ER COLLET FOR MILLING CUTTER /cylinddrical straight shank

Material:65MN
Hardness:44-48HRC

These collets assist with "a variety of machining applications including boring, milling, reaming, tapping, grinding and engraving," according the company's website. Sizes range from the ER 8 to the ER 40
Features              
Every one of our products are very suitable for precision machining, where balance, durability and accuracy are important. We ship around the world, with customers throughout Asia, Europe and the United States.
The T.I.R.  is 0.008mm /0.005mm /0.015mm for the ER collet
The AAA Grade:0.005mm
The AA Grade:0.008mm
The A Gtade:0.015mm
Ranges and Compatibility
These ER collets have 16 slot designs that enable them to have a wide clamping range. Diameters for these clamping devices range from1/32 inch to 1-5/16 inch. We offer a variety of sizes starting at ER 8 through ER 40. 

With scientific technics processing and scientific check method, the ER collet offers high precision collets when used with the Chongde's system. 

Matched Tooling System for Best Fit: ER collet, toolholder, clamping nut and spanner, all from Chongde precision machinery