23
Moltenmetalsplash
STM524Moltenmetalsplashtester
Protective productsoften need to protectagainst theeffectsofimpactfrommolten metal
droplets.Safetystandards,suchasISO11611andENISO20349,havebeendevelopedto
assessgarmentswornbypersonnelcarryingoutweldingandcuttingoperations,againstthese
effects.
Assessmentofproductsbeingsubjectedtosmallquantitiesofmoltenmetal–typicalofthat
producedduringwelding–iscarriedoutusingarigincorporatinganoxyacetylenetorchto
projectmoltenmetaldropsontoavertically-orientedtestspecimenasdetailedinEN348.
Aweldingrodisfedautomaticallytothetorchforcontinuousmeltingandthebehaviourof
materialsischaracterisedbythenumberofmoltendropssufficienttocausea40°Ctemperature
risebehindthespecimen.Theabilityofthedropstoʻrunoffʼthematerial,ratherthanstick,is
criticaltogoodperformance.
Althoughthistestissuitablefortestingweldersʼclothing,glovesandfootwear,itisnotintended
tosimulatealltheconditionsinwhichsplashesofmoltenmetalmaycomeintocontactwith
protectivematerials.
Asastandardtest,itgivesanindicationofmaterialperformanceandisgenerallyusedwith
otherteststoprovideamorecompletepictureofsuitabilityforuse.
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24
Ozonechambers
SATRAozonetestingtechnologyhasevolvedasaresultofmorethan30yearsofexperience.State-
of-the-arttechnologyandconstructiontechniqueshavebeencombinedwithexpertisetoproducea
reliable,accurate,fullyautomated,labourandcost-savingunitwhichistrulyenvironmentallysafe.
Anintegralclosedloopair-ozonesystemensuresthathazardousozonegasiscontainedinternally
–eliminatingtheneedtoprovideadditionalexternalventingandfilteringofthespentgases.
Theheavydutyaluminiumexposurechamberhasananti-corrosiveinteriorandiscompletewith
rackingsystemtoacceptsample-mountingapparatus.Arangeofstaticanddynamicsampleholders
tointernationalstandardsisavailable.Accessisviaadouble-glazed,airtightandsafetyinterlocked
door.Entrytothetestareaispreventeduntiltheinteriorenvironmentrevertstosafeambientlevels.
Exteriorlightingcanbeexcludedfromthetestareaviaashade,whiletheinteriorcanbelitbythe
integraltestinspectionlamp.
Controlsanddigitaldisplaysarelogicallylaidoutonacontrolpanelandreflectthesimplicityof
operationrequiredtosetupatestroutine.Theonlyrequirementistosettheozoneconcentration,
temperature,airflow,relativehumidity(model903chamberonly),teststartandfinishtime.
Theozoneconcentrationisvariablefrom25-500partsperhundredmillion(pphm)–25-2,000pphm
option– andisautomaticallycontrolledand monitored.The setconcentration and monitored
concentrationaredigitallydisplayed,withthemonitoredconcentrationsimultaneouslyoutputtoPC
(viaCalcommsgraphicalsoftware).
Ozonedeliveryaccuracyof±5percentnominalfullscaledelivery(FSD)orbetter,typically±2pphm
in50pphm,measuredunderstableabsorptionconditions.Typicalrecoverytimesaftersample
insertion:achieves10percentofsetvaluewithin15minutes.
OzonegenerationisviaUVozonelampswithamaximumozonegeneratedoutputof200pphmat
250litres/min,andthereisahighozoneoptionof2,000pphm.Theozonisedairflowof40-440
litres/minisinfinitelyvariable,allowingamaximumofthreeairchangesperminuteandaneffective
velocityof3.3-33.3mm/sec.Theinternalcirculationfancanbeswitchedontogive600mm/sec(2
feet/sec)accordingtoASTMD1149.Ozoneconcentrationmeasurementaccuracyis±2pphm.
Controlaccuracyis4percentofsetpoint(±2pphmat50pphm).
Thetesttimerprovidesdigitalprogrammingofuptosevendays,withteststartandteststop.
HTE703
Temperaturerangeoptionsformodel703:0-70°C.*10-70°C.(Ambient+5)°C-70°C.
*Thetestingofrubberatlowtemperaturesdownto0°Ciswelldocumented,andconclusionsfrom
experimentsundertakenusingSATRAtestchambers,whicharecapableofachievingsuchlow
temperatures,mayhaveanimportantbearingonthefuturedevelopmentofozonetestmethods.
