Highlights:1.Superior HT300 Material: Our 3-jaw lathe chuck is constructed from HT300 material, 20Cr steel chuck jaw with 53HRC hardness, and 40Cr steel scroll with 45HRC hardness. The lathe chuck is quenching hardened for superior hardness and rust resistance, providing outstanding working performance and reliability for both small and large workpieces.2.High Precision: A high-precision machining process is adopted to ensure the structural stability and machining accuracy of the 3-jaw chuck. The self-centering lathe part contains a delicate bevel gear and three pinion gears, which help to achieve precise machining progress. Bearing tolerance is ?.05 mm / 0.002 in.3.Internal & External Jaw: The 3-jaw self-centering lathe chuck is equipped with an internal jaw and external jaw to expand its clamping range, and the external jaws are capable of clamping larger-sized industrial parts. Clamping Range: 0.14- 6.3 in/3.5-160 mm. All you need to do is rotate it using the T-key and adjust it to fit your workpiece size and shape.4.Simple & Easy Operation: The 3-jaw lathe chuck features a simple and compact structure, pursuing the best balance of function and reliability. The built-in self-centering function allows you to use it without repeated calibration. All you need to do is install it in the right order and use it with peace of mind.5.Applicable to Various Lathes: Our self-centering lathe chuck is highly adaptable to meet your usage requirements, whether you are working in metal machining, drilling, or milling. By using our lathe chuck, you can improve machining efficiency and operational flexibility, achieving accurate and consistent results.Details: 6 3-Jaw Self-Centering Lathe Chuck The 6 3-jaw lathe chuck is made of high-strength HT300 material with strong compression resistance and long service life. It features an internal and external jaw to clamp larger-sized industrial components and a self-centering function to avoid repeated calibration.The 3-jaw chuck has a self-centering function and a bevel gear to precisely control the accuracy of the clamped workpiece for precise machining. Bearing tolerance ≤ 0.05 mm / 0.002" ensures the lathe chucks structural stability and high accuracy.We provide you with two types of jaws, internal jaw, and external jaw, capable of clamping larger-sized industrial components. You can easily open and close the jaws by rotating the T-shaped key.This chuck consists of a chuck body, movable chuck, and jaw drive with a simple structure. When clamping a work part, the chuck is able to find and hold the center of the part automatically. All you need to do is install them in the correct order.Whether youre working in woodworking, metalworking, drilling, or milling, our 3-jaw self-centering lathe chuck can meet your requirements for improved machining efficiencies and increased job flexibility and precision.