Jacobs Ball Bearing Taper Mount Chuck Description: Jacobs ball bearing taper mount chucks feature ball bearing construction that maximizes gripping force and drilling accuracy. Jacobs chuck jaws are center-ground for straightness and alignment. One-piece sleeve eliminates crack between driving teeth often found in other designs. Jacobs ball bearing taper mount chucks feature through-hardened sleeve teeth plus hardened nose and keyholes that provide outstanding wear resistance and feature fluted sleeve standard. Each Jacobs chuck is 100% inspected for performance and precision. T.I.R. 0.003” maximum at half capacity.

Technical Specifications: Chuck Size: 3/4” Model Number: 18N Minimum Capacity: 0.125” Maximum Capacity: 0.750” Mount: 4JT Key Number: K4 Closed Length: 5.12” Open Length: 3.95” Sleeve Diameter: 3.01” UPC: 95456302334