SCHUNK Inc. (Morrisville, NC) has modified its bestseller TENDO to be able to clamp different types of cutting tools with cylindrical shanks directly in the toolholder without using intermediate sleeves. Torque transmission capacity has also been increased by up to 15 percent.
The benefits of the TENDO Hydraulic Toolholders remain unchanged, however. A steel sleeve surrounded by hydraulic fluid performs the clamping of the cutting tool. 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 great concentricity of less than 0.003 mm. The enormous 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 hydraulic system also absorbs vibrations inherent in the cutting or grinding processes. The results are very high T.I.R. accuracy and repeatability of less than 3 microns (0.00012 in). Tool life is extended up to four times and the surface quality of machined parts is greatly improved.
TENDO Hydraulic Toolholders offer precise toolholding solutions for almost every manufacturing process. The toolholders are suitable for high-speed and fine milling, heavy-duty milling, wood machining, HSC (high speed machining), internal grinding, boring and chamfering, precision reaming, and precision tool grinding. TENDO Hydraulic Toolholders are available with a radial length adjustment allowing micro-precise adjustment to guarantee higher process performance.
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