threaded hole for use on Sherline’s optional ER-16 spindle nose. They can also be used with certain other ER-16 spindles that use the 22 x 1.5mm thread for the collet nut.

These chucks have four advantages over 3-jaw chucks.

  1. Useful for holding irregularly shaped parts
  2. With the use of a dial indicator, center parts with a great deal of accuracy
  3. Useful for deliberately holding a part off-center
  4. They can clamp stock tighter


This is a valuable asset when machining cams, crankshafts and similar parts. The main disadvantage of the 4-jaw independent chuck is that the jaws must be set individually, adding considerable setup time. The jaws are reversible to accommodate larger stock.

Like the Sherline 3-jaw chucks, the 4-jaw chucks can be used to clamp either externally or internally. Although we recommend the 3-jaw chuck for standard lathe projects, the 4-jaw chuck is considered the accessory that could add the most versatility to your machine. If you feel the 4-jaw chuck would be more useful, and you have no need for the 3-jaw chuck, any lathe “A” package can be ordered with the 4-jaw chuck substituted for the 3-jaw upon request. A clamping groove allows the chuck to hold parts for milling.

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). Please email us and indicate “loose jaws” when you order.

  • Chuck Diameter: 3.1″
  • Jaw Capacity: With jaws in normal position: 3/32″ (2mm) – 1-1/2″ (38mm). With jaws in reverse position: 1/4″ (6mm) – 2-3/4″ (70mm)
  • Through Hole Diameter: .687″ (17mm)
  • Thread Size: ER-16
  • Chuck Body Material: 12L14 Steel
  • Chuck Jaws Material: 12L14 Case Hardened Steel

Additional information

Weight 1.5 lbs
Dimensions 12 × 6 × 12 in

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