*KeyFeatures *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. *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 ≤0.05 mm / 0.002 in. *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. *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. *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. ******************************************************************************************************* *Specifications Item Model Number: K11-160 Chuck O.D: 6 in / 160 ± 5 mm Clamping Range: 0.138-2.36"/3.5-60 mm External Jaw Clamping Range: 2.2-6.3"/56-160 mm Fixed Thread: 3-M8 Bore: φ45 mm Surface Treatment: ＜Ra0.8, Oil Coated Main Material: HT300 Net Weight: 17.8 lb / 8.1 kg Product Size: φ160 x 140 mm Jaw: 3-Jaw, 20Cr, ≥53HRC Scroll: 40Cr, ≥45HRC ******************************************************************************************************* *Pakcage Content 1 x T-key 3 x Fixing Screws 1 x Reverse Jaws 1 x User Manual