An innovative product that can tighten huge bolts and nuts that cannot be tightened by human strength with just one torque wrench.
A mechanical bolt tensioner developed in 1984 at the request of US Steel, the largest steel company in the United States. By distributing the enormous torque required to tighten large-diameter bolts into smaller torque, it dramatically improves work safety. It also achieves remarkably accurate fastening force, allowing for work in high and confined spaces without issues. The use of electric tools and air tools further reduces work time, dramatically shortening downtime caused by operations and enabling low-cost operations. 【Features】 ■ Incredible axial force accuracy due to patented structure (over three times the accuracy of conventional methods) ■ Large-diameter bolts can be fastened with just one torque wrench ■ Does not depend on the skill of the operator, ensuring accurate fastening force regardless of who performs the work ■ Exceptional axial force stability prevents loosening even under intense vibrations ■ Strong against loosening that does not involve reverse rotation during thermal cycles, thanks to elastic fastening ■ Usable without issues in confined and elevated spaces *For details, please refer to the catalog or contact Nord-Lock Japan. *Beware of imitation products that resemble the appearance. They do not have equivalent functions due to patented technology. Nord-Lock Japan also provides various technical support. Please feel free to consult us.
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basic information
【Lineup】 ■ Nut-type Tensioner * Can be directly replaced with existing nuts - MT Series - CY Series - H650 Series - H650T Series - SJ Series ■ Bolt-type Tensioner * Can be directly replaced with existing bolts/studs. No protrusion. - SB8 Series - SB12 Series ■ Flex Nut * Used as a receiver for through holes. Maintains axial force accuracy. - SX8 Series - SX12 Series For more details, please refer to the catalog or feel free to contact us.
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Applications/Examples of results
<Representative Usage Achievements> ■Power Industry - Gas turbine and steam turbine casings - Reactors and power generation equipment at nuclear power plants - Coupling parts of turbine rotors - Generators - Heat exchangers - Wind turbines - Large bearings for wind power generation equipment, etc. ■Machinery Manufacturing - Pump casings - Pump heads - Compressor casings - Compressor piston end nuts - Tie rods for press machines - Couplings and high-pressure piping for piping flanges - Large valves ■Steel Industry - Rolling equipment - Reduction gears and pinion stands - Press equipment - Hydraulic cylinders - Thrust collars - Shaft mounts, etc. For more details, please refer to the catalog or feel free to contact us.
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Company information
Nortlock Japan Co., Ltd. aims to be a partner in solving all bolt fastening challenges, centered around four brands: the "Nortlock Washer," a locking mechanism that does not rely on friction and prevents loosening; the "Superbolt," which allows enormous bolts and nuts that cannot be tightened by hand to be tightened with just one torque wrench; the "Boltight," which can simultaneously tighten multiple large-diameter bolts with uniform pressure; and the "Expander," a pivot pin for construction and heavy machinery that can be used semi-permanently.