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Tool case solution for fretting corrosion protection

The SKF anti-fretting paste LGAF 3E is a well-proven mounting paste that helps to reduce fretting corrosion in metal to metal contact areas that are subject to vibrations or small relative movements.
The new 35 gram tube is designed to be readily available in every tool case for mounting bearings or protecting other metal to metal contact areas from fretting corrosion. Since only little amounts are needed for effective protection, the 35 gram tube is sufficient for many installations. More than 25 installations of 23120 CC/W33 can be performed with a single tube.

LGAF 3E 35 grams tube box

  • Effective protections against fretting corrosion
  • Small pack size for tool cases
  • High economics in application
  • Recommended for all bearing installations
  • Usable for many other applications

 

 

 

Typical applications

  • Bearing mounting

The most common usage of LGAF 3E is for mounting bearings. Applying the anti-fretting paste in the loose fit between the bearing and the housing (or shaft) significantly reduces fretting corrosion and helps to increase the service life of the bearing, shaft and housing. LGAF 3E reduces fretting corrosion in the loose fit of bearings.
Less corrosion makes bearing dismounting easier. Reducing corrosion repair work helps to maintain a good bearing fit.

  • Heater maintenance

The contact area between the TIH heater core and the yokes needs regular maintenance to ensure long term performance. Cleaning the contact area and applying LGAF 3E help to
reduce corrosion of the contact surface in between core and yoke,
reduce noise of the heater in operation and
maintain high heater performance over time.

  • VIBRACON re-installation

SKF VIBRACON chocks are delivered with protective layer of LGAF 3E and are ready for use. After equipment re-installations where the spherical surfaces were separated and cleaned, a thin layer of LGAF 3E needs to be applied to prevent fretting corrosion and keep the chock in a good condition.


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Remanufacturing bearings

For many medium- to large-size bearings in a number of demanding industries, remanufacturing can offer considerable benefits, including lower life-cycle costs and less unwanted downtime, especially if remanufacturing is combined with other SKF services and technologies. In addition, remanufacturing can support a company’s efforts in the growing importance of sustainability issues.

AUTHOR: FRANCK PELLERIN, CLUSTER MANAGER, CENTER OF EXCELLENCE BEARINGS & UNITS SERVICES, SKF FRANCE, MONTIGNY LE BRETONNEUX, FRANCE

SKF has always recognized the importance of remanufacturing for heavy industries such as metals, mining, mineral processing and cement, pulp and paper, and marine. SKF has a large number of centres around the world that can offer remanufacturing services and is dedicated to expanding with new service centres in the future.

In many applications, bearing service life can be shorter than the calculated rating life. This is because damage to bearings can be caused by such factors as contaminants and sporadic metal-to-metal contact in the rolling contact area.

Summary
Bearing remanufacturing continues to be an important service for many demanding industrial sectors. It can offer considerable operational cost reduction and energy savings in addition to contributing to reduced total life-cycle expenditure, thanks to longer bearing service life and machine uptime.

Bearings suitable for remanufacture (fig. 1) are typically:

large-size bearings with an outside diameter of 420 mm and above, backing bearings, caster bearings, such as spherical roller bearings and CARB bearings, slewing bearings.

Fig. 1: Typical bearings suitable for remanufacture.

The remanufacturing process

Crucially, knowledge of both bearing manufacturing and the specificity of applications in which the bearing is used is important so that the right remanufacturing procedure can be applied. This ensures that the bearing is remanufactured in a manner that is compatible with the application’s requirements.

An extensive analysis of bearing damage is carried out along with careful costing of the remanufacturing. This normally involves visual inspection to determine the type and depth of the damage and measurements that include clearance, ovality, and wall-thickness variation of the rings. Additional non-destructive tests can be carried out, depending on customers’ requests or bearing specifications.

Customers are advised of the work to be carried out before a final order is made.

Besides industrial bearings remanufacturing, SKF offers remanufacturing of bearings for the railway industry (wheel and axlebox bearings), machine tool spindle remanufacturing, gearbox remanufacturing and more.

Fig. 2: SKF’s remanufacturing process.

During remanufacturing, relevant functional surfaces are remanufactured (fig. 3) and bearing components replaced, if necessary. Consequently, the potential service life of the bearing can be extended. Depending on the bearing condition, remanufacturing can take from as little as a few hours to a number of days (fig. 4). Also, depending on the amount of remanufacturing required, as much as 90 percent less energy is needed to remanufacture a bearing compared with making a new one. Taking into consideration the bearing size, complexity, condition and price, substantial cost savings can be achieved by remanufacturing.

