*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. *Dual-Use Jaw: The chuck jaws can be used as both internal jaw and external jaw. The external jaws are capable of clamping larger-sized industrial parts. 0.16-8 in/4-200 mm clamping range provides precise clamping and securing of various industrial components. *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: K11-200 Chuck O.D: 8 in / 200 ± 5 mm Clamping Range: 0.157-3.346"/4-85 mm External Jaw Clamping Range: 2.76-8"/70-200 mm Fixed Thread: 3-M10 Bore: φ65 mm Surface Treatment: ＜Ra0.8, Oil Coated Main Material: HT300 Net Weight: 27.1 lb / 12.3 kg Product Size: φ200 x 160 mm Jaw: 3-Jaw, 20Cr, ≥53HRC Scroll: 40Cr, ≥45HRC ******************************************************************************************************* *Pakcage Content 1 x T-key 3 x Fixing Screws 1 x Hexagon Wrench 1 x User Manual