Milling chucks are versatile, high-accuracy toolholders with very high gripping power and very low runout. They are great for heavy milling applications, and for holding larger diameter tool shanks. The solid one-piece construction and symmetrical design of the toolholder provide high accuracy and good balance characteristics.
Milling chucks are designed to hold a single size tool shank, and then precision straight-shank reducing collets are used to hold smaller diameter tools. The straight collet design provides even clamping along the entire length of the shank, eliminating axial movement of the tool, increasing rigidity, and minimizing runout. This results in better surface finishes and longer tool life, as well has high gripping force for heavy milling.
Simple twist-lock operation and high retention force make these milling chucks ideal for general purpose operations.
NOTE: Never tighten a milling chuck without a tool in the toolholder, or clamp on a tool that is too small for the holder or collet sleeve.