Hydraulic Toolholders Require No Sleeves

Schunk has modified its Tendo hydraulic toolholders to be able to clamp different types of cutting tools with cylindrical shanks directly in the toolholder without using intermediate sleeves. This makes this toolholder even more universal during its application of various tasks. Torque transmission capacity has also been increased by as much as 15 percent.

Related Suppliers

Schunk has modified its Tendo hydraulic toolholders to be able to clamp different types of cutting tools with cylindrical shanks directly in the toolholder without using intermediate sleeves. This makes this toolholder even more universal during its application of various tasks. Torque transmission capacity has also been increased by as much as 15 percent.

The clamping of the cutting tool is done by a steel sleeve surrounded by a hydraulic fluid. When initializing the clamping process, an internal piston forces the hydraulic fluid into a cavity surrounding the steel sleeve. The high pressure uniformly forces the sleeve around any cutting tool shank.

Cutting tools with different shanks are held with concentricity of less than 0.002 mm. The clamping pressure displaces oil or grease into the Tendo groove in the clamping bore. Clamping areas remain dry, and high torque transmission is guaranteed at all spindle speeds, the company says. The hydraulic system also absorbs vibrations inherent in the cutting or grinding processes. The results are high TIR accuracy and repeatability less than 3 microns, tool life extended as much as four times and greatly improved surface quality of machined parts, according to the company.