The Jacobs NMTB 40 milling chuck has a clamping range of up to 20-mm in Diameter with 62.5-mm projection and 5/8-Inch in W11 thread. It is prebalanced at 10,000 RPM. Made of high alloy steel that is properly hardened and heat treated the Jacobs NMTB 40 milling chuck has both greater durability and a longer life. The Jacobs NMTB 40 milling chuck is extremely precise and accurate with a concentricity of TIR <= .0002-Inch at 4-Inch from the nose. The unique bearing system of the Jacobs NMTB 40 milling chuck provides a superior grip. The Jacobs NMTB 40 milling chuck is used for Heavy-duty milling and is suitable for CNC machines and machining centers with automatic tool changers. Through spindle coolant is standard for Jacobs milling chucks which have all been laboratory certified for both accuracy and gripping torque. All milling chucks include a one year factory warranty 

AllJacobs Chuck Tool Holders are new and factory sealed.  Each tool ships in the reusable protective tool holder capsule for storing when not in use.

 

Accessories and Tightening Wrench not included, unless otherwise stated. Can Be Purchased