GS 531-414 .039"- .511" x 4.00" Proj ER20 CAT 40 Balanced ER Collet Chuck

1 Pc. GS Tooling Brand New CAT 40 ER 20 x 4.00" 20K RPM Balanced CNC Collet Chuck - DIN Coolant Through FlangeThe ER COLLET SYSTEM is the only Clamping System with the flexibility to allow and combine drilling, reaming, milling, and tapping utilizing the same chuck, without sacrificing accuracy or rigidity.FeaturesDIN coolant thru the flange Shank traverse ground to obtain optimum accuracy Meets or exceeds ANSI specifications.0002" or better ensures the best possible cutting tool life Wrench not included Factory Balanced to save spindle life, tool life and increased productivityAT3 or better taper accuracyEach holder balanced with Hoffman MachineEach holder comes with inspection lab reportGS Tooling has developed a line of CNC tooling manufactured with a modified standard drive slot to properly equalize the weight. This change in tool design enables GS Tooling to meet tolerance machine spindles are made to. GS Tooling can run up to 20,000 RPM without putting unneeded stress on the machine spindle.