SCHUNK 0301555 UNJ 40 Universal Precision 3 Jaw Chuck With Hardened Jaws is a three‑jaw, precision workholding chuck from SCHUNK, featuring hardened jaws for improved wear resistance. The UNJ 40 designation places it within SCHUNK’s UNJ 40 family, and the part number is 0301555. This chuck is designed for universal precision gripping of round workpieces, delivering repeatable clamping performance in machining setups.
