GS CAT40 5/8" x 4.00" 20K RPM CNC DIN Coolant Thru. Flange End Mill Holder-.0002" TIR

1 Pc. GS Tooling Brand New CAT 40 5/8" x 4.00" 20K RPM Balanced CNC End Mill Holder - DIN Coolant Through FlangeFeaturesDIN coolant thru the flange Shank traverse ground to obtain optimum accuracy100 % forged constructionMeets or exceeds ANSI specifications.0002" or better ensures the best possible cutting tool lifeFactory 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.