These chucks have four advantages over 3-jaw chucks.
- They can be used to hold irregularly shaped parts.
- They can be used to center parts with a great deal of accuracy.
- 4-jaw chucks can be used to deliberately hold a part off-center.
- 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. A clamping groove allows the chuck to hold parts for milling.
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
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