Jacobs Drill Chuck No 3B - Precision Drilling Tool

Jacobs Drill Chuck No 3B USED Brand: Jacobs Tool: Drill Chuck Model: No 3B Capacity: 1/8" to 5/8" (3 mm to 16 mm) Mount Type: Threaded mount (commonly 5/8"-16 UNF for the standard 3B 5/8 model, with variant options like 1/2"-20) Key Type: Uses Jacobs K3 chuck key – NOT INCLUDED Bearing Type: Plain bearing Accuracy: Center-ground jaws for alignment and straightness with a maximum T.I.R. of 0.004" at half capacity Build: Fluted/one-piece sleeve design with through-hardened sleeve teeth and hardened nose and keyholes for wear resistance Other Notes: Arbor is tapered: Large end measured at .62, small end - .59 Arbor is 3-1/8" long Drill Chuck moves/rotates just fine without the chuck. Jacobs Drill Chuck No 3B USED Brand: Jacobs Tool: Drill Chuck Model: No 3B Capacity: 1/8" to 5/8" (3 mm to 16 mm) Mount Type: Threaded mount (commonly 5/8"-16 UNF for the standard 3B 5/8 model, with variant options like 1/2"-20) Key Type: Uses Jacobs K3 chuck key – NOT INCLUDED Bearing Type: Plain bearing Accuracy: Center-ground jaws for alignment and straightness with a maximum T.I.R. of 0.004" at half capacity Build: Fluted/one-piece sleeve design with through-hardened sleeve teeth and hardened nose and keyholes for wear resistance Other Notes: Arbor is tapered: Large end measured at .62, small end - .59 Arbor is 3-1/8" long Drill Chuck moves/rotates just fine without the chuck.