Secure straight-shank cutting tools under heavy cutting loads with Side Lock Arbors (Weldon) MAS-BT Tool Holders. Engineered for CNC milling machines and machining centers equipped with MAS 403 / JIS B 6339 (BT) taper spindles, these tool holders feature a side clamping screw that locks directly onto the Weldon flat of the tool shank. Crafted from case-hardened alloy steel with precision-ground taper tolerances, they prevent tool slippage and axial pull-out during heavy-duty milling, slotting, and roughing operations.
