Causes of Loose Bolts
Shock: Long hours with alternating heavy loads can create a lot of strain on machinery, no matter how fortified or robust it may have been built. While the bolts may be able to withstand impact and heavy loads, the more frequent it has to endure it, the worse the wear. A sudden force applied to the bolt or the joint can cause the bolt to slip relative to the threads of the joint, the slippage of which can ultimately lead to bolts loosening.
Under-tightening: As is evident on any kind of assembled machinery, a loose bolt that is not properly tightened cannot be guaranteed to hold upright any adjoining segments together. By definition, the joint does not have enough clamp force to hold the individual sections together. This could potentially lead to sideways slippage between adjoining parts, which places an unbearable stress on the bolt that could eventually cause the entire assembly to break.
How To Prevent
Washers: There are many types of washers that have been designed with ribs, fluting, or teeth that cling to the surface of the joint while it is being tightened. The only con for this method is that it can result in permanent damage to the joint finish or surface, which may ultimately deem it as unacceptable according to FAA and other aviation regulations.
Mechanical devices: There are a number of ways that you can prevent a too-loose bolt and one of them is simply by using mechanical devices to lock a tightened nut into place on a bolted joint. Castellated nuts, for example, have a slotted end and are used with a cotter pin or wire that fits through a hole drilled in the bolt. On the other hand, tab washers have two tabs on opposite sides, which fold up to secure the bolt head or nut after installation, and may have teeth that can penetrate the surface of the joint to hold it in place.
Ultimately, there are several methods that you can implement to ensure your bolts are properly installed and maintained. For more information on bolts or other fasteners, reach out to the expert team at ASAP Fasteners.
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Certain aviation seals with the highest demands require special engineering to meet the required performance levels. Because of this, significant research and development goes into the production of seals from composite materials. The introduction of composite seals has redefined what a seals’ function can be. They can be produced from a wide array of materials such as silicone, stainless steel, aluminum, or plastic depending on specific needs. Composite compounds have been especially useful for application on the exterior of aircraft in parts like flaps, rudders, and door seals, all of which have high demands and need seals designed specifically for that purpose. For example, wing seals need to be impervious to corrosion, so special materials are added to the composite to protect the seal.
Another way to specialize aircraft seals for certain tasks is to reinforce them with other materials. For instance, some seals need to be resistant to a massive range of temperatures from -40 F to 1,000 F. For this type of seal, a mix of silicone, fabric, and metal, reinforced with aluminum is used. Other seals have to be resistant to smoke, which can be done by reinforcement with materials specifically designed to be flame resistant.
With varying but equally-important requirements, aircraft connector seals are not a one-size-fits-all part. A seal tailored to your specific needs will last longer and operate without a hitch. At ASAP Fasteners, owned and operated by ASAP Semiconductor, we can help you find the seals you need and many other unique parts for the aerospace, civil aviation, and defense industries. We’re always available and ready to help you find all the parts and equipment you need, 24/7-365. For a quick and competitive quote, email us at sales@asap-fasteners.com or call us at 1-714-705-4780.
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Aerospace technology experiences extraordinary conditions during flight, like the extreme pressure and temperatures while leaving the atmosphere or the intense heat of burning fuel. Because of this, every part of an aircraft must be able to not only survive, but thrive in these conditions. As these aircraft fasteners parts have to withstand a variety of conditions, various fastener materials are optimal for different uses. Here are a few of the different materials used for aerospace fasteners:
Aluminum
Aluminum, a common material for fasteners called rivet fastener, is usually found in atmospheric planes. While it is still employed in aerospace, aluminum requires special treatment before reaching the standards needed for flight beyond the atmosphere. However, this process is not always enough as aluminum is still sensitive to temperatures above 250 degrees fahrenheit.
Steel
The strength and hardness of steel makes it a very popular material for aerospace fasteners. A drawback of steel is that its strength also means it is significantly heavier than other materials. This added weight can lead to a lot of issues, so steel fasteners should only be used when appropriate.
Titanium
Titanium is frequently employed as an alternative to aluminum. The primary benefit of using titanium over other materials is that it has strength that rivals steel while still remaining relatively light. It is also functional in a wide array of temperatures, ranging from -350 to 800 degrees fahrenheit.
