Sherline 4-Jaw Independent Chucks

Four-jaw chucks are somewhat less convenient than three-jaws, but they do offer maximum in versatility and centering accuracy. They are available in both 2.5" and 3.1" diameters. (Click on photo for larger image.)

2.5" Diameter 4-Jaw Independent Chucks...

Four-jaw chucks have four advantages over three-jaw chucks. (1) They can be used to hold irregularly shaped parts. (2) With the use of a dial indicator, they can be used to center parts with a great deal of accuracy. (3) Four-jaw chucks can be used to deliberately hold 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 individually set, adding considerable time to setups.

Like the Sherline 3-jaw chucks, the 4-jaw chucks can be used to clamp either externally or internally. The 2.5" (63mm) 4-jaw chuck (P/N 1044) is designed to grip from 3/32" (2mm) up to 1-3/16" (30mm) diameter stock with the jaws in the normal position. For larger diameters, the jaws must be reversed, and can grip up to 2-1/4" (56mm). The chuck has a .687" (17mm) through hole with a 3/4-16 thread. (The 2.5" chuck is also available with 1/2-20, 12mm x 1mm and 14mm x 1mm spindle threads to fit other brand machines.)

A hex key (provided) is used to tighten each jaw individually. Tommy bars (also provided) are used in the holes in the side to tighten and loosen the chuck for more leverage. A groove is provided around the base of the chuck so that angle clamps can be used to mount it to the table of a mill as a holding fixture.

Sherline 2.5" 4-Independent Chucks

P/N	Spindle Thread	Shipping Wt.	Price
1044	3/4-16	2	$110.00
1035	14mm x 1mm	2	$120.00
1071	12mm x 1mm	2	$120.00
1073	1/2-20	2	$120.00

VIEW INSTRUCTIONS FOR USING 4-JAW CHUCKS

The larger P/N 1030 3.1" 4-jaw chuck takes maximum advantage of the size available on a standard Sherline lathe. (Click on photo for larger image.)

3.1" Diameter 4-Jaw Independent Chuck...

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). A hex key (provided) is used to tighten each jaw individually. A groove is machined around the base of the chuck so that angle clamps can be used to mount it to the table of a mill as a holding fixture. The chuck has a 3/4-16 thread to fit Sherline's spindle and other machines using that thread.

Sherline 3.1" 4-Jaw Self-centering Chucks

P/N	Spindle Thread	Shipping Wt.	Price
1030	3/4-16	2	$135.00

VIEW INSTRUCTIONS FOR USING 4-JAW CHUCKS

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Lathes can now be purchased packaged with chucks and other preselected groups of accessories. See the page on PACKAGE DEALS. Save time and money by buying a package. OPENING PAGE

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