Nord Lock Bolted - Hobson
A MAGAZINE ABOUT OPTIMISING BOLT SECURINGW W W.BOLTED.COM # 1 2014BOLTEDISSUE # 10T OP T I PS F OR BOLT INGGET THE KNOWLEDGEFROM THE EXPERTSTALL ORDERBRIGHT SPARKPOWER GENERATIONSECURINGBOLTS ONTOKYO SKYTREECAR ENTHUSIASTCHOOSESNORD-LOCKSUPERBOLTPART OF HYDROFUTURE
Your trusted global partnerin bolting solutionsThe Nord-Lock Group offers cutting edge boltingtechnologies, all designed and developed in-house. Ourproducts are well known in the market and hold a vastamount of certificates and approvals. Through Nord-LockPerformance Services we add expertise knowledge to anyproject and make sure that your bolting application pays backmultiple times.Our mission is to safeguard human lives and customerinvestments. We look forward to taking on yourtoughest challenge!www.nord-lock.comScan to see how Nord-Lockspeaks about safety.
bolted # 1 2014About optimising bolt securing – a customer magazine from Nord-LockA MAGAZINE ABOUT OPTIMISING BOLT SECURINGW W W.BOLTED.COM # 1 2014BOLTEDISSUE # 10T OP T I PS F OR BOLT INGGET THE KNOWLEDGEFROM THE EXPERTSTALL ORDERBRIGHT SPARKPOWER GENERATIONSECURINGBOLTS ONTOKYO SKYTREECAR ENTHUSIASTCHOOSESNORD-LOCKSUPERBOLTPART OF HYDROFUTUREBolted magazine is published by Nord-Lockand strives to increase knowledge about boltassemblies. The Nord-Lock Group is a worldleader in bolt securing systems and offersa wide product portfolio, including wedgelocking technology and Superbolt tensioners.These unique solutions withstand vibrationand dynamic loads. For further informationvisit www.nord-lock.comBolted is published twice a year in English,German, Japanese, French, Chinese, Swedish& Finnish. It is free to customers of NordLock worldwide. Published by Spoon inGothenburg, Sweden, www.spoon.seEDITOR-IN-CHIEF:Carin Esbergcarin.esberg@nord-lock.comCO-EDITORS:Ewa Sewerynekewa.sewerynek@nord-lock.comJason Milburnjason.milburn@nord-lock.comEDITORIAL MANAGER:Susanne råkbolaget www.sprakbolaget.sePREPRESS:SpoonCOVER ILLUSTRATION:Ten issues of bolting news and solutionsIi n th e news recently I heard aboutan appeal to the Swedish Supreme Courtregarding a trademark infringementcase. It involved counterfeit copies of SKFbearings and the prosecutor demanded that thedefendant’s fine be increased or even changedto imprisonment. Their argument was thatthe copied goods were not only damaging to abrand’s reputation but also exposed customersto increased risks and put lives in danger. Theprosecutor points out that using counterfeitproducts in critical mechanical applications in,for example, the nuclear energy industry, therailway industry and the aircraft industry, isan unwelcome and serious danger. A brand, inthis instance SKF, serves as a guarantee, andcustomers buying that product expect a certainlevel of quality, reliability and durability. Theprosecutor has suggested that the outcomeshould serve as an example in similar cases –when customers unknowingly receive copiesthrough distribution, or third parties and areexposed to huge risks. It is an interesting case tofollow and certainly relevant to anyone sourcingvital mechanical components.And what has Nord-Lock been up to? Wecontinue to concentrate on a bright future. TheGroup has recently welcomed a new CEO andwe are excited about the direction we are moving in. Further improving our product development and continuing to deliver world-classquality products allows us to serve you in thebest possible way (see interview with Ola Ringdahl on page 18).As always, we have a lot of exciting newstories covered in this issue that will be of tremendous interest to you! To mention a few, wevisit the hydropower plant in Laxede, Sweden,when Andritz Hydro AB replaces the runnersof the turbines. You can read more on page 12.Additionally you can read how we helped MANDiesel with coherence in their design processes(page 18). Other interesting stories in this issueincludes Nucor, one of the world’s biggest steelproducers (page 6), and an interview with Gordon Foat on electric cars and the