ノルトロックジャパン List of Products and Services

The publication includes issues related to bolt fastening, factors causing axial force loss, methods for preventing loosening of bolt fastenings, and guidance for selecting anti-loosening measures. It compares and evaluates common methods for preventing loosening of bolt fastenings in the service life of assemblies, allowing you to choose appropriate fastening methods to solve problems related to bolt fastening. [Contents (excerpt)] ■ Why do bolts loosen? ■ Issues with bolt fastening ■ Factors causing axial force loss ■ Guidance for selecting anti-loosening measures ■ Anti-loosening methods for bolt fastening by product ■ Corrosion prevention for metals >>>NEWS<<< Nord-Lock Japan will exhibit at the "Plant Maintenance Show" held from July 24 to 26. If you plan to attend or are interested, please stop by our booth (M4-176).

• bolt

This product is a wheel nut that does not allow physical loosening, suitable for a wide range of applications from commercial vehicles such as trucks and buses to construction machinery, agricultural machinery, and forestry equipment. It contributes to preventing accidents caused by wheel detachment and reducing vehicle maintenance costs. It can be used with metal rim wheels that have a flat seating area for the nut. Even in Dakar Rally competition vehicles, it does not loosen despite being subjected to intense vibrations and shocks during driving, receiving overwhelming support from mechanics and drivers participating in the rally. 【Features】 - Reduces maintenance work and time related to wheel nuts - Lowers maintenance costs paid for services - Reduces the risk of property damage and personal injury accidents due to tire detachment - Usable with almost all flat rim wheels - Wide size range from M16 to M24 *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements
• nut

The GT tensioner is ideal for medium to high-strength studs and bolts. It is also suitable for use in harsh environments, allowing for the safe and easy installation of high axial forces, and can be used with various large-diameter bolts. The small jack bolt at the top of the product can be installed and removed with hand tools, enabling consistent axial force regardless of the operator's skill level, thus providing high reproducibility. Additionally, we maintain stock domestically, allowing for short delivery times.

• nut
• bolt
• Metal bearings

The hydraulic bolt tensioner "Boltight," a member of the Nord-Lock Group, was born as an evolved version re-invented by the engineer Fred Heaton, who originally developed the tensioner, to address the challenges faced by the tensioner itself. These challenges include common disadvantages of hydraulic tools like tensioners, such as being "too heavy and difficult to work with," "leaking oil after repeated use," and "not being able to be installed in tight spaces." All of Boltight's tensioners have been significantly lightened to the extreme, utilizing in-house developed bridges and seals to reduce the weight of the tensioner. Additionally, the durability for repeated use has greatly improved through technologies such as in-house developed seals. Furthermore, we can flexibly customize the shape and size for areas where space constraints prevent standard applications, delivering them with the same lead time as standard products.

• Torque wrench
• Hydraulic Equipment
• Other work tools

Wear occurring in movable parts is a major enemy of low-cost operation, as it requires regular maintenance such as bush replacement and pin hole repair. For equipment manufacturers, it is an issue that cannot be overlooked, as it increases maintenance costs, which are a quality indicator of the machine, and shortens product lifespan. For machine users, it leads to chronic problems of high maintenance costs and downtime. The advantage of the Expander System is that it can be used semi-permanently and completely prevents wear in movable parts, eliminating the need to replace bushes like consumables. In movable parts that do not use bushes, it can eliminate oval deformation. The secret lies in the fact that after installation, the pin's axis expands in a way that completely seals the gaps inside the pin hole. The Expander System is already widely adopted by top construction equipment manufacturers, including Japanese companies, and has passed a continuous practical durability test of 60,000 hours without any loss of functionality at Volvo Construction Equipment. It comes with a lifetime warranty, guaranteeing the product's functionality until the first removal. *For more details, please download the catalog or feel free to contact us.

• shaft
• Other machine elements
• joint

Many structures, as well as the construction of those structures, use countless bolts. Naturally, measures to prevent bolt loosening are essential in all situations. "Nortlock Washers" require no complicated procedures; simply tightening the bolts powerfully prevents loosening. Nortlock Japan is committed to providing full support so you can use our products with confidence. Let us work together to ensure the safety of society. 【Features】 ■ High anti-loosening effect that physically draws out the bolt's axial force ■ Just tighten the bolts and nuts ■ The same high anti-loosening effect regardless of who tightens them ■ Cost reduction through shortened construction time due to simple fastening work ■ Loosening can be checked with alignment mark checks, allowing for maintenance cost reduction *For more details, please refer to the PDF materials or feel free to contact us.