Superalloys
High-performance alloys called superalloys are the most versatile of these materials. Superalloys are highly resistant to creep, the slow deformation or movement of a solid under persistent stress. In addition to this, they possess great surface stability as well as better resistance to corrosion and oxidation.
While any of these materials are great for use in fasteners components, it is important to fully understand the circumstances under which the fastener will be used. Each material is ideal for different scenarios, and a fastener tailored to your specific needs will produce the best results.
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Circular connectors feature a plastic or metal shell surrounding the contacts, which are embedded in insulating material to maintain their alignment. These terminals are paired with a connector cable and makes them very resistant to environmental interference and accidental decoupling.
Connectors can be distinguished by their number of pins (usually three, six, or eight per terminal) and by their size, manufacturing specifications, attachment angles, and methods of connection and disconnection.
A “standard” connector refers to a connector whose design conforms to either German or American military standards. American standards are MIL-Spec Connectors and are designed according to the best practices for military and aerospace applications. They are rugged, ideal for high-impact use, and are highly resistant to environmental conditions. Some MIL connectors are air and watertight thanks to an epoxy seal around the terminal. The German standard is DIN Spec Connector (Deutsches Institut fur Normung). DIN standards include high-frequency capability and hallmark features like a protective metal shell and notched, round terminations. Microminiature and nanominiature connectors featuring smaller pin and jack diameters also exist and have more narrowly spaced contacts. This construction helps save surface space across the face of the terminal, and it reduces the connector’s added weight to the component.
Another consideration for circular connectors components is there style of termination. The type of termination chosen determines the nature of the connections between electrical contacts in each of the connector’s components. Options vary regarding cost, ease of connection and disconnection, and resistance to tampering, wear, and environmental damage. Terminal options include:
- Insulation displacement, where the pins in the plug pierce or push aside insulation around the corresponding jacks in the socket, making contact and forming an electrical connection.
- Soldering: using an intervening metal with a low melting point, the metal touches both contacts to form a permanent corridor.
- Screws or lugs: External hardware adheres to threaded (screws) or unthreaded (plugs) holes in the protective shield around each terminal to hold the connection in place.
- Crimping: A contact barrel compresses around the conductor to complete the electrical connection.
- Wire wrap: wires connected to the socket side of the connector attached to the other terminal. The wires wrap around the plug’s jacks, so an exposed segment touches the jack.
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Gear bearings come with numerous benefits and advantages over conventional bearings. Because they eliminate backlash, they are smoother in operation and control. The teeth design in gear bearings gives them superior thrust bearing performance. Gear bearings can also run quieter and with less vibration and suffer fewer fatigue failures. They are also fairly cheap and simple to design and manufacture, while also being more structurally rigid and possess higher load capacity than fixed planetary designs. They can also enable all-electric actuator systems and eliminate hydraulics in many applications.
Gear bearings are used in countless applications. They can be found in almost all forms of transportation including automotive, aviation, marine, and rail. They are also vital for transmissions, electric windows, windshield wipers, steering mechanisms, alternators and generators, engines and propellers, and bearing landing gear. They can also be found in power tools like gardening equipment, chain saws, power drills, and screw drivers. In industrial machinery, they are used in power presses, lathes, and construction equipment, and in farming equipment like tractors, harvesters, and hay rollers.
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These bearings come in several different configurations including drawn cup, precision race, caged roller, and thrust roller bearings. The type that appears most often is the caged roller needle bearing. The caged roller bearings function is to support radial loads and rotational speeds. Developments to these bearings contour have been introduced to reduce roller-end stress from misalignment, or deflection, of one of their base balancing components (known as raceways). These developments enable a more uniform distribution of stress, optimizing the bearings performance. Typical applications for caged needle roller bearings are automotive transmission systems, two and four stroke engines, gearboxes, air compressors, and planetary gear sets.
Although these bearings often serve purposes elsewhere, they are typically designed to meet the specific needs of the aircraft industry in airframe manufacturing. Their design involves heavy outer rings to support high static, oscillating loads. These bearing rings and rollers are constructed of high-carbon chrome steel and are made with a protective finish. Some are intended to work as track rollers while others have applications in mounting housing. For heavier rolling loads, needle roller bearings are wider and have two rows of rollers. In situations with lighter rolling loads, only one row of rollers is needed.