Temperaturecontrolaccuracy:±1°Cat40°Cand±2°Cat70°C.Typicaltemperatureandozone
recoveryperiodfollowingsampleinsertionis<10percentofsetpointafter15minutesand4percent
after30minutes(coldstarttimeswillvary).
Electricalsupply220-240V/singlephase/50-60Hzratedat1kVAsystem,unaffectedbyvariationsof
10percentfromnormal.
HTE903
Temperaturerangeformodel903:0-70°C.Allrangesareautomaticallycontrolledbyasolidstate
digitalproportionalcontroller,temperaturedigitallydisplayedandsimultaneouslyoutputtoaPC(via
Calcommsgraphicalsoftware).
Relativehumidity(RH)controlformodel903:Range50percentto80percentRHoverexposure
chambertemperaturerangeof23-40°C.Controlaccuracyof±5percentRHisachievedatconstant
temperature.
Watersupply:Maximumtemperature15°C.Minimumpressure2bar.Maximumflowrequired80
litres/hour.Inareasofhardwater,ade-calcinatorshouldbeused,andwhereamaximumwater
temperatureof15°Ccannotbemaintained,arecirculationchillersystemshouldbeemployed.
Electricalsupply220–240V/singlephase/50-60Hzratedat3kVAsystemunaffectedbyvariationsof
10percentfromnormal.
HTE703/903Ozonetestchambers
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25
Permeability
ThisisapreferredSATRAtestandunlikemanyothermethodsitattemptstosimulatethe
environmentwithin a shoe,that is100%relative humidityatfoottemperature.Aswell as
measuringtheamountofmoisturetransmittedthroughthematerial,thequantityofmoisture
absorbedbytheuppercan also bedetermined.Thisisimportantbecause althoughsome
materialsmaybeimpermeable,theabilitytoabsorbmoisturemeansthatthefootwillfeeldry
tothewearer.Themoisturecandesorbfromthematerialbyevaporationoncetheshoeisoff
thefoot,forexample,overnight.
Anassemblyofdiscsofoutermaterial,lining(ifusedinthefootwear)andastandardhose
(sock)fabricisclampedandsealedacrossthetopofaplasticpotcontainingdistilledwater.The
waterinsidethepotismaintainedatatemperatureof32°Cbyrestingthepotinatemperature-
controlledwaterbath.Theatmosphereoutsidethepotismaintainedbycarryingoutthetestin
aconditionedroomandmaintainingaflowofairacrossthetopofthepotataspeedequivalent
toabriskwalkingpace.Iftheouterispermeable,watervapourpassesthroughthecottonhose
andthetestmaterialinthesamewaythatperspirationwouldinashoe.
Thepermeabilityofthematerialisdeterminedbymeasuringtheweightlossoftheassemblyat
intervalsthroughoutasix-hourperiod.Careisneededduringthetesttoavoidsplashingthe
reverseofthetestsamplewiththewaterinsidethepotandtoensurethattheoutersurfaceof
the testpotisthoroughlydried afteritisremoved fromthewaterbath forweighing.The
absorptionoftheuppermaterial,liningandthestandardcottonhosearemeasuredbyweighing
eachdiscatthestartandendoftest.
STM175SATRApermeabilityandabsorptiontest
Thisdevicedeterminestheamountofwatervapouramaterialwilltransmitthroughitsstructure
inaspecifiedtime.Thetestismainlyapplicabletoleathersandtextilesusedinfootwearuppers
andclothingwhereitgivesameasureoftheabilitytoremoveperspirationfromthesurfaceof
thewearerʼsskin.
TheSATRAmachinehassixseparateteststationsonarotarytableandeachonehasasample
holder.Silicageldesiccantisplacedintheholderandthetestmaterialisplacedovertheneck
oftheholderandsecuredbyascrewtop.Afterweighingeachholder,completewithsilicagel
andsamplematerial,theholdersareplacedandlockedintotherotarymechanism.After7-8
hoursthecompleteholderisweighedagainandthegainisusedtodeterminethedegreeof
permeability.Itisessentialthattheentireoperationiscarriedoutinaconditionedatmosphere.
InadditiontothestandardequipmentsuppliedwiththeSTM473,thereisabuilt-intimerto
recordthenumberofhoursthattestinghasbeencarriedout.
STM473Watervapourpermeability
TheSTD478watervapourabsorptiontestapparatusmeasuresamaterialʼsaffinitytoabsorb
watervapour.Atestspecimenisclampedbetweentheopenendofatestpot(containinga
specifiedvolumeofwater)andanimpermeableseal.Thepotisthenstoredataspecified
temperatureforasettime,afterwhichthechangeinmassofthespecimenisdetermined.
