Hardinge Workholding 

Over 150,000 products, including collets, collet chucks, power chucks, step chucks, tool holders, rotary indexing products & custom manufacturing.  Made in the USA.

 https://www.hardinge.com/workholding/

Hardinge is the world's largest manufacturer of spindle tooling.

Our inventory of collets, feed fingers and other workholding devices is unsurpassed. Hardinge has--in stock--an incredibly wide variety of styles, sizes, and shapes to meet the requirements for your workholding application needs. Whether you require spindle tooling for automatic screw machines, lathes, mills, grinders, or fixtures, we are the workholding experts with the highest standards in the industry.

Hardinge collets are noted for having the best TIR (total indicator reading) in the industry. They last longer than other collets because they are the hardest collets manufactured to 62 Rockwell C standards. Our world-renowned 5C and 16C collets are made from special alloy steel (the "C"stands for cataract, named for the waterfalls seen from the window of the original Hardinge factory in Chicago). Collets are heat treated and spring tempered to ensure accuracy and longer life at a low cost.

Step up to Hardinge for your collets, chucks and other workholding requirements.