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The boring tool holder is a specialized tool for performing material removal operations inside holes and cavities of metal parts, requiring high precision and minimal vibration. This tool is typically made of alloy steel with a hardness of 50 to 60 Rockwell C, and its overall length varies from 100 to 300 millimeters depending on the hole diameter. The shank diameter is usually chosen between 8 and 32 millimeters to balance strength and accessibility. The positive or negative rake angle is adjusted between 5 and 7 degrees according to the workpiece material. The insert locking system is often a set screw type or a clamping mechanism resistant to axial forces.
In the design of a boring tool holder, the ratio of overhang length from the carriage to the shank diameter should be less than 4:1 to minimize vibration. This tool can comply with ISO 5608 and ISO 10889 standards. Its weight ranges from 0.2 to 1 kilogram depending on diameter and length. Surface coatings such as TiAlN or TiCN can provide wear and heat resistance up to 800°C. The maximum cutting speed when using a carbide insert with this holder is typically up to 200 meters per minute.
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