A nut that does not loosen even after 1 million vibration tests (3D vertical and horizontal)! Compatible bolt sizes: M14 to M100.
■ Structure and Non-Loosening Principle of the Strongest Lock Nut "Bolrock Nut" 1. When the nut is subjected to vibration and attempts to loosen counterclockwise, the fine internal balls utilize a clutch mechanism to exhibit a wedging effect, preventing the nut from turning and loosening. 2. The slope angle of the internal balls is designed to be larger than the "screw lead angle," which is the angle at which the screw rises one full turn. 3. When the nut is tightened, the internal balls automatically move to the deepest part of the groove, aligning the bottom of the nut with the top of the balls, eliminating any gap between them and the floor, thus not affecting the tightening axial force. ■ Vibration Test Condition Data - Bolt Diameter: M16 - Bolt and Nut Material: SCM435 - Frequency: 100Hz - Number of Vibrations: 1,000,000 times - Simultaneous 3D vibration in both vertical and horizontal directions While competitor lock nuts loosen after 1,100 to 2,300 vibrations, the Plarad Bolrock Nut withstands 1,000,000 vibrations, proving its overwhelming vibration resistance. <About the Strongest Lock Nut: Bolrock Nut> For inquiries such as requests for quotes or materials, please contact us. (Company) Nippon Plarad TEL: 078-967-3556
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basic information
■ Nuts that do not loosen even after 1 million vibration tests (3D vertical and horizontal) In loosening vibration tests, for example, the Junker vibration test only applies horizontal vibrations, but the vibrations that bolts actually experience are complex, and it is meaningless unless they are also shaken in the axial direction (vertical). Our company conducts rigorous vibration tests by suspending the testing device in space and applying simultaneous vertical and horizontal "3D vibrations." The intensity of the vibrations is such that, without any loosening countermeasures, a "standard nut" would begin to loosen within 3 seconds under this harsh vibration energy. ■ Efficiency of tightening operations 1. By applying the rotational friction of balls, a large torque is not required when loosening the nut, and it is designed to be loosened at "105% to 110%" during tightening. Therefore, no special tools are needed. 2. There are no restrictions on tightening torque, and it is fine to use manual tools, power tools, or impact wrenches. 3. There is no hassle of changing the tightening torque value with upper and lower nuts like in double nuts, which can lead to construction errors. 4. While double nuts require tightening two nuts, doubling the construction time, the Bol-Lock nut allows for quick bolt tightening with a single nut.
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※The delivery time may vary depending on the quantity, so please feel free to contact us.
Applications/Examples of results
Machines and bolts with vibrations in general. Related to transportation equipment, plants, shipbuilding heavy machinery, steel, power, construction, electrical equipment, facilities, railway equipment, vehicles, industrial machine tools, etc.
Detailed information
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Locking nut "Bolrock Nut"
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Company information
PLARAD is a hydraulic torque wrench manufacturer with the oldest history and tradition in the world (since 1962). The design and manufacturing of all hydraulic torque wrenches began with PLARAD. As a pioneer, it has developed many patented technologies and high-precision hydraulic torque wrenches, electric torque wrenches, air torque wrenches, and bolt tensioners specialized for large bolt tightening, which are used in various industrial fields worldwide. It boasts a lineup of tools with torque ranging from 50 Nm to one of the world's largest tightening torques: 500,000 Nm. - Winner of the Germany TOP 100 Innovators Award. - As a leading company in hydraulic torque wrenches and bolt tensioners, it supplies hydraulic tools for large bolt fastening systems capable of torque management and axial force management to Japan and the world. - Manufacturing, sales, and rental business. - PLARAD hydraulic torque wrenches have numerous delivery records, including the Tokyo Skytree, Abeno Harukas, the world's largest shield machine, the world's largest wind turbine (8.0 MW), the world's longest high-speed tunnel, the linear Shinkansen, Boeing 787, and JAXA Tanegashima Space Center. - Certified with international standards ISO 9001 and ISO 14001.