Needle roller bearings are capable of higher load capacities than single-row ball bearings or roller bearings. They have the ability to handle larger, more rigid applications. Their excellent roller characteristics within a small cross section also add to their appeal. They are generally lower cost in comparison with other bearings as well. All of these attributes contribute to why needle roller bearings are a vital component in aircraft manufacturing.
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Fiber optic connectors hold individual fibers in place. They incorporate an associated adapter for alignment and mating of fiber ends which forms a unified connection point. Another way to think of this device is as a plug with a protruding ferrule. A ferrule protects the mating ends of a fiber from degradation, as splitting or cracking will damage the fiber’s ability to reflect light effectively.
While airlines formerly had to rely on an avionics bay to route data through the aircraft, the compact size of the fiber optic optical connector allows distributed avionics to put processing power closer to its point of use. Most aircraft formerly utilized copper cables, which require additional equipment for signal support, adding to overall weight. As a result, fiber optic cables offer 25% in space savings and 50% overall weight reduction. Connectors with composite shells are 40% lighter than metal connectors.
Along with knowing the benefits of connectors, you’ll want to know about the most common connectors that you might come across in aviation. Common 2.5 mm connectors, small form factor connectors, and multi-fiber push on connectors are the most prevalent fiber connectors used within the aviation industry. A general rule for this category of connectors is the following: common 2.5 mm connectors are the most versatile, small form factor(SFF) connectors are intended for high density purposes, and multi-fiber push ons (MPO) support high-data environments.
There are three types of 2.5 mm common connectors, square connectors (SC), firewire connectors (FC), and stainless-steel connectors (ST). As their name suggests, common 2.5 mm connectors have a 2.5 mm ferrule size and therefore can be used interchangeably, or mixed and matched with the addition of a hybrid adapter. These connectors were commonly used in the 1980’s and 1990’s, but the SC connector is still commonly seen in application with fiber optics.
SFF connectors have a latch design that allows for strong connections with reduced signal loss. In addition, it has a 1.25 mm ferrule giving it a compact and reliable design. The low loss connector (LC), a variety of SFF, is one of the most successful connectors in the industry.
To round out our connectors, the most commonly used power connector component in aviation is the MPO. With the rapid advancement of avionic technology, these connectors are necessary to provide high speed data transfer end-to-end. This connector can contain a multitude of fibers and can incorporate multimode fibers as well. MPO connectors are specified as “male” on one end and “female” on the other to ensure that all fibers are properly aligned.
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Barrel Box connectors, or low voltage DC power connectors, have current and voltage ratings, specified by the manufacturer. The jack and the plug feature one exposed conductor and a recessed conductor. Jacks usually receive power and are mounted inside the appliance. A plug is usually located on the electrical cord and supplies power from a power supply. A receptacle is mounted on a power cord as well but receives power from a mating plug. Most engineers accept the center pin configuration as the defining factor for the gender of barrel power connectors. “Male” connectors have a center pin, and the mating receptacles are deemed “female”.
A common way of categorizing barrel connectors is through the diameter of the inner pin and outer sleeve. The diameter of the inner sleeve should be slightly larger than that of the mating pin. Typical mating connections are cantilevered flat springs. Jack insertion Connectors depth dimensions are often less than the plug barrel lengths for the following two reasons. First, the plug barrel may not be required to be completely enclosed by the receiving jack. Second, the depth of the chassis wall must be considered. Additional depth should be accounted for in the plug barrel length when the connectors are mated.
Connector Plugs and jacks often have two conductors, one for power and one for ground. Usually, the center pin is power, and the outer sleeve is ground, but it’s possible for it to be the opposite. Some jacks have a third connector that forms a switch with the outer sleeve conductor; this is used to detect the insertion of a plug or to select between power sources.
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Dzus turnlock fasteners have a stud, grommet, and receptacle. The stud is made from steel and are cadmium plated. There are three head styles: wing, flush, and oval. Turning the stud clockwise locks the fastener and turning it counterclockwise unlocks it. This is done using a specialized tool. The force that locks the stud in place is created by the spring.