TheSTD478testapparatusconsistsofsixtestpotseachhavinganinternaldiameterof35mm
andavolumeof100cm3,aremovablelidwhichcanbesecurelyclampedovertheopenendof
thepotandanimpermeablesealheldovertheendofthepotbythelid.
InadditiontotheSTD478apparatus,alaboratorybalanceandastopwatcharenecessaryto
determinewatervapourabsorption(availablefromSATRA).
STD478Watervapourabsorption
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26
Pinchandgrip
Ithaslong beenrecognised thatgoodglovegrip isanimportant
considerationforgloveusers,satisfactoryperformanceandsafety
canbecompromisedbygloveswithpoorgripcharacteristics.
Historically, glove standards have been primarily aimed at the
protectivepropertiesoftheglovesoratbasicdexteritytesting.These
twonewmachinesaredesignedtofillthisgapinthetestingprotocol
andhavebeendesignedwithinputfromwithinthegloveindustry.
TheSTD620pinchtesterisdesignedtotestperformanceofthe
fingerandthumbʻpinchgripʼelementofthegloves,whiletheSTD
621griptesterisdesignedtotesttheperformanceofthewholehand
grip.Bothmachinesutiliseloadcellstorecordforcedata,andboth
machinesaresuitablefortestingawiderangeofglovesfromfine
textileandlatextypeproductsuptoheavydutyindustrialgloves.
Testingcanbeundertakenonbothcleanandcontaminatedgloves
andbycombiningthetwodifferenttestmethodsanoverallresultfor
wholeglovegripcanbeobtained.
STD620/STD621Glovepinchandgriptests
STD621
STD620
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27
Pipiness
Thisisawidely-usedreferencescaleformeasuringthewrinklingofthegrainofleatherorthe
topsurfaceofasyntheticmaterialwhenfoldedinwardstoastandardcurvature
Itconsistsofagradedselectionofreplicasofleathernumberedonetoeightwithdifferent
amountsofpipinessandamandrelforbendingthesampletothesameradiusasthescale.
Byusingthenumberedscale,amoreobjectiveevaluationcanbemadeofthepipinessofa
material.
STD174Break/pipinessscale
TheplastimeteristhestandardSATRAtestmethodforassessingthesettingpropertiesof
leather.Itisalsousedtotestnewsyntheticuppermaterialsandchecktheperformanceofheat
settingmachinesbyusingasampleofmaterialofknownheatsettingproperties.
Adiscofmaterialtobetestediscementedtoabrassringandthenplacedintheplastimeterʼs
clampinghead.Itisthendeformedbyforcingintoitanon-metallicdome.Thissimulateslasting
andiscontrolledbymeasuringtheheightoftheformeddomeofmaterialwithamicrometer.The
deformationgivesanareaincreaseofaround15%.
Whileitisinthestrainedposition,thedomeplastimetercontainingthesampleispassedthrough
theheatsettingmachine.Aftertreatment,thedomeisremovedandthecapheightofthedome,
shapedinthematerial,ismeasuredatvarioustimes.Fromthis,thedomeareaiscalculatedand
theproportionoftheareaincreaseretainedistheʻplasticityʼorʻsetʼofthematerial.
STD449Lowprofileplastimeter
Resilience
Plastimeter
TheSTD645isasturdybench-mountedinstrumentdesignedtomeettherequirementsofthe
rubberindustry.
Reboundresilience(elasticity)facilitatesasimplemethodofmeasuringdampingproperties
andiscommonlyusedinconjunctionwithhardnesstestingforbasicqualitycontrol.
Thesampleislocatedagainstapolishedanvilandsecuredbyspringclips.Adjustmentcanbe
made toaccommodatedifferencesinsamplethickness.Thependulumisreleasedfroma
horizontalpositionandstrikesthesampleataverticalpoint.Itsreboundheightisdisplayed
digitallyasapercentageofitsdistancefromthehorizontalstartposition.
STD645Resiliencetester
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28
Rubfastness
Thesemachinesaredesignedtocarryoutarubfastnesstestonthesurfaceofleathertodetermine
theamountofʻmarringʼoftheleathersurfaceorthefinishandtoassesstheamountofcolourtransfer
fromthesampletotherubbingpad.
