Interchangeable Jaws

Certain delicate parts require gripping with softer jaw materials. Other operations require chuck jaws that do not transmit particles of rust to the part being held. To accommodate these special circumstances, Sherline now offers 2-piece chuck jaws with interchangeable top jaws made from special materials, and bottom master jaws*. In place of the standard hardened or optional unhardened (“soft”) steel 1-piece jaws, these new top jaws are .600” tall and come in soft materials like Delrin, Teflon, and Nylon, plus harder but non-rusting materials like brass and aluminum. The replaceable top jaws are fastened to the hardened steel bottom jaws with two countersunk socket head screws. They are not stepped so the customer can machine them for custom holding applications. Other materials are available by request.

*Please note that you must purchase the bottom master jaws before you can use the top jaws.

Tall Top Jaws

We also offer taller jaws with heights of 1” and 1-1/2”. The tall jaws are made of aluminum and mild steel. These taller jaws were developed for a customer who uses our lathe for custom jewelry design and can be machined to hold custom work, as seen in the photo to the right.

About Top-Jaw Custom Orders

See the Top-Jaw Custom Orders tab below to design your own chuck jaws.

NOTE: To customers who are buying these jaws for an existing chuck, please measure the width of your current chuck jaws with a pair of mics so we can grind your master jaws to match. State your current jaw width in the comments box below. For first-time buyers who are buying a new chuck with these Master jaws, your jaws will be ground to match your chuck. The prices shown are for the jaws only (new chuck is not included).

SKU: N/A Category: Chuck Jaws

Top-Jaw Custom Orders

Fields marked with an * are required

Heading

If you would like to get a custom set of top jaws made please fill out the form below to request a quote*. We will do custom machining of the top jaws for an additional charge.

Pricing reference: the jaws shown on the “customer requested dimensions” print took 1-1/2 hours to make. Our labor charge is $80.00/hour. Most custom chuck jaws will take a minimum of one hour to make.

*if you order jaws from this page, without requesting a quote, they will not be machined to your specifications

Name *

Email *

Top jaw diagram heading

Look at the diagram below. Fill in your top-jaw height and your requested dimensions for A, B, C, D, and E. The diagram is typical for jewelers. If you have different needs, please send us a print of your jaws.

Top jaw diagram

Top-Jaw height *

.600"
1.0"
1.5"

A=Jaw diameter *

B=Jaw depth *

C=Step diameter *

D=Step height *

E=Shoulder *

square
45° taper

F=Are you ordering a chuck with custom jaws, or ordering the jaws only? *

Chuck with jaws
Jaws only

Additional Information/Comments

Using the Reference Diagram for Custom Orders

Use the diagram below as a template for designing your custom jaws before filling out the form. These dimensions show the chuck jaw blank dimensions and the jaw position when the jaws are clamping a .032″ pin (the smallest pin possible).

In the customer example, we used a .330″ pin, so the .670″ diameter would clean up the entire jaw. If the jaws were closed down smaller, then the .670″ diameter would have cut into the mounting hole (see the Full-Radius Cut drawing compared to the Interrupted-Radius Cut drawing for reference).

Click this link for a downloadable, printable version of the diagram: Custom Chuck Jaws Sample Diagram