6 Inch 3-Jaw Self-Centering Lathe Chuck with 1 1/2 in-8 Threaded Backing Plate About this item 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 6-Inch 3-Jaw Lathe Chuck: Featuring a 1 1/2 in-8 threaded adapter backing plate, this lathe chuck achieves a faster and more stable connection to your machine. With a 1.77 in (45 mm) inner diameter and 6 in (160 mm) outer diameter, it clamps workpieces ranging from 0.12-5.71 in (3-145 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. 6-Inch 3-Jaw Lathe Chuck with Backing Plate Our lathe chuck with backing plate achieves faster, steadier machine connection. Built from premium HT300 cast iron, jaw hardness ?53 HRC for exceptional durability. The self-centering design ensures high-precision clamping ranging from 0.12 in to 5.71 in with 1.77 in I.D and 6 in O.D. Key Features Stable and Reliable Engineered for high hardness and precision, this lathe chuck features a T-shaped tool for easy installation. Whether you're turning or clamping small workpieces, expect consistent, reliable performance every time. Precision Machining With a self-centering function and fine gears, our lathe chuck ensures precise control over the clamping accuracy, making it ideal for precision machining tasks. Multiple Uses Designed for both internal and external clamping, this self centering lathe chuck meets a variety of machining needs, providing you with efficient and stable clamping performance. (description exceeds maximum possible length)