ER collet chucksER collet chucks

we are china shandong sishui factory for er collet chucks ,we produce the er collet have four kinds .material have 45 carbon and 65 mn ,tolerance have normal good and AA and AAAA type .A collet chuck is a precision tool-holding device that uses a specialized cylindrical sleeve, or collet, to grip cutting tools or workpieces. Unlike a traditional jawed chuck that grips a tool at a few points, a collet collapses evenly around the tool's entire circumference, providing superior concentricity, grip strength, and vibration dampening.