Manual 3-Jaw Scroll Chuck features 20 in. diameter.

Press Release Summary:

Designed with forged steel body to provide precision gripping, 20 in. self-centering ATSC Scroll Chuck meets demand for larger chucking options. Ajust-Tru™ design, with integral clearance between chuck body and mounting adapter, allows use of adjusting screws for fine-tuning concentricity of chuck to machine tool's spindle, providing ±.0005 in. TIR repeatability. To optimize performance, scroll plate, jaws, and pinions are hardened and ground.

Original Press Release:

Buck Releases New 3-Jaw 20" Ajust-Tru(TM) Scroll Chuck

Buck Chuck Company (, a subsidiary of Forkardt, announces the release of their new 20” ATSC scroll chuck to meet the demand for larger chucking options.This manual, self-centering scroll chuck is designed with a high-quality forged steel body construction to provide precision gripping, suitable for high-production runs. The Ajust-Tru design, with integral clearance between the chuck body and the mounting adapter, allows for the use of adjusting screws forfine-tuning the concentricity of the chuck to the machine tool’s spindle, providing ±.0005” TIR repeatability. To further optimize performance, the scroll plate, jaws and pinions are hardened and ground for precision and long wear.

The family of Buck ATSC manual scroll chucks range in size from 4” to 20”diameters with through-hole sizes from 1.04” up to 7.48”.  Additionally, most chuck sizes are available in model variations with either 3-jaw or 6-jaw designs. The new 20” ATSC chuck is a 3-jaw style and ships complete with master jaws and hardened, reversible top jaws for both ID and OD gripping, a spring-loaded T-wrench, an Allen wrench and mounting bolts. A variety of mounting plates are stocked for mounting the chuck to common machine spindles including American Standard styles A1, A2 and D1 camlock style. Other mounting plates can be manufactured on application.

“The level of precision and repeatability afforded by both the Ajust-Tru system and the accuracy of the ATSC operation make these manual chucks well-suited for lathe and turning center applications, as well as for holding parts in machining center applications and other processing systems requiring rotary-type fixturing,” states Michele Marotz, Inside Sales Manager at Buck Chuck Company. Buck has over 75 years of experience in the design and manufacture of chuck products. Their full product line includes manual scroll chucks, extra heavy-duty oil country chucks, power chucks and Tork-Lok arbors with ID grip collets for turning and grinding applications. For more information contact Buck Chuck Company at 800.228.BUCK, email, or visit

About Forkardt

Forkardt is a global designer and manufacturer of machine tool accessories intended to solve the most difficult workholding applications.  From first operation turning to finish grinding, Forkardt can provide advanced workholding solutions with their highly-engineered line of chucks including the original Ball Lok Chuck known as the UBL, the Equalizing Counter Centrifugal Chuck (ECC) and the Forkardt Indexing Chuck.  Forkardt is continuously innovating with the introduction of the Metric Tork Lokdesign, the Tru-Change Carrier System and the Advanced Ball Lok chuck.  Forkardt has a very diverse customer base and serves a wide variety of end-user markets by providing chucking options that range from the high-end Forkardt and N.A. Woodworth brands to the standard Buck Chuck, Logansport, and S.P. Sheffer lines.  This customer base includes metalworking manufacturers which make parts for a variety of industries, as well as a wide range of end users in the aerospace, agricultural, transportation, basic consumer goods, communications & electronics, construction, defense, energy, pharmaceutical & medical equipment and recreation industries, among others. Forkardt has manufacturing operations in the United States, Germany and France. For more information, please visit

Forkardt, 2155 Traversefield Drive, Traverse City, MI49686 USA. Phone: 800-544-3823; Fax: 231-995-8361; E-mail:

More from Fluid & Gas Flow Equipment

All Topics