environment(page 15).This Bolted actually marksa small anniversary, our tenthissue! To celebrate it, we havegathered our ten best boltingtips. We do hope you find afew good ones!CARIN ESBERGGLOBAL MARKETINGMANAGERKen NissPlease note that unsolicited manuscripts arenot accepted. Material in this publicationmay only be reproduced with permission.Requests for permission should be submittedto the Editorial Managersusanne.magnusson@spoon.se Editorialmaterial and opinions expressed in Bolted donot necessarily reflect the views of Nord-Lockor the publisher.081215Feel free to contact us with any comments:bolted@spoon.sePrinted in Sweden by VTT Grafiska. Printedon UPM Finesse Gloss 100 gram andMaxigloss 200 gram.Bolted is issued for informational purposes.The information provided is of a generalnature and should not be treated as adviceor be relied upon for making decisions orfor use in a specific matter. Any use of theinformation provided is at the user’s sole riskand Nord-Lock shall not be liable for anydirect, indirect, incidental or consequentialdamage arising out of the use of theinformation made available in Bolted.CONTENTS08Top ten tipsTo celebrate the tenth issue of Bolted magazine,we have compiled our top ten bolting tips for improving bolting security.12The challengeAndritz Hydro AB have taken on the task of refurbishing turbines at a large hydropower plant innorthern Sweden.0407SECURED BY THE NORD-LOCK GROUPTHE EXPERTS15Electric rally carsGordon Foat, director and founder of GreenMotor Sport, explains how his company developedan electric car for a rally race.16Reaching new heightsOver 10,000 Nord-Lock washers have been used inthe construction of the Tokyo Skytree – the world’stallest tower.1719BOLTING NEWSTHE COMPARISONBOLTED # 1 20143
secured by the NORD-LOCK groupWORDS: NIC TOWNSEND & ADRIAN MILLERICKSPREAD THE WORDBromma spreaders are found at almostall the world’s top ports, and each isfitted with hundreds of Nord-Lockwashers.WHAT A LIFT!PRODUCT:STS45E TWIN-LIFTALL-ELECTRIC SPREADERWEIGHT:LENGTH:LIFTING CAPACITY:CUSTOMER:11.7 TONNES51 TONNES6.06 METRESBROMMAWHEN ENORMOUS 35-tonne containers are beingmaneuvered into place at the world’s major portsequipment reliability is paramount. The giantcranes must work under tight constraints and withexacting precision.That’s why Nord-Lock and cranespreader manufacturer Bromma are the perfectmatch. The quality solutions Nord-Lock providesfor Sweden-based Bromma help the companymaintain its dominant market position, selling morespreaders than all its competitors combined.Bromma’s spreaders, which are attached ontocranes for lifting heavy loads, have been deliveredto more than 500 terminals in more than 90countries on six continents – in fact, they areinstalled at no fewer than 97 of the world’s top 100ports. More than 9,000 are in operation today.Safety is critical in this tough and demandingenvironment. Huge loads put immense pressure onthe spreaders, which are traveling at great heights.Hundreds of Nord-Lock washers are used at crucialbolted joints on every Bromma spreader, ensuringthe safe transfer of containers from ship to shore.The safety and ease of use of Nord-Lockwashers help bolster Bromma’s reputation for theexceptional quality and reliability of its spreaders,and keep them performing optimally over year afteryear of punishing dockside service.4BOLTED # 1 2014
RIGHT ON TARGETPRODUCT:BIATHLON TARGETTARGET MATERIAL:HARD WEAR PLATESHOOTING DISTANCE:50 METRESORIGINALLY A FORM of military training, the winter sport ofBiathlon combines cross-country skiing and rifle shooting and isan immensely challenging event. To take part, participants musthave the stamina and endurance to ski long distances at a rapidpace, while also having enough composure and skill to accuratelyshoot small targets from 50 metres.Biathlon can also be demanding for event organisers, withcompetition sites covering large areas in difficult conditions. Also,all of the equipment must be in perfect working order.For over thirty years, Biathlon