SCHUNK Inc.'s TENDO-ES is a short hydraulic expansion toolholder, which allows the tool to be clamped directly in the mounting taper. This way, the tool shank is supported via the spindle. The result is high holding forces for transferable high torques and a great deal of additional space in the machining area. The TENDOS-ES L1 is 26.0mm, has a runout accuracy of less than 0.003mm, and tools can be changed in seconds with an Allen key. TENDO-ES is reportedly for rough machining, HPC/HSC, drilling, reaming, tapping, thread milling, and thread forming. Flexibility is ensured due to the use of intermediate sleeves. The TENDO-ES is now available for the SK 40 and CAT 40 interfaces. The clamping diameter is 20mm, or ¾ inches, and standard TENDO sleeves can be used to clamp smaller tool shank diameters with a balancing grade of G 2.5 at 25,000 rpm.