Spindle with fine balance G2.5 for 25,000 rpm with unbalance less than 1 gram, spindle concentricity error less than or equal to 3 microns, excellent for high rotational speeds, high chip volumes with large chip removal rates, external clamping angle 4.5°, without adjusting screw, suitable for extensions with variable length setting, h6 attachment for HSS and HM tool clamping, prepared with hole for insertion of memory chip DIN 69873. Available with internal coolant supply on request.