Jacobs Thread Mounted Chuck, Heavy Duty Description: Jacobs thread mounted chucks feature jaws center-ground for absolute straightness and alignment and a one-piece sleeve that eliminates cracks between driving teeth often found in other designs. Jacobs thread mounted chucks feature through-hardened sleeve teeth, plus hardened nose and keyholes provide outstanding wear resistance. Each chuck 100% inspected for performance and precision. T.I.R. .004” maximum at half capacity.

Technical Specifications: Chuck Size: 5/8” Model Number: 3B 1/2 Minimum Capacity: 0.125” Maximum Capacity: 0.625” Mount: 1/2”-20 Key Number: K3 Closed Length: 3.52” Open Length: 2.74” Sleeve Diameter: 2.04” UPC: 95456333512