Thetestcanbecarriedoutunderdryorwetconditionsbyusingadryrubbingpad–orpre-wetting
therubbingpadindistilledwaterorasweatsolutionpriortotesting.Thesamemachinecanalsobe
usedtoassesstheabrasionresistanceofinsoleboards.ThistestiscoveredbyVESLIC–C4500and
IUP450.
Thetestingmachinesaresuitableforawiderangeofteststhatrequireaʼtoandfroʼmovementona
materialsurface.Therubbingelement,numberofcycles,loadandtemperaturecanbeadjustedto
suitthetestmaterialrequirements.
Therearetwomodels:asingle(STM421)andatwo-station(STM643B)machine.Thelatteralsohas
thebenefitofhavingonestationheatedforironingtests.Thistestisusedtodeterminethereaction
oftheleathersurfacetotheapplicationofheatandpressureparticularlywhenexperiencedduring
ʻironingʼbutalsowhenassociatedwiththenormallastingprocess.Thermoplastic-basedfinishesare
particularlysusceptibletodamagethroughironing.Theironingcharacteristicsoftheleathercanbe
influencedbytheadditionofagentsinthefinishwhichhelpthemtoachievealeathersurface
favourabletoironing.Ametalfootisprovidedwiththemachinetofacilitatetheironingprocess.This
testiscoveredbyVESLIC–C4580.
Theabrasioneffectofsolingmaterialsonuppermaterialscanalsobetestedonthisequipment.Using
asmallprofiledrubberpadinplaceofthefeltpad,samplescanbetestedforthiseffect.Abrasionof
theupperbythesolingmaterialcanbecausedinnormalwearparticularlywhenwearerscrosstheir
legsandthesoleofonefootrestsontheupperoftheotherfoot.ThistestiscoveredbyVESLIC–
C4505.
Theabilitytopre-tensionthetestsampleisafeatureofbothmodels.Thisisparticularlyusefulwhen
testingstretchyleathersandisarequirementoftheabrasiontestunderC4580.
Operationissimple.Thesampleisplacedonthetestsurfaceandclampedusingtheclampsprovided.
Pre-tensioningcanbeeffectedbyadjustmentoftheknoborscrewinconjunctionwiththepercentage
scaleengravedonthetestingtable.Apre-determiningcounterisfittedtothemachine,causingitto
stopwhenthepre-determinedcountisreached.Thesquarefeltpad(STM421P)isinsertedinthe
machinedholderontheendoftherubbingheadwhichisthenloweredtothesurfaceofthetest
sampleandthemachineswitchedon.Thematerialsurfaceandtherubbingpadareinspectedvisually,
inthecaseofcolourtransfer,thewool-feltrubbingpadisevaluatedusingthegreyscaleprovided
witheachmachine.
Aninitialsupplyofwool-feltpadsisincludedwitheachmachine.
TheSTM643BistheonlyequipmentapprovedandpromotedbyVESLIC.
STM643B/STM421Rubfastnesstester
STM643B
STM421
Thismachinedeterminesthefastnessofthefinishofaleatherupper,leatherlining,synthetic
upperorliningandfibreboard.Rubbingcanbecarriedoutindryorwetconditions.Thelatter
canbewater,solventsinshoepolish,ortoepuff(boxtoe)solventsappliedtothebackofthe
material.
Fastnesscanbejudgedbytheeffectonthesamplematerialorthetransferofcolourtothe
rubbingpad.Thechangeinappearanceofthefinishandthecolourtransferredtotherubbing
padisassessedbyreferencetoastandardscale.
Themachinescanalsobeusedfortestingtherub/abrasionresistanceofinksonprintedfilms
underdryoroilyconditions.
Themachinehasarotatingheadholdingacircularfeltpadunderaloadofeither0.73kgor2.5kg
asrequired.Therotatingheadandfeltpadcanberaisedfromthesamplesurfacebymeans
ofahandleverorautomaticallyinthecaseofSTM462,allowingthetestspecimentobe
examinedduringthecourseofthetest.Thecounteroperatesonlywhenthefeltpadisincontact
withthetestspecimen.Itisapre-determinedcounterwhichcanbesettostopthemachine
whenthepresetcounthasbeenreached.
STM461Circularrubfastnesstester
29
Shockabsorption
Althoughthehumanbodycanbeeffectiveinabsorbingshockwhenjumping,runningorwalking,
injuriescanstilloccurthroughimpactloadingtothefoot.Suchinjuriescouldbemitigatedbythe
provision of shock absorbing g capabilities s within footwear. For everyday footwear, shock
absorbancewithintheheelconstructioncanbeabenefittothewearer.Sportsfootwearand
otherhigh performancefootwear,includingformilitaryuse,poseadditionalchallengesfor
managingimpactloading.
