Heavy Duty Lathe Chuck Key — 11/16' UNC, 11' Capacity, Hardened Steel Built for reliable performance, this heavy duty lathe chuck key is designed to provide a secure, repeatable engagement for tightening and loosening lathe chucks. The 11/16' UNC size and compatibility with chucks up to 11' capacity make it suitable for common engine and bench lathes. Hardened steel construction delivers long life and dependable wear resistance under frequent use. Key benefits Durable construction: Hardened steel resists wear and extends service life compared with softer keys. Secure engagement: Precisely sized 11/16' UNC interface for a firm fit that reduces slipping and rounding of the chuck teeth. Wide compatibility: Sized for chucks up to 11' capacity, making it useful across many standard lathes and workshops. Practical and safe: Reliable operation reduces the need for excessive force and helps maintain proper clamping of workpieces. Key attributes Functionality: Provides reliable torque transfer for tightening and releasing lathe chuck jaws. Compatibility: 11/16' UNC interface — intended for chucks and lathes that accept this key size and for chucks with up to an 11' capacity. Size: 11/16' UNC key size; designed for use with chucks up to 11' capacity. Material and performance: Hardened steel construction for improved wear resistance and longterm performance under conditions. Typical use cases Metal turning: Securely clamp round stock, bar work, and turned parts on an engine lathe before machining operations. Lathe setup and maintenance: a worn key or keep a ready spare for routine chuck adjustments and maintenance in a machine . Smallbatch fabrication and work: Quickly and reliably change and secure workpieces on bench lathes and similar machines up to 11' chuck capacity. Care and practices Match the 11/16' UNC key size to the chuck thread before use to ensure a proper fit. Keep the key and chuck clean of chips and heavy debris to maintain engagement and prevent damage. Periodically inspect the key for wear; hardened steel improves longevity but regular checks preserve safety and performance. This heavy duty lathe chuck key offers a straightforward, durable solution for securing chucks up to 11' capacity with an 11/16' UNC interface, providing dependable performance for workshop and professional use.