Why do screws loosen? This explains the causes of screw loosening!
The loosening of screws is related to the decrease in fastening force (bolt axial force), and the causes can be broadly divided into two categories: "non-rotational loosening of screws" and "rotational loosening of screws." When the bolt axial force is low or decreases, the number of cycles until bolt failure decreases, leading to a very dangerous situation. In combination with measures against non-rotational loosening, our 'HLN Hard Lock Nut' exhibits a powerful anti-loosening effect based on the principle of wedging. Therefore, you can use it with confidence without worrying about a decrease in fastening force. [Causes of Screw Loosening] ■ Non-rotational loosening of screws - Initial settling - Indentation loosening - Loosening due to micro-motion wear, excessive tightening, and other external forces - Loosening due to thermal causes ■ Rotational loosening of screws *For more details, please refer to the PDF document or feel free to contact us.
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basic information
【Hard Lock Nut Features】 ■ World-recognized anti-loosening effect ■ Torque and axial force management possible ■ Reusable ■ Easy and good workability ■ Contributes to significant cost reduction *For more details, please refer to the PDF document or feel free to contact us.
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Company information
Hard Rock Industries is a company that develops, produces, and sells "locking nuts," and it was established in 1974. Our Hard Rock Nuts were created from the strong desire of our founder and technical president, Katsuhiko Wakabayashi, to eliminate accidents caused by loosening screws and to create a safe and secure society. We are still advancing the development and improvement of new anti-loosening products. Our products are used in critical safety locations and areas where maintenance and inspection are challenging. <Main Clients> Railway market (vehicles, tracks, overhead lines, etc.), bridges and highways, transmission towers, construction and civil engineering, plant equipment, industrial machinery, etc.
![[Technical Information] How to detect looseness? Axial repeated load testing.](https://image.mono.ipros.com/public/product/image/196/2000560040/IPROS02079253595203390592.png?w=280&h=280)
![[Technical Information] How to detect looseness? (NAS Test)](https://image.mono.ipros.com/public/product/image/8bc/2000560044/IPROS47300147668062805210.png?w=280&h=280)
