Industrial 10B-1527 External Turning Tool Holder

The UNKNOWN 10B-1527 External Turning Tool Holder is a hardened alloy steel, mechanical-clamping tool holder designed for external turning and facing on CNC lathes and manual lathes. It mounts on turret or tool-post fixtures and can hold indexable inserts or brazed tools depending on configuration, enabling precise tool positioning to maintain dimensional accuracy and surface finish in metalworking operations. Typically identified by markings 10B-1527, 10B1527, CTS 2, and 1570525 for service or replacement, it serves as a legacy OEM replacement component in turning centers and engine lathes in industrial machine shops. Common replacements and compatible equivalents from Kennametal, Sandvik Coromant, and Seco Tools are used in similar legacy setups.