SKF applies its latest bearing manufacturing standards, processes, equipment, quality assurance, knowledge and expertise as a foundation for its bearing remanufacturing services and applies it globally. Acceptance criteria are designed to deliver high-quality results whatever the extent of the remanufacturing carried out.

Large-size spherical roller bearing


Fig. 3: Large-size spherical roller bearing: before and after remanufacturing.

As traceability is important, SKF employs an advanced management process to register all the data of each case and applies a unique code to each asset. In this way each bearing can be tracked through its future life cycle. During the process, SKF can also offer remanufacturing to include bearing feature modifications for different or higher specifications. This can include mounting sensors, providing integrated lubrication or offering different sealing and coating solutions. SKF’s remanufacturing process also takes into account the environment through responsible cleaning of used bearings and waste handling.

Prevention of future damage
Having undergone remanufacturing, SKF customers can avoid the recurrence of damage that required the remedial work by exploiting SKF’s predictive maintenance expertise. This provides information about the status of plant machinery through various monitoring services. In addition, SKF offers root-cause failure analysis that identifies those causes and effects that impact on bearing damage and produces a comprehensive plan of corrective action to avoid future problems.

Fig. 4: Remanufacturing costs – Damage severity versus remanufacturability – bearing damage detected at an earlier stage increases remanufacturing possibility and reduces related cost.

For many industrial applications, bearing failure impacts severely on operational costs. SKF has developed solutions to help reduce the total cost of ownership of rotating equipment. The SKF Rotation for Life programme is a long-term, performance-based contract based on a monthly fee. This integrates bearing technology, damage detection, reliability and remanufacturing services, which are part of SKF’s core expertise. Based on the real operating condition of the critical assets, SKF defines key performance indicators. These are used to support a reduction in a company’s total cost of ownership of those assets by offering a single source for components, expertise and services. Savings are made partly through increased machine availability and by cutting capital outlay through optimizing the spare parts inventory and minimizing waste.

In conclusion, SKF can offer substantial benefits to end users including extended bearing service life and reduced machine downtime, resulting in lower total life-cycle costs, and less environmental impact. This is coupled with a maintained stock of replacement bearings and improved overall asset reliability.

CARB is a registered trademark of the SKF Group.

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Cooper Roller Bearings becomes SKF Cooper Split Bearings

Now an established brand within the SKF Group, Cooper Roller Bearings product ranges will henceforth be marketed as ‘SKF Cooper split bearings’.

Gothenburg, Sweden, 15 January 2018: SKF acquired Cooper Roller Bearings Co Ltd in 2013 as part of the US based Kaydon Corporation, Cooper’s parent company at the time. Following a period of consolidation within the SKF, it has now been decided that all Cooper Split Bearings ranges will be marketed under the name of SKF Cooper going forward.

SKF Cooper products will continue to complement the growing SKF portfolio of complete solutions for the marine, mining, quarrying, construction and energy sectors. In addition to the brand name change, the channels to market for SKF Cooper products, including responses to customer enquiries, product supply and after-sales support, will be handled on a global basis through local SKF sales outlets going forward.

SKF Cooper split roller bearings can be fitted, removed and inspected without having to dismantle surrounding equipment, providing savings in terms of reduced maintenance and downtime. The products include both split cylindrical roller bearings and split double row tapered roller bearings, the latter with the ability to take axial loads in either direction. Both are housed and sealed in special swivel cartridges, which are suitable for mounting in pedestal or flanged outer housings.

The cartridges have a spherical outer surface that fits into a conforming surface in the mounting unit rather like a ball and socket joint; any shaft misalignment tends to move the cartridge, seal and bearing together, maintaining the seal on an axis parallel to the shaft. This configuration allows extremely close tolerances to be maintained between the housing and the shaft, delivering a sealing performance that is recognised as one of the best in the anti-friction bearing industry.

As well as their complementary product ranges and reputations for engineering excellence, Cooper and SKF have one other thing in common: both mark 1907 as a particularly momentous year in their respective histories. 1907 was the year that Cooper’s founder, Thomas Cooper patented the world’s first split rolling element bearing, and in that same year Sven Wingquist invented the first self-aligning bearings and founded the Svenska Kullagerfabriken company – nowadays more commonly known as SKF.