Target System Kurvinen hasbeen a world-class pioneer in biathlon target and range systemsand has exported its products to over 30 countries. During acompetition, Kurvinen targets will be continuously shot at andCUSTOMER:BIATHLON TARGET SYSTEM KURVINENsubjected to thousands of hits. Yet despite the pressure, theymust maintain their strength as it only takes one faulty target toruin a whole competition.For the past year, Biathlon Target System Kurvinen has beenusing Nord-Lock X-ser ies washers to secure all critical connections on its targets. Previously, the company had been usingthread-locking fluid. However, this did not offer enough flexibilitywhen adjustments to the targets needed to be made, especiallyin cold weather.The X-series washers, on the other hand, can be removedand reapplied quickly and easily, despite freezing conditions. Andnow Biathlon Target System Kurvinen uses them on all itstargets.SURE SHOTA close-up of abiathlon target madeby Biathlon TargetSystem Kurvinenwhich uses Nord-LockX-series washers.BOLTED # 1 20145
secured bysecuredbyNORD-LOCKthe NORD-LOCK groupNO TIME FOR DOWNTIMECUSTOMER:NAME OF STEEL MILL:PRODUCTION:ANNUAL CAPACITY OF THE ROLLING MILL:NUCOR STEELNUCOR BERKELEYSTRUCTURAL STEEL OVER 635,000 TONNESSTEEL TEMPERATURE:RANGING UPWARDS OF 1,191 CELSIUSEVERY YEAR NUCOR produces over 21 million tonnes ofHEAVY METALThe use of Superbolt tensionersleads to improved ergonomicsand greater workplace safetyfor Nucor’s workers.steel, making it the biggest steel producer in North Americaand one of the biggest in the world. Since most of the steelcomes from recycled scrap metal, which would otherwisebe left to rust and decay, Nucor is also one of the world’slargest recyclers.In order to produce this much steel, Nucor’s minimillsare continuously in operation, melting down and recastingscrap metal. Despite the harsh conditions and extreme temperatures, everything needs to be in perfect working order.When dealing with a commodity as valuable as steel, anydowntime is costly.Currently, Nucor uses Superbolt multi-jackbolt tensionersin two applications on its steel mills, resulting in improvedsafety and reliability, as well as contributing to more ergonomic working environment conditions for its workers.Firstly, Superbolt MJTs are used to secure the rolls to theroll chocks. Compared to torque tightened nuts, applyingthe necessary torque is significantly easier as it can beachieved using standard hand tools, thus eliminating thestrain when assembling and disassembling equipment.Secondly, the tensioners also secure the mill’s stand tothe transport cart used in the production process. Originally,this was secured using hydraulic nuts, which were cumbersome, unreliable and thus a safety hazard for employees.However, since switching to Superbolt MJTs, the connectionto the cart is now safe and reliable.TURNING WATERINTO POWERPRODUCT:HYDROELECTRIC TURBINERUNNER WEIGHT:1,225 KGOUTPUT:5,150 KWCUSTOMER:CANYON HYDROFOR OVER 35 YEARS , Canyon Hydro has beendelivering hydro-electric systems to customersall over the world, and has built up a reputationfor efficient designs, quality components andcomprehensive support throughout the system’slifespan. Each of Canyon Hydro’s turbines is individually designed to best meet the customer’sneeds and work most efficiently at their chosensite, ensuring customers always extract as muchpower from the water as possible.Canyon Hydro is continuously seeking outthe highest quality components and currentlyuses Superbolt tensioners to secure the turbine’s Pelton runners – an absolutely critical6BOLTED # 1 2014WATER TIGHTUsing Superbolt tensionerson its turbines’ Peltonrunners brings CanyonHydro multiple benefits.connection, where the consequences of anybolt loosening would be catastrophic. Previously, Canyon Hydro has used fitted bolts.However, it switched to Superbolt tensionersas they are reusable and easy to reapply whenreplacing the runner. Superbolt tensioners alsooffer easy and accurate control of clampingforce.