• Other work tools

The "Nortlock Washer" is a loosening prevention washer that is resistant to vibrations and shocks. It is a simple task of placing it under bolts or nuts and tightening, which shortens construction and maintenance time. It provides the same effect regardless of who tightens it. Using this product helps to address aging issues. 【Features】 ■ NETIS registered product "KKK-190002-A" ■ Loosening prevention that physically suppresses loosening (patented structure) ■ Loosening prevention washer that is strong against vibrations and shocks ■ Simple task (just place it under bolts or nuts and tighten) ■ Reduces construction and maintenance time ■ Same effect regardless of who tightens it *For more details, please refer to the PDF document or feel free to contact us. *Inquiries about product samples are also welcome.

• Other work tools

The "Nortlock Washer" is a product that, when placed under bolts and nuts and tightened once, exhibits a powerful anti-loosening effect. By inserting a pair of washers with a cam surface and radial rib surface, the axial force increases when loosening forces are applied, achieving anti-loosening without relying on friction. It is resistant to vibrations and impacts, providing a long-lasting anti-loosening effect. 【Features】 ■ No issues when used in conjunction with hot-dip galvanized coatings ■ No need for double nuts; simply insert into a single nut ■ Allows for easy and reliable fastening regardless of the operator's skill level ■ Suitable for maintenance in hard-to-reach areas such as high places or narrow spaces ■ NETIS registered product (KKK-190002-A) *Documentation introducing product features can be viewed from the "Download" section. (The documentation also includes links to case study pages.) *Feel free to contact us for inquiries about product samples and more.

• Other work tools

This article introduces the issues with bolt fastening around heat exchangers and piping, specifically focusing on the causes and improvement measures for leaks at flanges. The causes include "insufficient axial force (surface pressure) management," "misalignment and damage of gaskets," and "reduction of axial force due to temperature cycles (essential factors)." There is a minimum surface pressure required to prevent leaks, but due to the above causes, it is not possible to secure and maintain the necessary surface pressure, resulting in leaks occurring between the flanges. As an improvement measure, there is a "tensioning method" that allows for management of bending stress and axial force. It can be fastened without rotation, thus not affected by friction, allows for axial force management, and pulls straight to prevent misalignment. [Proposed Products] ■ Superbolt ■ Boltight *For more details, please refer to the PDF document or feel free to contact us.

• Heat exchanger

We will introduce the issues related to the threaded connections in heat exchangers and piping, specifically the causes and solutions for "galling (seizing)." There are many factors said to contribute to galling, such as materials that are prone to galling, differences in thermal conductivity, and thermal expansion rates. However, galling occurs due to the frictional heat generated when the female and male threads rub against each other while tightening the screw, causing the threads to momentarily melt, solidify, and seize. Therefore, the tightening method that generates this frictional heat can be considered the fundamental cause of galling. As a solution, there is a "tensioning method" that allows for fastening without rotation. This fastening method enables tightening and loosening without rotation, thus preventing galling. [Proposed Products] ■ Super Bolt ■ Boltight *For more details, please refer to the PDF document or feel free to contact us.

• Heat exchanger

This document introduces common issues and solutions related to screw fastening troubles in heat exchangers. It includes topics such as "Causes and Solutions for Galling (Seizing)," "Causes and Solutions for Leaks at Flanges," and "Causes and Solutions for Screw Loosening." If you have any requests for product descriptions, demonstrations, catalogs, or samples, please feel free to contact us. [Contents] ■ Nord-Lock Product Lineup ■ Troubles with Screw Fastening in Heat Exchangers and Piping ■ 1. Causes and Solutions for Galling (Seizing) ■ 2. Causes and Solutions for Leaks at Flanges ■ 3. Causes and Solutions for Screw Loosening *For more details, please refer to the PDF document or feel free to contact us.

