Achieve maximum concentricity, high clamping forces, and streamlined tool clearance with Shrink-Fit Chucks MAS-BT Tool Holders. Engineered for high-speed CNC milling, drilling, and fine-finishing operations on machines utilizing MAS 403 / JIS B 6339 (BT) steep taper spindles, these thermal expansion chucks grip solid carbide and HSS tool shanks through controlled induction heating and cooling. The seamless, slim-contour monoblock design provides exceptional rotational balance, minimal radial runout, and superior rigidity in tight machining cavities.