Some of the most commonly used Camloc fasteners are the 2600, 2700, 40S51, 4002, and the stressed panel fasteners. Camloc fasteners are used on aircraft cowlings and fairings. The fastener has a stud assembly, a grommet, and a receptacle. Receptacles are sorted into two categories: rigid type and floating type. The receptacle is fastened to the aircrafts structure and the stud and grommet are installed in the removable portion while the stud and grommet are installed in a plain, dimpled, countersunk, or counterbored hole.
Anchor Panel fasteners have a stud, a cross pin, and a stud receptacle. There are flush, oval, and wing studs. It is important to know the thickness of the material being secured, as it has to be determined in order to choose a stud of the correct length. The cross pin is made from chrome-vanadium steel that has been heat treated. They provide the greatest strength, wear, and holding power. Once a cross pin is removed from the stud, a new one must replace it.
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They come in various styles, sizes, and material which should be able to fit all your fastening needs. Once a rivet is installed with a hammer or other such tool for installation, the “tail” is flattened, creating a permanent fastening solution. We will discuss the different types of rivets and their best features.
- The blind rivet is reliable for heavy load usage. They are often used for blind holes and when they have limited access.
- Drive rivets offer a low-profile solution. It is a common type of blind rivet.
- Solid rivets are the original rivets. They are resistant to water, vibration, and other kinds of tampering, as well as most severe conditions like wind and rain.
- The split rivet is typically used for sensitive situations such as thin wood, veneers, plastic, and leather.
- Tubular and semi-tubular rivets are used for quick and easy installations.
- Threaded inserts and rivet nuts are strong and permanent options for integrating seamless fastening.
Another common application is in transportation infrastructures, such as for building bridges and overpasses. Rivets are also used in woodworking, jewelry, aerospace, and aviation for all types of projects ranging from necklace clasps to aluminum alloy construction and aircraft assembly.
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The HI-LOK Pin is widely used in the aviation industry for installation on airframes. This type of fastener is small in weight and size, easy to install, and has a controlled preload, making it the perfect choice for today’s high-performance aircraft. The HI-LOCK Pin Fasteners has been labeled the most reliable fastener by many in the aviation industry, making it every company’s first choice.
The pin is a threaded fastener that combines features of a bolt and a rivet and contains two parts: a collar and a pin. The fastener is so small it can be easily installed by a single person using power tools or even hand tools. This allows for less worker fatigue allowing for fasteners to be installed in a shorter amount of time. The weight of the HI-LOK pin is less than that of a traditional nut and bolt system, allowing for the overall airframe structure to be lighter.
These fasteners are also made to withstand high stress and high-temperature situations, making them the ideal match for aircraft adaptation over time. The HI-LOK pin fastener is available in several different head types to accommodate tension, mixed, or sheer application requirements. The pinheads are also designed to be self-aligning, allowing for optimized performance even on sloped or uneven surfaces. The HI-LOK pin is the best choice for all airframe requirements.
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The new Alcoa fastener addition has not only been beneficial but has also raised issues on the compatibility of the lightweight materials such as aluminum. It is useful because it can be used and inserted into certain fasteners but when composites are involved other fasteners need to be created.
The transition from metallic to composite has also been a problematic transition in the aircraft fastener industry because composites structures are not safe against lightning strikes. The traditional metallic aircraft is made of aluminum, it is an ideal conductor of electricity. In any case that the aircraft is struck by lightning, the energy is dispersed through the metal. Most times it is harmless and if any harm occurs only small repairs are necessary.
Alcoa’s Flite-Tite pin fastener was made to get past any situations of composite delamination. Using a stainless steel or titanium sleeve to develop an interference fit without delaminating the composite.
Since composites are more like insulators than conductors. When using aluminum structures, the aluminum is the primary path of conduction. However, when a composite structure is used the fastener becomes the primary path of conduction. Composites are also complicated to deal with because they are sensitive to damage that is caused by delamination. Delamination is the state where composites and steel go under stress. This is caused when the fastener part is pushed into the hole. This separates the composite material which does not create a good electrical connection. In the case of a lightning strike the energy will not pass through the fastener.
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During these two days of the exhibition, Fastener Fair France will supply a unique experience for industry professionals to discover significant innovations and create new business relationships. During its first exhibition to be held in France, Fastener Fair will connect the aircraft manufacturers, distributors, suppliers and end users all in the fasting and fixing industry. This will also include products and services in association with this industry. The fair is being targeted mostly towards industrial stakeholders that are seeking assembly and installation systems and manufacturing technologies for fasteners. All these mentioned requirements spread among a wide range of different sectors which includes construction, car manufacturing, aerospace, marine, civil engineering, furniture manufacturing and much more.
