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 accomodate 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.
Chucks for Sherline and Other Lathes
The chuck is available in several spindle threads for use on Sherline (3/4-16) and other machines such as old Unimat lathes (12mm x 1mm and 14mm x 1mm) or Sears 6″ lathes (1/2-20).
NOTE: Chucks with a thread size other than 3/4″ x 16 are made to order and have a lead time of 5-7 business days.
- Chuck Diameter - 2.5″
- Jaw Capacity -
With jaws in normal position: 3/32" (2mm) to 1-3/16" (30 mm)
With jaws in reverse position: 5/16" (8mm) to 2-1/4" (56 mm)
- Through Hole Diameter - .687″ (17mm)
- Thread Size - 3/4-16 (other thread sizes available)
- Chuck Body Material - 12L14 Steel
- Chuck Jaws Material - 12L14 Case Hardened Steel
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