--- title: Shrink fitting description: The shrink fitting is a fastening system that allows to tighten the tools in carbide and super fast steel with a cylindrical shank, for quick, lean and decluttering machining. Read more on the Blog. image: https://blog.sautool.com/hubfs/01228381.jpg --- [![logo-sau-blu@2x](https://blog.sautool.com/hubfs/logo-sau-blu@2x.svg)](https://blog.sautool.com/blog?hsLang=en) [GO TO SAUTOOL.COM](https://www.sautool.com/en) [Contact us](https://sautool.com/en/contact-us) News # Shrink fitting The shrink fitting is a fastening system that allows to tighten the tools in carbide and super fast steel with a cylindrical shank, for quick, lean and decluttering machining. Read more on the Blog. [SAU Team](https://blog.sautool.com/en/author/sau-team) Jan 4, 2022 --- The shrink fitting is **a fastening system that allows to tighten the tools** in carbide and super fast steel with a cylindrical shank, for quick, lean and decluttering machining.   ## How does the shrink fitting work? Thanks to the increase of the temperature of the spindle (300° - 340°) in a few seconds **the expansion of the internal diameter is achieved, allowing quickly the insertion of the tool** suitable for the defined machining. ![calettamento a caldo pg1107](https://blog.sautool.com/hs-fs/hubfs/calettamento%20a%20caldo%20pg1107.jpg?width=1642&name=calettamento%20a%20caldo%20pg1107.jpg) Once the spindle has cooled down, the internal hole returns to its original size and **the tool remains extremely rigid,** thanks to a very high radial clamping force. The result is **a much greater balancing** compared to cold shrinking, ensuring greater **stability** and **avoiding oscillations, undulations and vibrations.** This technology is ideal for the company that needs **lean, rigid and precise machining.** Thanks to a quick insertion and extraction of the tool**, higher and faster performances** are obtained**,** which are optimal for example in the case of **super finishes.** [Read more about the advantages of this technique in the blog article.](https://blog.sautool.com/en/advantages-of-shrink-fitting-and-extendable-spindles?hsLang=en) ## For which mechanical processes is indicated? The processes for which it is most suitable are **milling, drilling, boring** and wherever **high precision, high rigidity and execution speed** is required. ![0124343imgs](https://blog.sautool.com/hs-fs/hubfs/0124343imgs.jpg?width=600&name=0124343imgs.jpg) One of the many advantages of this system is the **reduction to a minimum of the overall dimensions in the cutting area**, a fundamental requirement in the deeply decluttered machining and that require extreme precision. We remember you that for the shrink fitting is necessary to use **spindles with cylindrical shank in tolerance H6 or lower.**   ### What are the areas of use? The shrink fitting is a type of clamping suitable for many industries and mechanical workshops. The main areas of use are **automotive, mechanical construction in general, biomedical, aeronautical and aerospace.** The power of the induction machine for shrink fitting and the consequent performances are different. **More powerful is the machine, faster the expansion will be** and the external body will expand faster, significantly reducing processing times. [**Contact a SAU technician**](https://www.sautool.com/en/contact-us) to find out which **induction machine is best suited** for the machining you need to perform. [News](https://blog.sautool.com/en/tag/news) ## Similar posts News ### [Carbide aluminium milling cutters: the new SAU milling cutters](https://blog.sautool.com/en/cardibe-milling-cutters?hsLang=en) Looking for a carbide aluminium milling cutter? Check out the new SMW3414 roughing cutter and SM3510 aluminium finishing cutter. SAU Team May 9, 2024 News ### [Solid carbide cutters | News from SAU](https://blog.sautool.com/en/solid-carbide-cutters?hsLang=en) The new SM 4314 carbide milling cutters with coolant on the cutting edge enrich the SAU milling tool family. SAU Team Sep 11, 2023 News ### [Types of carbide cutters and insert cutters](https://blog.sautool.com/en/types-of-carbide-cutters-and-insert-cutters?hsLang=en) Which solid carbide milling and inserts cutters does SAU offer? What are their characteristics and the advantages of using them? Read more about them... 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