• Heat exchanger

Here is an example of the use of Nord-Lock products in the Tokyo Skytree. Standing at 634 meters tall, the Tokyo Skytree is constructed with modern design and world-class technology. However, when building such a tall tower, it is necessary to take sufficient measures against strong winds, earthquakes, and rust, especially since it is close to clouds at high humidity. Therefore, our "Nord-Lock 254SMO washers" were adopted. Tens of thousands of these washers in various sizes have been installed on the tower, and it has been confirmed that equipment secured with these products remained safely fixed even after the terrifying magnitude 9.03 earthquake that struck Tohoku on March 11, 2011. [Case Overview] ■Adoption Site: Tokyo Skytree ■Adopted Product: Nord-Lock 254SMO Washer *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

We would like to introduce a case study of Coretech Co., Ltd., which adopted Nord-Lock products. The company was using double nuts to secure tie rods that are constantly exposed to the impact and load of presses, but the effectiveness varied depending on the operator when using double nuts. Moreover, when it comes to larger sizes like tie rods for presses, the task of tightening the nuts itself was quite challenging and time-consuming. Therefore, they adopted our "Superbolt." As a result, concerns about maintenance after product delivery were eliminated, providing significant peace of mind psychologically. [Case Overview] ■ Customer: Coretech Co., Ltd. ■ Adopted Product: Superbolt *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements
• bolt

We would like to introduce a case study of Sodick Co., Ltd., which adopted Nord-Lock products. Our engineers examined the design of Sodick's bolt fastening components and noticed that the tie rod bolts of their injection molding machines were being fastened using traditional methods. As a result, we adopted our "Superbolt." Consequently, this product solved the issues with the injection molding machines. We received reports that "the customer's site is operating quickly and smoothly, and they are satisfied." 【Case Overview】 ■ Customer: Sodick Co., Ltd. ■ Adopted Product: Superbolt *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements
• bolt

We would like to introduce a case study of Shibuya Archery, which adopted Nord-Lock products. In the case of sights for compound bows, one of the issues with the old model was that the screws used to secure the sight would loosen. To address this, we adopted our "Nord-Lock Washer." In the Ultima series compound bow sight "Ultima CPX," this product is used to securely fix the sight, eliminating concerns about screw loosening due to bow vibrations during shooting. Additionally, a lightweight design and a patented unique system have been implemented. [Case Overview] ■ Customer: Shibuya Archery ■ Application: Fixing the sight (sighting device) ■ Usage Location: Sight for compound bows ■ Adopted Product: Nord-Lock Washer *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

Here is a case study of Shimamura Music's guitar repair workshop, which adopted Nord-Lock products. Every day, numerous instruments are brought in for repairs at the company, but the most common issue is broken jacks. To address this, they adopted our "Nord-Lock Washer." Since then, guitars that had our product installed during repairs have not returned to the workshop due to broken connections. [Case Overview] ■ Customer: Shimamura Music Guitar Repair Workshop ■ Application: Repair of internal jack disconnections in electric guitars ■ Usage Location: Securing the cable jack nut ■ Adopted Product: Nord-Lock Washer *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

Here is a case study of East Japan Railway Company, which adopted Nord-Lock products. For example, the platforms of the Genbi Shinkansen have safety barriers installed to prevent passengers from falling, and these are supported by "Nord-Lock washers." One of the partner companies of Daiichi Construction Industry Co., Ltd., which is responsible for the facility construction, Eiko Sangyo Co., Ltd., was greatly impressed by the results of the Junker vibration test demonstrated by our sales engineer and immediately recognized its reliability. Together with Daiichi Construction Industry Co., Ltd., we proposed this to JR East, and it was realized within a few days. [Case Overview] ■ Customer: East Japan Railway Company, Daiichi Construction Industry Co., Ltd., Eiko Sangyo Co., Ltd. ■ Application: Fixing of Genbi Shinkansen platform barriers ■ Adopted Product: Nord-Lock washers *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

