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SHRINK FIT EXTENSION | TOOL HOLDERS
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Accuracy
PAC Precision Tools Shrink Fit Extensions are designed to extend tool reach while maintaining high concentricity, rigidity, and clamping performance in high-speed CNC machining operations.
They are ideal for precision milling, finishing, and high-speed cutting where extended reach is required without compromising accuracy or stability.
Dimensions
Features
- Balanced to 25,000 RPM at G2.5
- High clamping force through thermal shrink technology
- Excellent concentricity for extended tool reach
- Superior rigidity to minimize deflection
- Hardness: HRC 56–58
- Case Depth: 0.8 mm ± 0.2 mm
- Surface Roughness: Ra < 0.0005 mm
- Engineered from premium case-hardened alloy steel
- Available with through-coolant capability for improved chip evacuation and cooling
PAC Precision Tools, a Shrink Fit Extension distributor in the USA, provides secure tool holding, reduced vibration, improved surface finish, and extended tool life even in demanding high-speed machining environments. Designed for accuracy and stability, they are the ideal solution for deep cavity machining and precision applications.
Frequently Asked Questions
1. What is a Shrink Fit Extension?
A Shrink Fit Extension is an attachment used to extend the reach of cutting tools in CNC machining. It uses shrink-fit technology to hold tools firmly and maintain high accuracy, even at longer overhangs. As a precision tools supplier in the USA, PAC Precision Tools provides extensions designed for stable and precise machining.
2. Why are Shrink Fit Extensions used in CNC machining?
They are used when tools need extra reach to access deep cavities, pockets, or hard-to-reach areas. Shrink Fit Extensions offer strong clamping, low runout, and excellent rigidity, helping maintain accuracy even during long-reach machining.
3. Are Shrink Fit Extensions suitable for high-speed machining?
Yes, they are balanced for high-speed operations and provide vibration-free cutting. This helps improve surface finish, reduce chatter, and extend tool life, making them suitable for precision machining and mold-making applications.
4. What tool shank sizes are supported by Shrink Fit Extensions?
They are compatible with standard h6 tolerance tool shanks. PAC Precision Tools USA offers various bore sizes to fit many carbide tools commonly used in CNC machining.
5. How do I install a tool into a Shrink Fit Extension?
Use a shrink-fit heating device to heat the extension, which expands the bore. Insert the tool, allow it to cool, and the shrink-fit mechanism will tightly grip the tool shank, providing exceptional holding force and accuracy.
6. How should I maintain a Shrink Fit Extension?
Clean the bore regularly, remove chips or coolant buildup, and store the extension in a moisture-free environment. Avoid overheating during shrink-fit cycles to maintain precision and prevent material fatigue.
7. Need help choosing the right Shrink Fit Extension?
For guidance, you can contact us here +1 262-282-2456 or email us at sales@pactoolsusa.com. As a CNC tools distributor in the USA, we can recommend the right extension size for your machine and application.
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