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Schunk is expanding its line of hydraulic expansion toolholders with the Tendo Aviation designed for demanding applications such as those commonly performed in the aerospace industry. The toolholder combines the strength of hydraulic expansion technology with that of Weldon toolholders. This includes high runout accuracy, a balancing grade of G 2.5 at 25,000 rpm, vibration damping and fast tool change using an allen key. An integrated anti-pullout mechanism ensures orientation of the tool and form-fit clamping when using the Weldon shank. The mechanism prevents tool pullout to hold positional tolerances. This toolholder is available for HSK-A63, HSKA 100, CAT 40 and CAT 50 interfaces.

The toolholder provides maximum torque transmission at consistently high precision and process reliability, the company says, compared to conventional Weldon and heat-shrink toolholders, with which the runout accuracy decreases over time. The runout accuracy and vibration damping of the Tendo hydraulic toolholder reduces wear on the cutting edge, extends tool life and ensures smooth surfaces. The uniform load profile further promotes service life of spindle and spindle bearing.