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SKF delivers its largest sealed spherical roller bearing

SKF’s Gothenburg factory has produced the company’s largest sealed spherical roller bearing (SRB) to date. The ‘241/900’ SRB is 50 per cent larger and three times heavier than the previous largest SKF sealed SRB.

Gothenburg, Sweden, 4 October 2017: Destined for a Polysius Polycom 8 roller press at a large copper mine in Peru, the three-tonne 241/900 sealed SRB is dimensionally equivalent to a standard SKF non-sealed version, with inner diameter (bore) of 900mm, outer diameter of 1,420mm and width of 515mm. The seal itself consists of a rubber over-moulded steel plate with the same profile and offering the same characteristics as those currently used with existing SKF sealed SRBs.

The customer’s sealed SRB will be fitted to a horizontal shaft and will operate in extremely dusty conditions, with very fine stone dust from both the desert location itself and the grinding processes posing a major contamination risk. The roller press is a highly loaded application (C/P of 2-3) subject to frequent shock loading; the predominantly radial loads, when coupled with the high level of contamination at the site, poses a significant risk of early bearing failure. SKF’s custom made seal aims to at least double the bearing service life by reducing the risk of contamination in this application significantly.

The actual performance of the seal for this size of SRB remains to be verified in service by the customer, but the same seal design used in smaller SRB sizes has achieved a service life of at least double that of an open, non-sealed bearing. Even longer service lives of around three to five times that of a non-sealed bearing can be achieved with SKF’s ‘Three-Barrier’ bearing protection solution, which comprises premium SKF sealed SRBs housed within sealed housings containing a barrier grease.

This record-breaking sealed SRB was designed and manufactured within a tight, six-month schedule by a team led by Daniel Ortega – Project Manager, Business Development.

 


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Επέκταση γκάμας προϊόντων SKF

Το τελευταίο τρίμηνο η SKF παρουσίασε 54 νέα σετ, βελτιώνοντας έτσι ακόμη περισσότερο την κάλυψή της σε όλες τις γραμμές προϊόντων της.

  • 9 Σετ ρουλεμάν τροχού
  • 4 Σετ χρονισμού
  • 23 Σετ δυναμό
  • 8 Σετ μετάδοσης κίνησης
  • 8 σετ ανάρτησης
  • 1 Σετ ρουλεμάν συμπλέκτη
  • 1 Σετ κιβωτίου ταχυτήτων

Κάντε κλικ εδώ για να δείτε την πλήρη λίστα των νέων σετ.

Μπορείτε να βρείτε τις αναλυτικές εφαρμογές καθώς και περισσότερες πληροφορίες για τα νέα σετ αλλά και ολόκληρη τη γκάμα προϊόντων μας στον ηλεκτρονικό κατάλογο: http://webshop-cs.tecdoc.net/skf/?


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Ελεύθερες τροχαλίες SKF

Ελεύθερες τροχαλίες για τεντωτήρες εξωτερικών ιμάντων

 

Οι ελεύθερες τροχαλίες της SKF ταιριάζουν σε πολλούς αυτόματους και μηχανικούς τεντωτήρες εξωτερικού ιμάντα, όπως και σε τροχαλίες παρέκκλισης.

Πλεονεκτήματα:

Αντικατάσταση μόνο της φθαρμένης τροχαλίας και όχι ολόκληρου του τεντωτήρα

Βελτιστοποίηση του στοκ με λιγότερους κωδικούς ανταλλακτικών

Η γκάμα περιλαμβάνει 8 κωδικούς που καλύπτουν 53 τεντωτήρες εξωτερικού ιμάντα αλλά και τροχαλίες παρέκκλισης, για πολλές δημοφιλείς ευρωπαϊκές εφαρμογές.

Κατεβάστε το φυλλάδιο εδώ.


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Assured quality from approved service suppliers

Setting new standards

Assured quality from approved service suppliers

For centuries, classification societies have helped shape standards and regulations to improve the safety of ships. Vessels that live up to these requirements receive approval. Thomas Knödlseder, senior engineer at DNV GL Maritime, explains how classification societies ensure the quality of services suppliers.