The screw and bolt manufacturing market in France has grown these last 7 years and continues to grow. It has reached a figure of 4.5 in 2017. In 2016, screw and bolt manufacturers based in France appreciated a favorable business environment. This was due to the face that they were able to capitalize on the dynamic growth in certain industries they work with. For example, the French automotive industry and aerospace industry both saw manufacturing and production output increase by 4%. Screw and bolt exports in France rose by 3.4% in just the first ten months of 2016.
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Once the 2000’s rolled around the company started to get recognized for their efforts and were beginning to receive awards, deals with large companies and branching off into other countries such as France and the United States.
Now the company is expanding even more and introducing a new rivet to their lineup. The Star rivet is a rather large rivet that is shaped exactly like a bright and shining star. The rivet is folded over quite a few times in order to create a space that can handle multiple points of intense pressure and it happens to create a large star shape. The rivets are used most often in projects that use large amounts of wood for the stability of plastic.
ASAP Fasteners has a dedicated and expansive array of Airbus Helicopter parts, serving customers as a one-stop shop and primary destination for product sourcing. ASAP Fasteners will ensure that your needs are addressed in the most expeditious and transparent manner, all the while offering cost-effective component solutions. If you are interested in a quote, please contact our friendly sales staff at sales@asapfasteners.com or call 1-714-705-4780.
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When thinking of screws, the safety of theft is not the first thing that comes to mind. Safety of keeping things secure, and out of reach, but locks are meant for security. Well Hafren is creating these new best forming screws that are antitheft, anti-vandalism, and anti-tampering. Not only are they creating screws, but best fasteners as well.
The fasteners and screws of Hafren have many different uses and prevent many different types on theft, vandalism, and tampering. It allows for less time being spent on manual labor as a self-drilling screw along with self-tapping, and thread forming screws.
These screws and fasteners have many different capabilities and purposes, on of the many is that they can be used to fix sheet metal to wood and other steel construction with the use of self-drillers. These self-drillers contain the same 6-lobe pin security system used on their screws and fasteners. These self-drillers allow for fast and easy installation along with repairs if and when they are needed. Hafren Self-drillers have high torque capabilities so there is no need to pre-drill holes.
Another aspect Hafren has specialized in is the thread forming screw panel which is most commonly used for fencing and automotive capabilities, the most impressive thing is that those are not the only capabilities. The triple lobed self-threading screw allows for the use of nuts to be eliminated which reduces costs, and like the self-drilling screw cuts down on labor time with installation and repairs.
The thread forming screw, used in the referred to as the Power6 is also used in security systems and has the same unique 6-lobed pin fastener and provides a higher level of security for customers.
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Lithuanian Sports are not normally known to be funded more than a state entity but have reconsidered with newest aircraft bearing parts company. Two Lithuanian Professional Rally car drivers have paired up along with their teams to reface a company known that is newly known as CRAFT Bearings. The Craft Bearings is a world renown company that has generated business in over 80 countries. Driver known as Antanas Juknevicius has been a reigning champ for rally races held in DAKAR which has earned him a spot as the new face for the newly branded company along with his co-driver, Darius Vaiciulis,.
As a professional driver he understands what it takes to win the rally races along with every aspect of the tools needed. Antanas along with CRAFT Bearings are both eager to proceed with the partnership as CRAFT Bearings unit believes that Antanas carries the correct traits they wish to project as a company.
CRAFT Bearings director, V. Rimgaila, mentions that they are extremely content with the onboarding of Antanas as he states,” Customers around the world choose us because of our well-developed worthwhile products and reliability. For this reason, we place a great amount of emphasis on experience and professionalism when we choose our partners. Antanas is the most knowledgeable Lithuanian in Dakar. His many years of experience and high achievements are the best reflection of these traits” With having the world renown tools under his belt from Craft Aircraft Bearings Set , Antanas cannot guarantee that he will win this upcoming DAKA race, but has high hopes. Before heading to the race in DAKAR they will heading to Le Harve , France right before making their way to Argentina to ensure their vehicles. The vehicle that Antanas will be using is a veteran Toyota Hilux Overdrive car that has been on the DAKAR terrane 6 times making this the 8th start for Antanas.
