SNR - Industry

1 SNR - IndustryINDUSTRYSNR: bearing expertise to optimize maintenanceMonitoring&measurementInstall ation&removalLubricationServicesBefore choosing the tools, choose the menMaintenance Services Knowledge of bearingsguarantees goodmaintenanceInfluencing productivity, safety atwork and the environment,maintenance has become of vitalimportance, especially concerningheavily loaded parts like maintenance dependsabove all on knowledge andexperience. SNR Maintenanceteams have gained this know-howthrough interventions in diverseindustrial expertise, allied with an abilityto listen to their customers, is theirmost effective Services andproducts: a broad field ofinterventions Our maintenance solutions arenever oversize and adapted to eachparticular case.

2 Our services rangecan take the form of specificinterventions or longer-termcontracts. Our products concernlubrication, the fitting/dismountingand the monitoring. Table of contentsMonitoring&measurementInstallati on&removalLubricationServices Origin of failure2 The maintenance department challenge4 Monitoring and vibration expertise7- On-site services7- Remote services9 Fitting - dismounting of bearings10 Shaft alignment10 Bearing expertise11 After-Sales Service and Guarantees11 Modular training courses12 Technical assistance and logistics13 SNR-LUB Greases17 Fitting compound25 Grease gun for bearings26 Automatic lubricator27 Cold installation Installation kit33

3 Spanner wrenches35 Sleeves37 Nuts42 Heat assisted installation Induction heaters45 Heat insulating gloves50 Removal Hydraulic extractor51 Continuous monitoring devices (On-line)55 Sensors56 Periodic monitoring devices (Off-line)57 Software57 Laser-targeting thermometer58 Calibrated feeler gauges60 INDUSTRYSNR Industry1 Establishing the cause and origin of failure to improve performanceMaintenance Services By monitoring the millions of SNR bearings available on the market, we have succeededin developing extremely precise statistics regarding causes of failure.

4 This compilation ofdata highlights a vital fact: in the event of premature failure, it is rare that the bearing itselfis the cause. In 90% of cases, failure is caused by external elements that may be classifiedin 4 main families:Incorrect or unsuitable lubrication significantlyreduces bearing service life. Lubrication isfrequently neglected due to lack of accessabilityand the user's lack of knowledge choice of lubricant, the method, the quantityto be added and the frequency of addition shouldbe carefully analyzed.

5 SNR can specify therecommended lubricant, and markets a completerange of greases suited to each type ofapplication, as well as an automatic lubricationsystem (refer to the Lubrication chapter). Inadequate lubrication (70%):Frequently, bearings are used in extremely pollutedenvironments that significantly reduce bearingservice counter these problems, SNR has developedan extremely broad range of sealing systems andcan advise which is most suited to (18%):SNR Industry3 The installation of a bearing is a key step that willeffect the bearing's service fact, bearings that are incorrectly installed willbecome worn very quickly.

6 The main causes areas follows: improper installation procedures, contamination during installation, incorrect preparation of mating surfaces:shafts and housings outside tolerance limits,faulty lubricant access, may cause abnormal noise, in the shortterm it will cause fatigue of bearing can either perform installation and removaloperations, or provide you with tools and devicesthat will facilitate these operations and helpensure that they are correctly performed (refer tothe Installation & removal chapter, Serviceschapter).

7 Improper installation (10%):Bearings support loads and must at the sametime rotate, conditions which cause fatigue ofcritical components. Fatigue, or spalling, ofrolling elements and raceways is the normalmode of bearing failure, but can be acceleratedby a number of faults. By using our monitoring methods you will beable to identify the first signs of spalling andschedule suitable maintenance operations (referto the Monitoring & measurement chapter,Services chapter).Fatigue (2%):INDUSTRYThe maintenance department challenge:To ensure production tool availabilitywhen needed at optimised costMaintenance Services Currently operating in Just In Time mode, the Industry is continuously compelled toreduce production costs while improving the quality of manufactured products.

8 Hence,the quest to optimise the availability of production means and to decrease maintenanceand repair costs has become crucial."Better safe than sorry" is a good summary of current maintenance philosophy whichhas had to evolve in order to meet these requirements. Increasingly, it is vital that the"maintenance policy" to be adopted is identified upstream, frequently with regard tomachine constraints. Curative or corrective maintenance: after failureThis involves waiting for a failure to occur before determining the problem and carrying out requires excessively large intervention teams in order to ensure fast reaction times, withoutallowing company control equipment availability.

9 Failure usually generates significant productionlosses and repair costs. Preventive: routine maintenanceRoutine maintenance, performed at regular intervals, engenders an increase in installation reliability butdoes not prevent does not take wear of replaced parts into consideration and involves extraction and fitting that have anegative impact on service life and equipment reliability. It also means that machines are out of use for theduration of maintenance. Lastly, the large stocks of spares and labour needed to perform routinemaintenance constitute as significant cost.

10 According to some studies, 30% of amounts invested inpreventive maintenance are wasted. On-condition maintenance The aim of on-condition maintenance is to predict failures without dismounting machines or stoppingproduction. It involves defining parameters which characterise the equipments state of health andperiodically monitoring changes of said parameters in order to schedule corrective interventions at theoptimum most commonly used techniques in the Industry are vibration monitoring, tracking of operatingparameters, analysis of lubricants and IR thermography.