Thomas Knödlseder: With ships and offshore structures, it is especially important that certain levels of quality and reliability are achieved. At DNV GL, our purpose is to safeguard life, property, and the environment. As a classification society, we check and approve the design, materials, and components of newly built vessels and carry out periodic inspections on ships in operation to verify that standards continue to be met. If they fulfill our requirements, they receive the classification certificate, which is typically valid for five years.

In recent years, the maritime industry has undergone significant change. Has this had an impact on your approval process?

Of course. We always have to adapt our rules and regulations to reflect changing practices and advances in technology. For example, as more and more ship operators implement CBM (condition-based maintenance) strategies, we need to make sure that our rules enable this method of verifying machinery condition. However, first we must make sure that it is done correctly.

Our purpose is, and always has been, to safeguard life, property, and the environment.”
Thomas Knödlseder, Senior Engineer, DNV GL – Maritime

So how does DNV GL go about doing this?

We have to ensure that the condition monitoring (CM) systems deliver accurate information. If, for example, the systems are not monitoring correctly, the crew on board a vessel might draw false conclusions from the data. This could jeopardize the reliability of a ship. For this reason, we check that the service suppliers live up to certain standards before they are permitted to work with DNV GL approved vessels.

What are the main things you look out for when assessing service suppliers?

First of all, the service supplier has to be able to carry out its services at a consistently high standard of quality. We verify that CM systems are installed properly, that they are collecting the right amount of information to form an accurate picture, and that the data is analyzed by qualified, skilled personnel. In addition, we demand that service suppliers have a continuous improvement program in place, including training. If they can meet all of these conditions, they receive certification that is valid for three years.

What does this mean for ship operators? Why should they choose approved service suppliers?

Ultimately, our services help establish mutual trust between shipping companies, operators, and suppliers. When a ship operator works with a DNV GL approved service supplier, they can rest assured knowing we have checked and verified everything in great detail, so they can rely on the information from their CM systems. And for certain applications, having properly implemented CM systems means we will remove the standard survey intervals of five years and even maker’s recommendations for periodic maintenance.

On the other hand, the service suppliers themselves also benefit from approval. During the process, we provide them with guidance on how to comply with the requirements. We’ve seen suppliers that have identified room for improvement after taking another look at their own processes and the way they deliver services. As a result, they can actually enhance the quality of their services during the process.


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GT4 European Series Northern Cup 2017

Category : Νέα

JTEKT is one of the sponsors (with Koyo brand bearings) the GT4 European Series Northern Cup 2017.

This event is one of the best race series for both Am and Pro drivers either driving in the same team or on their own. 2017 will be the 10th anniversary for this successful series again visiting Europe’s premier circuits. Sofia Car Motorsport by BADI and SIN R1 will participate for the third season in this series.

The drivers for this season are Mrs. Bianca Anton 19 years old, and she will share the car with her brother Mr. Eduard Anton 16 years old, youngest pilot from this competition, both with huge potential and an extended racing/driving background and accomplishments. They are part of BADI team in Bucharest Romania, one of Koyo’s major Distributors in Romania. The first open round took place last 31st of March in Misano (Italy). The next one will take place May 7th in UK at Brands Hatch


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SKF inaugurates large-size bearing test centre

SKF has inaugurated its newly-built Sven Wingquist Test Center in Schweinfurt, Germany, an investment totalling EUR 40 million. The center is the first in the world that is able to test large-size bearings under actual operating conditions. This allows for a more efficient development process for customers, as well as improved bearing performance and increased service life.

The Sven Wingquist Test Center has two testing rigs. One rig is designed for the testing of wind turbine main shaft arrangements. The second rig will be used for testing bearings used in other industrial sectors, including mining, construction, steel manufacturing and marine transport.
Combined with SKF’s continued development of diagnostics, condition monitoring and simulation methods, these rigs will contribute to reduced testing and product development lead-times and provide deeper insights into bearing performance.

Victoria Van Camp, CTO and President, Innovation and Business Development, says: “No other test center is capable of testing large-size bearings this accurately, under actual operating conditions, giving us and our customers a significant strategic advantage. The technologies being used here in the Sven Wingquist Test Center will help save our customers time and resources, whilst supporting their ambitions of increased reliability and service life.”

The test centre has received funding from the Bavarian Ministry of Economic Affairs, Media, Energy and Technology and the German Federal Ministry for the Environment, Nature Conservation, Construction and Reactor Safety.