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[Technical Information] About the Structure of Screws

[Technical Information] About the Structure of Screws

We will provide a detailed introduction with diagrams and tables about the commonly used metric threads for fastening!

In the fastening of mechanical structures (screw joints), screws are important components. They can be removed when necessary. The ability to repair mechanical structures and reuse them is a key feature. According to the screw fastening general rules (JIS B 1083:2008), screw fastening is a method or state of joining two or more items by fitting the threaded part of a bolt with the nut or the internally threaded part formed on the item, and tightening the screw. A screw joint is defined as the entire structure that has a screw fastening part or a part of a structure that includes a screw fastening part. Our technical information site "Screw Fastening Technology Navigation," which contributes to solving screw fastening challenges, provides detailed information about "the structure of screws." Please take a look through the related links. *For more details, please feel free to contact us.

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[Technical Information] Regarding Tightening Stress

[Technical Information] Regarding Tightening Stress

I will introduce tensile stress σ and shear stress τ!

When tightening bolts and nuts, the points to be aware of regarding the relationship between the tightening torque and axial force in the threaded connection can be broadly divided into the following two points: (1) When the tightening torque is too high relative to the strength of the bolt and nut. (2) When the tightening torque is too low relative to the strength of the bolt and nut. Our technical information site, "Screw Fastening Technology Navigation," which contributes to solving issues related to screw fastening, confirms the stresses generated inside the bolt during tightening and provides detailed information on the damage to screws when the tightening torque is too high. Please take a look through the related links. *For more details, feel free to contact us.

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[Technical Information] On Metal Damage: "Corrosion"

[Technical Information] On Metal Damage: "Corrosion"

We will provide a detailed introduction to general corrosion, pitting corrosion, and galvanic corrosion!

The main forms of corrosion include "uniform corrosion, pitting corrosion, and galvanic corrosion." Other types of corrosion include "crevice corrosion," which occurs due to the formation of an oxygen concentration cell in very small gaps on the order of microns; "grain boundary corrosion," where crystal grain boundaries are preferentially corroded; "erosion corrosion," which involves corrosion accompanied by the action of fluid wear; and "high-temperature oxidation," which occurs when exposed to high-temperature air or steam. On our technical information site "Screw Fastening Technology Navi," which contributes to solving issues related to screw fastening, we introduce the three main forms of corrosion (uniform corrosion, pitting corrosion, and galvanic corrosion). Please take a look through the related links. [Contents] ■ Main forms of corrosion - Uniform corrosion - Pitting corrosion - Galvanic corrosion ■ Special corrosion cracking - Stress corrosion cracking - Hydrogen embrittlement cracking *For more details, please feel free to contact us.

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Basic knowledge of screws, including technical information on fastening and loosening.

Basic knowledge of screws, including technical information on fastening and loosening.

We have prepared technical materials on screw fastening and loosening in the form of columns, videos, and downloadable resources. This is a site we would like engineers to utilize.

Content Overview 【Loosening of Screws】 Principles/Types/Evaluation/Testing/Countermeasures 【Design and Tightening of Screw Fasteners】 Mechanics/Design of Screw Fasteners/Screw Tightening Methods/Screw Tightening Tools 【About Screws】 Standards/Types and Usage/Materials/Surface Treatment/Strength of Screw Components 【Screw Troubles】 Troubles during Screw Tightening/Troubles after Screw Tightening/Others (Troubles) ↓↓For more details, click here↓↓

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