A shrink fit tool holder is a high performance clamping system that utilizes thermal expansion to secure cutting tools, offering superior rigidity and concentricity for high speed machining (HSM). The process involves heating the holder’s tool pocket (typically via induction) to 250 300°C, expanding its inner diameter by 0.02 0.05mm, inserting the tool shank, and allowing the holder to cool—creating a interference fit that transmits torque without mechanical fasteners. This design eliminates tool slippage even under 500 Nm torque, critical for heavy roughing of alloy steel or titanium. Shrink fit holders achieve runout ≤0.002mm, enhancing tool life and surface finish (Ra < 0.8μm) compared to ER collet systems. Constructed from alloy steel (20CrMnTi) with vacuum carburizing (case depth 0.8 1.2mm, HRC 58 62), they maintain dimensional stability through thermal cycles and resist deformation under centrifugal forces. WondersunM’s shrink fit holders integrate through coolant channels (360° directional nozzles) to direct coolant to the cutting edge, reducing temperatures by 30 50°C. They offer balanced designs (G2.5 at 25,000 RPM) for HSM and custom lengths (50 300mm) for deep cavity machining. The company provides induction heating units with temperature control (±5°C) to ensure consistent shrink fits, along with anti rotation flats for safety. Compliance with ISO 15488 and DIN 69871 ensures compatibility with standard tool shanks (3 32mm). Supported by 25+ years of expertise, WondersunM offers FEA optimized designs for specialized applications, such as 5 axis machining of impellers. Exported to 100+ countries, these holders are trusted by aerospace and automotive manufacturers for their ability to deliver precision and reliability in demanding machining operations.
03
Jun
03
Jun
03
Jun
03
Jun
EN
