Jacobs 18N C&K 1/8-3/4in JT4 Keyed Super Chuck Drill Chuck

This is a new Jacobs 18N Super Chuck keyed drill chuck, part number 0030233, with a 1/8 to 3/4 in (3–19 mm) capacity range and a JT4 (Jacobs Taper #4) tapered mount bore. The 18N designation identifies it as a heavy-duty industrial chuck in Jacobs' Super Chuck series, featuring all-steel construction with a black oxide finish and hardened steel jaws for rigidity and longevity under high-cycle production conditions. The keyed design uses a pinion-style chuck key (included) engaging the circumferential bevel gear ring visible on the chuck body, providing positive, high-torque clamping suited for drill press, lathe tailstock, and milling machine quill applications where secure grip on round-shank tooling is required. The JT4 taper mount is compatible with JT4 arbors and adapter sleeves; the chuck body itself does not include an arbor. Lot serial 241109-1-1 is stamped on the back face as visible in the photos.

Product Specifications