Achieve high concentricity, exceptional clamping force, and versatile tool holding with ER Collet Chucks MAS-BT Tool Holders. Precision-engineered for CNC machining centers, milling machines, and drilling stations equipped with MAS 403 / JIS B 6339 (BT) taper spindles, these collet chucks securely hold drills, end mills, reamers, and taps using standard ER collets (ER16, ER25, ER32, ER40). Manufactured from high-tensile alloy steel with fine-ground taper surfaces, they ensure minimal runout, balanced high-RPM performance, and reliable accuracy across high-speed cutting operations.
