Collet-to-Thread Chuck Adapters

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2.5″ 3-Jaw Chucks – Various Thread
Sherline 3-jaw chucks are designed with synchronized jaws that move together to automatically center round or hex stock to within a few thousandths of an inch. They offer the fastest and most convenient way to hold work in a lathe, making them one of Sherline’s most popular accessories.
These chucks can grip externally on bar stock or internally on tubing. The jaws are reversible to handle a wider range of part sizes.
Compatibility with Sherline and Other Lathes
Chucks are available with different spindle threads for use on Sherline lathes (3/4-16) and other machines such as older Unimat models (12mm x 1mm or 14mm x 1mm) or Sears 6" lathes (1/2-20).
Note: Thread sizes other than 3/4″ x 16 are custom made and require 5–7 business days.
Jaw Options
• If you prefer jaws with a looser fit for faster operation (where maximum accuracy isn’t critical), add a note requesting “loose jaws” below.

• Soft steel jaws (unhardened and unmachined) are also available when building your own chuck.
$132.73 – $159.28Price range: $132.73 through $159.28 Read more


3.1″ 3-Jaw 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 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 3-1/4" (82.5mm) can be gripped. The hole through the chuck is .687" (17 mm). Rotating the knurled ring closes all three jaws simultaneously to grip round or hexagonal stock quickly. Tommy bars (provided) are used in the side holes to tighten and loosen the chuck for more leverage. The chuck has a 3/4-16 thread to fit Sherline's spindle.
Jaw Options
• If you prefer jaws with a looser fit for faster operation (where maximum accuracy isn’t critical), add a note requesting “loose jaws” below.

• Soft steel jaws (unhardened and unmachined) are also available when building your own chuck| 
 
$185.83 Read more
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3.1″ 4-Jaw Chuck with Pie Jaws
Includes a steel dowel pin, hex key, and 2 tommy bars, not pictured.
This chuck features a Electroless Nickel coated chuck body for durability and rust resistance.
Included with the chuck and jaws:
• 1 1/4" x 1" steel dowel pin that is used to adjust the jaws during installation and to chuck up on while boring and turning the jaws
• 1 1/8" hex key for tightening the 4-40 x 3/8" jaw mounting screws
• 2 spindle or "Tommy" bars for loosening and tightening the chuck
Because the jaws are meant to be bored to size for particular jobs, eventually they will need to be replaced. The replacement set P/N 1143-4P can be installed on your existing 1076C Electroless Nickel coated chuck body and master jaws. They are NOT intended for use on the standard 1076 chuck body.
NOTE: These jaws are designed to be used ONLY on our Electroless Nickel coated chuck P/N 1076C, and master jaws are custom fitted to each body, so master jaws (11445-P) are not available for purchase separately.
Why pie-shaped jaws?
First developed by watch and clock makers, chucks with pie-shaped jaws offer two main advantages. Boring the unhardened jaws to hold a particular diameter part means that instead of gripping the part at only three or four tiny contact points, they grip the part all the way around its diameter. This increased gripping area allows for much less clamping pressure and less chance of deforming a gear or other delicate part held in the chuck. In addition, because the face is bored to an exact and consistent depth, placing additional parts in the chuck for turning or milling means each part surface is held at exactly the same depth as the previous parts, saving setup time.
Use on ornamental turning lathes
We decided to make pie jaws for our four-jaw self-centering chuck after a request by David Lindow, the owner of Lindow Machine Works, Maker of Modern Rose Engine Lathes, (https://lindowmachineworks.com/lindow-rose-engine-menu/). Ornamental turners need a chuck that can firmly grip wooden stock without damaging the surface. In addition to David’s request, we had also received several requests from our horological customers who were looking for a chuck similar to the Swiss-made watchmaker's scroll chuck. We designed our pie jaws in both form and function after the Swiss chucks.
How to Distinguish between Standard Chucks and Coated Chucks
Some of our customers have been wondering how to tell the difference between our standard chucks and those that have the Electroless Nickel coating. Standard chucks have darker markings than the coated chucks (See Figure 1. Click on photo to view a larger image).
[caption id="attachment_4231" align="aligncenter" width="300"] Figure 1—Examples: (Left) 1040 3-Jaw Chuck (3.1″), (Right) 1040C Electroless Nickel Coated 3-Jaw Chuck (3.1″).[/caption]
Here, at Sherline Products, each of our chucks is laser engraved with a company mark, chuck size, and jaw location. During the laser marking process the laser removes a bit of the surface and darkens the material below (Figure 1, left). When chucks are sent out to receive the Nickel-Teflon finish the coating process changes the dark engraved markings to a noticeably lighter finish (Figure 1, right).
There is also a subtle change in the color of the chuck, but in the absence of being able to compare them side by side, the most evident way to tell whether you have a coated chuck, or not, is to check the color of the laser markings.
 
$410.26 Original price was: $410.26.$307.70Current price is: $307.70. Read more


3/8″ Drill Chuck with Two Arbors
This chuck includes a #0 Morse arbor for use in the tailstock for center drilling and a #1 Morse arbor for use in the headstock. It will hold drills from 3/32" (2.4 mm) to 3/8" (9.5 mm) in diameter.  Runout is .003" or less. If runout of less than this amount is required, collets should be used to hold the drill rather than a chuck.
NOTE: Because of its longer length and ability to hold longer 3/8" drills, this chuck is normally recommended for use on the longer 4400-series benchtop lathes.
 
$86.28 Read more