Our 3-Jaw Self Centering Chucks are available in two sizes, 2.5″ and 3.1″. They are available with 3/4-16 threads for use on Sherline machines. The smaller 2.5″ chucks are available with other spindle threads to fit machines made by other manufacturers, such as 12 mm x 1 mm and 14 mm x 1 mm for older Unimat lathes, or 1/2-20 for old 6″ Sears lathes.
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If you prefer jaws with a looser fit for faster operation (where maximum accuracy isn’t critical), add a note requesting “loose jaws” below.
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Soft steel jaws (unhardened and unmachined) are also available when building your own chuck.
- Ductile plating with columnar structure
- Harder than any other nickel-based coating
- Coating uniformity that eliminates post-plate grinding (or burnishing)
- Wear properties overall superior to hard chromium
- Hardness (68-72 Rc)
- Low coefficient of friction (.044) Teflon™ is .04
- Uniform coating thickness up to .004”
- Accepts dry film lubricants
- 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). Add the note “loose jaws” to the comments box below
- Soft (not hardened or machined) steel jaws are also available when you build your own chuck.
-
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|
- Ductile plating with columnar structure
- Harder than any other nickel-based coating
- Coating uniformity that eliminates post-plate grinding (or burnishing)
- Wear properties overall superior to hard chromium
- Hardness (68-72 Rc)
- Low coefficient of friction (.044) Teflon™ is .04
- Uniform coating thickness up to .004”
- Accepts dry film lubricants
- 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). Add the note “loose jaws” to the comments box below
- Soft (not hardened or machined) steel jaws are also available when you build your own chuck.
- 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). Add the note “loose jaws” to the comments box below
- Soft (not hardened or machined) steel jaws are also available when you build your own chuck.
- 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). Add the note “loose jaws” to the comments box below
- Soft (not hardened or machined) steel jaws are also available when you build your own chuck
Build Your Own Chuck
3-Jaw Self-Centering chucks 4-Jaw Self-Centering chucks 4-Jaw Independent chucks Various chuck jaws
Lead time for custom-built chucks is 4-5 business days.
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
2.5″ 3-Jaw Chuck – Electroless Nickel Coated
This chuck is identical to P/N 1041 except for an electroless Nickel coating that has been applied to help prevent wear and corrosion. This special coating has been applied to all external and internal surfaces of the chuck (except for chuck jaws), significantly improving the life of the chuck. This chuck also opens and closes more smoothly due to the lubrication properties of Nickel-Teflon.
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 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.
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
3.1″ 3-Jaw Chuck – Electroless Nickel Coated
This chuck is identical to P/N 1040 except for an electroless Nickel coating that has been applied to help prevent wear and corrosion. This special coating has been applied to all external and internal surfaces of the chuck (except for chuck jaws), significantly improving the life of the chuck. This chuck also opens and closes more smoothly due to the lubrication properties of Nickel-Teflon.
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.
3.1″ ER-16 3-Jaw Chuck
For use on the ER-16 headstock only Not for use on the standard headstock that comes on all Sherline Machines
Sherline offers their 3.1" three-jaw and four-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.
Self-centering chucks offer a quick and convenient way to hold a workpiece while it is turned on the lathe. A chuck can also be clamped to a mill table to hold a part for milling. Sherline manufactures our own chucks to a high degree of precision on CNC machines. The jaws are ground and fitted to each chuck by skilled technicians to assure maximum accuracy. Runout is specified to be .003" or less at the chuck jaws.
NOTE: The chuck should not be used in applications where spindle speed exceeds 3000 RPM. If purchasing any of these chucks for use on a non-Sherline ER-16 spindle, confirm that the spindle nose thread is 22 x 1.5 mm before purchasing. The Sherline chuck has a collar that is machined flat at the back to seat against the face of the Sherline ER-16 spindle. This may not be compatible with some non-Sherline ER-16 collet adapters or industrial tool holders. Runout accuracy cannot be guaranteed unless used with a Sherline spindle.
Jaw Options
3.1″ 3-Jaw Wood Lathe Chuck
This chuck is identical to our P/N 1040 self-centering chuck except that it has a 1"-8 TPI thread that accommodates most wood-working lathes. Because this chuck was initially designed for machine-lathe work, its accuracy far exceeds what is necessary for general wood turning. It has a clamping range of 3/32" (2 mm) up to 1-3/16" (30 mm) diameter with the jaws in the normal position. With the jaws in the reversed position, work up to 2-1/4" (56 mm) can be gripped. The hole through the chuck is .687" (17 mm). Rotating the knurled ring closes all three jaws simultaneously to quickly grip round or hexagonal stock. Tommy bars (provided) are used in the holes in the side to tighten and loosen the chuck for more leverage.
Jaw Options