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Every industry continues to have a focus on improving business along with the quality of what they offer. Architecture and construction industries are no exception. One recent improvement made is the stainless-steel fasteners, specifically A4 fasteners.These A4 aircraft fasteners are a 316 grade, and an improvement from the A2, 304-grade fasteners that are still great, but no longer the best.
Many new landmarks and large buildings are being constructed with fasteners assembly because they can last for up to 40 years, which is 15 years longer than the A2. Of course, the lifespan of the fastener depends on the location and type of building it is installed on. Regardless the A4 stainless steel fasteners are still a better investment. Although more expensive up front, cheaper in the long run due to their lifespan. They have a longer life due to their ability to fight off corrosion.
The benefit of fasteners panel that last longer is more impactful than many would think. The upgrades and upkeep on an existing building are often costlier than the actual construction of the original structure. So, paying a little extra to have an original structure and parts that last longer is more beneficial for companies, and still cheaper in the overall lifespan.
Another example of industries that heavily relies on long-lasting and guaranteed parts and fasteners is the aircraft and aerospace industries. The repairs and upkeep can be costly like in construction, so having a product that may be a little more expensive, but lasts longer can be very beneficial. Aircraft and aerospace industries are among the other industries that aim to improve not only aerospace and aviation fasteners but all parts alike. Finding a reliable distributor is very important when dealing with an industry.
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Earlier this year Rivco LTD, best aircraft fasteners seller, based out of Kidderminster, England, unveiled their brand-new office for their local employees on Friday, June 16th. The new office, affectionally called Rivet House, creates a calmer more comforting vibe for each of the employees who call the workspace home.
Many people were present for the unveiling including managing director, Steve Auld and Johnathon Craven who currently resides as the general manager at Acronis Fastening Systems and Rings in nearby Telford. More notable guests were David Garner who is the sales manager for the UK and Ireland, customer service manager, Sarah Van Der Woning, and Lisa Masterson who is HSBG GTRF’s commercial manager.
Their increase in incoming business was what prompted the company’s choice to redo their preexisting Kidderminster office. Along with the revamped office space, the company also received newly branded workwear, a collection of company cars and an up to date IT system. These extra additions were added on to help their employees, located across three business and two physical offices function, not as separate entities, but as a cohesive team.
Rivco’s relationship with aircraft fastener brand, Arco Fastening Systems and Rings has been a long-lasting friendship. Rivco has been stocking HUCK branded tools and specialty fasteners for the last twenty years.
The presence of Johnathan Craven at Rivet Houses grand opening helped to solidify the friendship these two companies have forged over the past few decades. HUCK products are one of Rivcos best selling items and are a huge proponent of what keeps this friendship going.
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Well known fastener and tool manufacture, Senco has handed over the keys and complete ownership of its company to a new Japanese owner. The buyers of Senco are a well-known Japanese company named KYOCERA based out of Kyoto, Japan. The company’s plans are to expand with all the resources that SENCO has to offer. Senco is a prime resource for the Japanese company as it centers most of its marketing and their manufacturing based in the US and Europe. Although the complete owner ship has been handed over to the Japanese the name will remain attached reading: KYOCERA SENCO.
Sencos name has been in the industry from the 1948 and has been a leading supplier and manufacture of fasteners aircraft parts and power tools around the globe. Senco can be found in 40 different countries around the world.
KYOCERA has been leading aircraft fasteners part supplier in the industry more over 40 years but was not always a power tool company. They originally began as a ceramic company when they started in the year in 1959 and gradually began its journey to more powerful products. In the year 1970 the Japanese company began procuring industrial tools which involve applications of different industries such as aerospace parts, medical, woodworking etc.
Prior to the purchase of the American company, KYOCERA purchased another power tool company in the year 2011 from Europe. The European company Unimerco Group became a great addition in a similar way that SENCO has provided all their resources to help expand Kyocera. The addition of the European company created a new subsidiary called KYOCERA UNIMERCO. Unimerco will be able to provide its prolific product line to work hand in hand with Senco. Kyoceras ultimate goal is to become more profitable with it purchasing of the two new companies. The Japanese company has estimated to increase their numbers by 361million US dollars by March 2021.
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