S25S-MCLNR12 Boring Bar

The S25S-MCLNR12 is a heavy-duty internal turning boring bar designed for CNMG 1204 negative inserts. Featuring a robust 25 mm shank diameter and a 95° approach angle, this holder provides exceptional rigidity and stability during internal turning, facing, shoulder machining, and general boring operations. Its strong clamping system ensures secure insert retention under demanding cutting conditions, making it suitable for medium and rough machining applications. The holder is compatible with double-sided CNMG inserts, providing a cost-effective solution with multiple usable cutting edges. Specifications: • Shank Diameter: 25 mm • Holder Style: MCLNR • Insert Type: CNMG 1204 • Approach Angle: 95° • Hand: Right-Hand • Minimum Bore Diameter: Approx. 32 mm • Application: Internal Turning & Boring Compatible Inserts: • CNMG 120404 • CNMG 120408 • CNMG 120412 Recommended Grades: • CNMG 120408-TM OS8235 • CNMG 120412-TM OS8225 • CNMG 120408-MM OS5105 • CNMG 120408-TM OS8126 Suitable for machining steel, stainless steel, cast iron, and other engineering materials. The larger 25 mm shank offers increased vibration resistance and improved machining stability, making this holder ideal for CNC production environments.