Here is a case study of Kawasaki Heavy Industries, Ltd. that adopted Nord-Lock products. In the company, some bolts used in the compressor and turbine sections of the M7A gas turbine were secured with wire locks to prevent loosening. There were challenges as the effectiveness of the loosening prevention depended on the skill of the workers, leading to low work efficiency. Additionally, there was a risk of wire breakage during operation due to insufficient tightening of the wire. Therefore, our "Nord-Lock washers" were adopted. As a result, not only did the difficulty of the work significantly decrease, but the work time was also overwhelmingly shortened. 【Case Overview】 ■ Customer: Kawasaki Heavy Industries, Ltd. ■ Product: M7A-03D Gas Turbine ■ Adopted Product: Nord-Lock Washer *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

Here is a case study of Hino Motors, Ltd., which adopted Nord-Lock products. The company is a Japanese automobile manufacturer that participates every year in the Dakar Rally, known as "the toughest race in the world." Our products are used in over 20 fastening points, including the wheel area, which is subjected to harsh vibrations, as well as shock absorbers and propeller shafts. Nord-Lock, which eliminated the time spent on "re-tightening," contributed not only to safety but also to securing work time. 【Case Overview】 ■ Customer: Hino Motors, Ltd., Japan Racing Management Co., Ltd. ■ Product: Hino Ranger ■ Adopted Products: Nord-Lock washers, wheel nuts *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

We would like to introduce a case study of Mitsubishi Hitachi Power Systems, which has adopted Nord-Lock products. The company, formed by the merger of Mitsubishi Heavy Industries and Hitachi, Ltd., has a wide range of product offerings, enabling it to meet diverse power supply needs both domestically and internationally. Among its diverse lineup, the J-Series gas turbine stands out for its excellent output and efficiency. Its reliability, verified over many years at a combined power generation plant demonstration facility in Takasago City, Hyogo Prefecture, has garnered significant support from customers at power plants both in Japan and abroad. Additionally, the frequent use of "Nord-Lock washers" has contributed to improved maintenance and increased customer satisfaction. [Case Overview] ■ Customer: Mitsubishi Hitachi Power Systems, Ltd. ■ Product: J-Series Gas Turbine ■ Adopted Product: Nord-Lock Washer *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

We would like to introduce a case study of Mitsui Engineering & Shipbuilding Co., Ltd., which adopted Nord-Lock products. The company focuses on creating products that are easy to assemble on-site to ensure smooth operations in the downstream processes. For example, the chain case of the engine, which is secured with a vast number of bolts, previously used wire locks for loosening prevention. However, the company changed all of these to "Nord-Lock washers." "We found that wire locks can be uncertain as they depend on the skill of the workers, but with Nord-Lock, anyone can easily install them, significantly reducing work time and ensuring reliability," was their feedback. 【Case Overview】 ■ Customer: Mitsui Engineering & Shipbuilding Co., Ltd. ■ Product: Marine 2-Stroke Diesel Engine ■ Adopted Product: Nord-Lock Washer *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

We would like to introduce a case study of Tokai Railway Company (JR Tokai) that adopted Nord-Lock products. The company has had skilled workers who meticulously maintain and inspect their systems day and night to ensure safety, which required a tremendous amount of effort and time. Therefore, they adopted our "Nord-Lock Washer." This product has a mechanism that prevents loosening and rotation under even the harshest vibration environments, significantly advancing this long-standing issue. 【Case Overview】 ■ Customer: Tokai Railway Company (JR Tokai) ■ Product: Shinkansen N700 Series Vehicles ■ Adopted Product: Nord-Lock Washer *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

The product is a Nord-Lock washer specifically designed for high-strength bolts used in construction, easily replaceable with flat washers as specified in EN 14399-6. It is widely used in structural steelwork and bridge construction in many countries where European standards apply, physically preventing bolt loosening caused by vibrations from vehicle traffic and other sources. The chamfer treatment on the inner diameter is applied to both sides of the two-piece set, eliminating the risk of incorrect assembly orientation. 【Features】 ■ Physically prevents rotational loosening in steel structures ■ Product design specialized for HV or HR sets and CE marked ■ Allows for a highly reliable fastening design even with short fastening lengths ■ Provides the same effect regardless of the skill or experience of the operator ■ Usable in a wide temperature range from -50°C to 150°C *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

