Description: 125mm 4 Jaw Self Centering Lathe Chuck with Key. Specification: Material:Hardened Steel; Max RPM:3800 r/min; Jaw:4 Jaw; High precision:≤0.05mm; Application:For CNC Drilling Milling Machine; Lathe Chuck: Diameter:125mm(4.921"); Thickness:58mm(2.283"); Center Hole:30mm(1.181"); Bolt Circle Diameter:108mm(4.252"); Runout: 0.003"; Internal Jaw: Clamping Range A-A1:2.5- 40mm(0.098"- 1.575"); Jamming Range B-B1:38- 125mm(1.496"- 4.921"); External Jaw: Clamping Range C-C1:38- 110mm(1.496"- 4.331"). Features: 1. Short cylindrical center mounting. 2. Chucks are provided with one-piece jaws(which include a set of internal jaws and a set of external ones ). 3. Chucks are supplied with traditional two-piece jaws. Function: Four-jaw synchronous movement for clamping four square, square parts, also applies to shaft type, disk parts. Applicable machine tools and accessories: General lathe, economical CNC lathes, grinding machines, milling machines, drilling and machine accessories etc. Package Included: 1 x Self-Centering Jaw; 3 x Inside jaws; 3 x outside jawslarge; 1 x safety chuck key; 3 x mounting bolts