Jacobs Drill Chuck, Super, Series: 18N, 1/8 to 3/4 in Capacity, Key Number: K4, Ball Bearing, 5.12 in Closed Length, 3.95 in Open Length, 4JT Mounting, 3.01 in OD

ITEM FEATURES:

• Jaws center-ground for absolute straightness and alignment
• Through-hardened sleeve teeth, plus hardened nose and keyholes provide outstanding wear resistance
• Steel chuck
• Each chuck 100% inspected for performance and precision
• One-piece sleeve eliminates crack between driving teeth often found in other designs
• Fluted sleeve standard
• T.I.R. 0.003 in maximum at half capacity
• Designed to work with a wide range of production drilling equipment, jig borers, milling machines, lathes and radials, this chuck is engineered for heavy duty, close tolerance production drilling
• Ball bearing construction maximizes gripping force and drilling accuracy
• Ball thrust bearings reduce friction and increase grip torque and overall performance