We would like to introduce the "Nord-Lock X Series Washers" that we handle. This product can prevent both "rotational loosening," which occurs due to reverse rotation, and "non-rotational loosening," which does not involve reverse rotation due to thermal expansion and contraction or surface indentation, all with a single product thanks to its unique product technology. By incorporating a disc spring shape into the wedge-locking technology in the product design, it also prevents the loss of axial force caused by "settling," which inevitably occurs in metal-to-metal fastening, thereby protecting the fastening joint at an even higher level. 【Features】 ■ Simultaneously addresses two types of loosening with a single solution ■ Allows for a highly reliable fastening joint design even with short fastening lengths ■ Stable friction coefficient due to unique technology ■ Work is completed simply by tightening through the bolt axis ■ Leads to significant reductions in workload and time *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

This document introduces various topics, including the challenges of developing rocket engines for the upper atmosphere, the potential of floating offshore wind power, lessons learned from the development of high-speed railways in deserts, and the reconsideration of manufacturing and steel usage for sustainable development. It presents methods for making steel sustainable throughout the entire lifecycle, from raw materials to product lifespan. We encourage you to read it. [Contents (excerpt)] ■ Challenges in developing rocket engines for the upper atmosphere ■ Potential of floating offshore wind power ■ Lessons learned from the development of high-speed railways in deserts ■ Reconsidering manufacturing and steel usage for sustainable development ■ Super bolts solving maintenance challenges *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

This document covers all factors related to bolt loosening and whether torque management is truly correct, as well as why bolt breakage occurs. It ensures that loosening does not happen, increases work efficiency without adding labor hours, shortens work time, and achieves the same effect regardless of who tightens the bolts. In this era, it is essential to focus on reducing maintenance costs and saving time. To achieve this, correct knowledge is also necessary. We encourage you to read it. 【Contents】 ■ All factors of bolt loosening ■ Is the torque management truly correct? ■ Why does bolt breakage occur? ■ THE VOICE OF WISDOM ■ Nord-Lock Product Guide *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

This catalog introduces the "Nord-Lock Washer," which utilizes wedge-locking technology to prevent bolt loosening "physically" without relying on friction. We offer a lineup that includes the "Nord-Lock X Series Washers," which simultaneously prevent two types of loosening, and the "Nord-Lock SC Washers," designed for high-strength bolts used in construction. Additionally, we provide information on why bolts loosen and feature the Nord-Lock customer magazine. [Contents] - Nord-Lock Washer Product Catalog - Why Do Bolts Loosen? - Nord-Lock Customer Magazine *For more details, please refer to the PDF document or feel free to contact us.

• Other machine elements

The "Nord-Lock Washer" is a unique product that prevents bolt loosening "physically" by utilizing axial force rather than friction. High fastening axial force has been demonstrated through the Junker vibration test, and it is not affected by the use of lubricants or loss of axial force due to heat or settling. It can be easily fastened, leading to reduced work time, and it also suppresses variations in work quality. Since re-tightening is unnecessary, it contributes to simplifying maintenance. Its high quality and safety have been recognized, and it has been registered in the database "NETIS" (New Technology Information Sharing System) operated by the Ministry of Land, Infrastructure, Transport and Tourism. (Registration number: KKK-190002-A) 【Features】 ■ Easy to fasten and remove, allowing for reduced work time without increasing labor hours ■ Reusable, enabling cost reduction (the limit on reuse is determined by axial force) ■ Fastening force has been verified through the Junker vibration test in accordance with DIN65151

• bolt
• Other metal materials

In various plant maintenance activities, the removal and re-tightening of bolts is rarely the "goal." Nevertheless, the reality is that addressing issues such as breakage and loosening, as well as the removal and re-tightening process itself, often requires significant time and cost. ■ Events where improvements can be expected (examples) - Loosening of bolts and nuts - Fatigue failure of bolts or breakage for unknown reasons - Reduction of time for bolt removal/re-tightening - Need for reliable measures for fastening parts that require high precision in axial force - Measures to eliminate the need for cranes in the removal/re-tightening of large-diameter bolts - Significant reduction in work time for the removal/re-tightening of large-diameter bolts - Significant reduction in physical strain from the removal/re-tightening of large-diameter bolts - Eradication of galling and seizing - Play in movable parts (due to wear in pin holes) - Elimination of the need for complete part replacement due to wear in movable parts - Elimination of costly service requests due to wear in movable parts - Elimination of the need for bushing replacement due to wear in movable parts Most of the above events can be improved in nearly all cases. For more details, please download the catalog or contact us.