THE EXPERTSHIDENORI ARAKISCOTT WHIPKEYFIELD APPLICATIONENGINEERMECHANICALENGINEEREmail your questions about bolt securing to experts@nord-lock.comASK THE EXPERTSDo you have a question about bolt securing? Put the Nord-Lock experts to the test.Clamp load (kN)New preloadOriginal preloadPrescribedtorqueTorque (Nm)Low deviation in achieved clamp load is essential to obtain control of the clampload and to utilise the full capacity of the bolt. Torque/clamp load test: lubricated condition (blue), dry conditions (orange). Preload levels can vary significantly with the introduction of lubrication. Before lubricating it must be checkedthat the bolts and the clamped parts can withstand the higher load.Effects of lubricationwhen reusing fastenersQ: What happens to preload in thejoint during reuse?A: It is common in many applicationsto reuse the same nuts and bolts aslong as they are in good conditionafter operation. What happens tothe joint preload during reuse is, however, not always considered.During tightening, metal facesbetween male and female threads,as well as between the bolt head/nut and substrate, grind against eachother causing wear to occur. Theresult is higher and more scatteredfriction.Friction scatter is inherent in everybolted joint upon each installationand can be quite large when installing without any lubrication. Whenfasteners are reused and tightenedto a specific torque, more of theapplied torque is required to overcome the friction and less is utilised toobtain the required preload. For eachsubsequent reuse the preload becomes lower and more inaccurate. Thiscan cause issues when the designerhas specified a preload range for theapplication to maintain sufficientclamp force to overcome the external forces on those joints. Finally,the preload may not be sufficient towithstand the working load appliedto the joint, which subsequently fails.By lubricating the fastener beforeevery use, not only can friction be reduced to improve torque-to-load ratio, friction scatter can also be reduced to improve preload accuracy. Thegraph here illustrates the torque-toload behaviour between a dry installation and a lubricated installation.While the preload scatter at a giventorque is quite random, you can influence the variability of that scatterby this simple modification.The prescriptions of the manufacturer regarding lubrication havepriority and must be followed. It maybe necessary to reduce the torqueto avoid damage to the bolt or theclamped parts. HASuperbolt: your flexible friendQ: How does the added flexibility of Superbolt improve thebolted joint?A: In normal bolted joints, thestress concentration of loads onthe first 1-2 threads is one of themain reasons why a bolted jointfails. With a joint utilizing Superbolt multi-jackbolt tensioners, asthe jackbolts are torqued to stretchthe stud/bolt, the tensioner bodyradially flexes in at the top andflexes out at the bottom. This flexing action transfers the load fromthe first few threads and distributes the load evenly throughoutthe entire engaged thread lengthbetween the tensioner and stud/bolt. This simple flexing actiondramatically increases the strengthof the joint by reducing the stressconcentrations on the first coupleof threads. In addition, this radialflexing action combined with axialflexing results in added elasticityin the joint. In a typical boltedjoint, the average clamp length ofthe joint is around 2 to 5 threaddiameters in length. The combined flexing in the MJT creates ahigher load point, which increasesthe clamp length of the joint byas much as 2-3 thread diameters. It can be concluded that theRadialAxial(a)(b)Schematic of
NORD-LOCK BRIGHT SPARK ISSUE # 10 SECURING BOLTS ON TOKYO SKYTREE TALL ORDER SUPERBOLT PART OF HYDRO FUTURE POWER GENERATION GET THE KNOWLEDGE FROM THE EXPERTS T O P T T I P S FO R B O L I N G. Your trusted global partner in bolting solutions www.nord-lock.com Sc
NORD DRIVESYSTEMS roup 2 www.nord.com Complete drive solutions from a single source NORD DRIVESYSTEMS NORD Delivers NORD offers first-class customer service and support along with full-featured drive solutions that can tackle the toughest requirements. All components are carefully selected and precisely configured to meet your exact specifications.
the Nord-Lock X-series bolt securing system. There are two main reasons why Nord-Lock prod-ucts were a perfect fit for this project. Severe vibra-tion from rattling carriages on a high-speed train can lead to bolt loosening, but not when used with Nord-Lock X-series washers. The wedge-effec
connections. An overview of the current methods used to analyze bolted joint connections is given. Several methods for the design and analysis of bolted joint connections are presented. Guidance is provided for general bolted joint design, computation of preload uncertainty and preload loss, and the calculation of the bolted joint factor of safety.
15 'Nord Stream 2 eyes operations before year-end as pipelaying completed', S&P Global Platts, 7 September 2021. 16 'Gazprom could supply 5.6 bcm of gas by Nord Stream 2 pipeline in 2021', Interfax, 19 August 2021. 17 Nord Stream 2, 'The first Nord Stream 2 string filled with technical gas', press release, 18 October 2021. 18 Gas .
Modelos de Stage 2 O NORD Stage 2 conta com 3 modelos: o Stage 2 HA88 e o Stage 2 HA76 contam com teclas tipo Hammer Action (simulação de piano). Já o Stage 2 SW73 possui um teclado de 73 teclas semi-pesadas. Fora o tipo de teclas, os teclados são semelhantes em todas as outras capacidades e recursos. Itens inclusos Nord Stage 2
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Nord-Lock Group New global R&D center To consolidate its expertise, Nord-Lock Group opened a research and develop-ment (R&D) technical center in 2011. Based near Lyon, France, this global center sets out to support application engineers working in the field throughout the world
ASTM E 989-06 (2012), Classification for Determination of Impact Insulation Class (IIC) ASTM E 2235-04 (2012) Standard Test Method for Determination of Decay Rates for Use in Sound Insulation Test Methods. Test Procedure. All testing was conducted in the VT test chambers at Intertek-ATI located in York, Pennsylvania. The microphones were calibrated before conducting the tests. The airborne .
