• RPM: up to 10,000
• High torque: unique bearing system provides superior grip
• Rigidity: High alloy steel properly hardened and heat treated provides greater durability and longer life
• High Precision/Accuracy: concentricity TIR <= .0002-Inch at 4-Inch from the nose
• Laboratory certified for accuracy and gripping torque

From the Manufacturer

The Jacobs Straight Collet 1-1/4-Inch milling chuck with 12-mm Diameter and 70-mm projection is prebalanced at 10,000 RPM. Made of high alloy steel that is properly hardened and heat treated the Jacobs straight collet milling chuck has both greater durability and a longer life. The Jacobs straight collet 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 straight collet milling chuck provides a superior grip. The Jacobs straight collet 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.