• fastener
• bolt
• shaft

The "Expander System" eliminates "wear," which occurs in the movable parts of all types of equipment, such as construction machinery and factory facilities, and is a cause of rising maintenance costs. After installation, the shaft expands in a way that increases its diameter, filling the clearance inside the pin hole to eliminate stress concentration and resolve wear. It is used in construction vehicles, civil engineering, and facilities. 【Features】 ■ Solves "wear" that occurs in the movable parts of all types of equipment, such as construction machinery and factory facilities ■ Expands in a way that increases the diameter of the shaft after installation ■ Fills the clearance inside the pin hole to eliminate stress concentration ■ Size: Pin diameter from φ15mm / Pin length is optional ■ Compatible with all forms of grease application, including surface coating and internal injection *For more details, please refer to the PDF document or feel free to contact us.

• Other metal materials
• Other work tools

The "Super Bolt" is a mechanical bolt tensioner. It allows for the tightening of large diameter bolts using standard tools alone, achieving the desired axial force with astonishing precision. Thanks to its patented structure, it does not loosen even under intense vibrations. Sizes are available starting from M16, and other sizes can also be accommodated. 【Features】 ■ Can tighten large bolts using standard tools alone ■ Does not loosen even under intense vibrations ■ Size: Starting from M16 *For more details, please refer to the PDF document or feel free to contact us.

• bolt
• Other metal materials

The "Nortlock X Series" is a product that addresses both "rotational loosening" and "non-rotational loosening" with a single solution. By combining the spring effect (which compensates for the reduction in axial force due to non-rotational loosening) and the wedge locking function (which prevents rotational loosening), it eliminates the need to only address the higher-risk situations or to complicate work processes by combining multiple products. It is used in various bolt fastening applications across the global railway industry, including bogies, couplers, brake systems, outfitting, maintenance of way, and sleepers. 【Features】 ■ Single product solution for both rotational and non-rotational loosening ■ Multi-wedge lock mechanism ■ Many approvals, mainly in Europe ■ Size (steel): M6 to M20 *For more details, please refer to the PDF document or feel free to contact us.

• bolt
• Other metal materials

The "Nord-Lock Washer" employs a "wedge-locking mechanism" and is a loosening prevention product that does not rely on friction. It protects bolt connections from loosening even in the most severe vibration environments, ensuring solid safety. It is used in various bolt connections in the global railway industry, including bogies, couplers, brake systems, equipment, track maintenance, and sleepers. Its high quality and safety have been recognized, and it has been registered in the database "NETIS" (New Technology Information Sharing System) operated by the Ministry of Land, Infrastructure, Transport and Tourism. (Registration number: KKK-190002-A) 【Features】 ■ Loosening prevention that does not rely on friction ■ Wedge-locking mechanism ■ Many approvals and certifications, primarily in Europe ■ Size (Steel): M3 to M130 ■ Size (SUS): M3 to 80 *For more details, please refer to the PDF materials or feel free to contact us.

• bolt
• Other metal materials

Not only bucket pins and attachment pins, but also the wear that occurs in the pin holes of movable parts such as the arms of construction machinery, particularly the phenomenon where the pin holes become oval-shaped, is a source of concern for many people. For manufacturers, this increases maintenance costs, which are a quality indicator of the machines, and shortens the product lifespan. For machine users, it leads to chronic issues with high maintenance costs and opportunity losses (downtime) due to repair periods when the machine becomes unusable. The advantage of the Expander System is that it can be used semi-permanently, contributes to improving machine quality by extending the product lifespan, and significantly reduces running costs and maintenance time. The Expander System is already widely adopted by leading construction machinery manufacturers, including Japanese companies, and has passed a continuous field durability test of 60,000 hours at Volvo Construction Equipment without compromising any functionality. Additionally, all Expander System products come with a lifetime warranty, guaranteeing the product's functionality until the first removal.

• shaft
• Other machine elements
• joint

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.

• bolt
• Other work tools