Outstanding Hardness: Crafted from premium HT300 cast iron, this lathe chuck features jaws with a hardness of ≥53 HRC and a scroll plate hardness of ≥45 HRC. Quench-hardened for enhanced durability, it ensures excellent hardness and rust resistance, ensuring a long-lasting service life Self-Centering Function: The built-in self-centering feature allows for hassle-free use without repeated calibration. It ensures precise control over clamping accuracy, maintaining the stability and high precision of the lathe chuck for flawless performance 8-Inch 3-Jaw Lathe Chuck: Featuring a 2 1/4 in-8 threaded adapter backing plate, this lathe chuck achieves a faster and more stable connection to your machine. With a 2.56 in (65 mm) inner diameter and 8 in (200 mm) outer diameter, it clamps workpieces ranging from 0.16-7.87 in (4-200 mm), making it versatile for a variety of sizes Hassle-Free Operation: Featuring a simple, compact design, this lathe chuck balances functionality and reliability. Equipped with a T-shaped tool, installation of our lathe chuck is a breeze. Just follow the correct sequence for a seamless setup Ideal for Most Lathes: Whether you're working with metal, drilling, or milling, our lathe chuck will enhance your machining efficiency and flexibility. It helps you achieve precise and consistent results every time UPC 197988513643 Capacity 2.25 Inches Lock Type Self Centering Brand Name VEVOR Unit Count 1.0 Count Handle Type hand-tightened Item Weight 33.07 Pounds Thread Size 2 1/4-8 UNC Manufacturer VEVOR Model Number K11 200A（ 2-1/4-8） Item Diameter 8 Inches Material Type Alloy Steel Item Type Name 8 Inch (200 mm), Self-Centering Chuck with 2 1/4 in-8 Threaded Backing Plate, 0.16-7.87 in (4-200 mm) Clamping Range with T-wrench Screws, HT300 Material, for Wood Metal Lathe Compatible Devices Lathe Included Components 1 x Lathe Chuck 1 x T-Wrench Manufacturer Part Number 2 1/4 in-8 Threaded Backing Plate