Jacobs Thread Mounted Chuck, Medium 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: 3/8” Model Number: 41BA 1/2 Minimum Capacity: 0.040” Maximum Capacity: 0.375” Mount: 1/2”-20 Key Number: K30 Closed Length: 2.50” Open Length: 2.05” Sleeve Diameter: 1.43” UPC: 95456310902