Hydraulic Toolholders

March 1, 2010

Schunk Inc. has redesigned its Tendo brand of toolholders to be able to clamp different types of cutting tools with cylindrical shanks directly in the toolholder without using intermediate sleeves.

The company has also increased torque transmission capacity by up to 15 percent.

The toolholders have a steel sleeve surrounded by hydraulic fluid that clamps the cutting tool. When the clamping process initiates, 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 0.003-mm runout. The clamping pressure displaces oil or grease into the Tendo groove in the clamping bore. The hydraulic system also absorbs vibrations inherent in the cutting or grinding process.

For more information, visit www.schunk.com.