Forall these typesoffootwear,being able toconducta controlled,mechanisedtestwith
repeatableresultstodetermineshockabsorptioncapabilitiesprovidesavaluablecontribution
toproductdesign,verificationorassuranceofconsistentquality.
TheSTM479allowsadynamicshockabsorptiontesttobecarriedoutonfootwear,cushion
insocksorconstructionmaterialsandprovidesquantifiabletestresults.Themachineoperates
by allowing g a known mass s to o fall onto o the e sample e from a a defined d height. . By use of an
accelerometeranddisplacementtransducer,avalueforthepeakdeceleration(gfactor)forthe
fallingmassisdetermined.Inaddition,thetestallowsanassessmenttobemadeoftheenergy
returnonrebound.Thisinformationisdisplayedonacomputer–notsupplied–andgraphical
displayscanbeprinted.ThismachineissuitedforcombinationtestingwithSATRASTM512
repeatedcompressiontester.
STM479Dynamicshockabsorption
Rubfastness
STM462Circularrubfastnesstester
ThismachinehasalltheattributesoftheSTM461butwithtwoadditionalfeatures.
1. Anautomaticfeaturetoraiseandlowerthefeltpadtoandfromthespecimensurfacewhile
thetestisinprogress:thispreventsoverheatingofthespecimenasaresultofabrasion
betweenthefeltpadandthetestspecimenwhichcanadverselyaffectresults.
2. Anairblowerwhichdirectsanadjustablestreamofcoolingairontothesurfaceofthespecimen
topreventoverheatingofthesampleduringthetest.
30
Slipresistance
The SATRAslip resistance testerhas s been n developed following
extensivebiomechanicalstudies.Anormalwalkingstepcommences
withheelstrikeandendsasthetoeisliftedfromtheground.Slipis
mostlikelytooccurshortlyafterheelstrikeandjustbeforetoelift
when half body y weightisbeing g applied.The SATRAequipment
recreatestheseconditionsandmeasurestheslipresistancebetween
the sole of the footwearand the floorsurface.The equipmentʼs
uniquedesign allowsitto measuretheslip resistanceofsolings
againststandard flooring materials,orflooring materialsagainst
standard solings. Each machine is supplied d with a standard,
calibratedfloorsurface.Additionalsurfacesareavailableandalmost
anyfloorsurface,whichcanbeattachedtothemachine,canbe
used.
Determiningfrictionorslipresistanceisacomplexprocessrequiring
careful and accurate monitoring of numerous s parameters s in a
relativelyshorttime.Acomputer,housedin the controlconsole,
managesdataacquisitionandprovidesagraphicrepresentationof
thetestdataandcoefficientoffriction(CoF)foreachsampletested.
Thisisachievedthroughconstant,closecontrolofforcesandmotion
speedviaavariable-speedmotoranduniquecircuitrydesign.Test
resultsaredisplayedasafourline,captionedgraph,representing
vertical load, speed of table movement, horizontal load, and
coefficientoffriction.
Teststandardsplacegreatimportanceonthetimingandmethodof
obtainingresults.TheuniqueSATRAsoftwarecontrolsthemachine
andmanipulatesdatagatheredduringthetest.Itensuresaccurate
controloftheentireprocedure,strictlyinaccordancewiththetest
standardparameters.Principaltests,SATRATM144,ENISO13287
andASTMF2913-11,arepre-setinthesoftwareincludedwiththe
machine. Users mayalso o add their own test t standards. These
settingscanbesavedandrecalledforrepeattesting.Teststandards,
includinguser-definedsettings,canbeselectedfromadrop-downlist
tosimplifyoperation.Basedontheuserʼsselections,themachineis
pre-settotherequiredspeeds,delays,andpoint(snapshot)atwhich
theCoFiscalculated.Tosafeguardqualitycontrol,essentialdata
mustbeenteredbeforenewtestscanproceed.Theoperatorʼsname,
teststandard,testsurfaceandallotherrelativedataarerecorded.
Aunique function of the SATRAsoftware is s itsself-teach h mode
appliedduringtesting.Verticalloadismonitoredduringeachtestand
adjustedforthefollowingtestifrequired,ensuringtheverticalload
isalwayscorrect.
STM603Slipresistancetester
31
Stiffness
Tensiletesting
Inbio-mechanicaltrialsorganisedbySATRA,runninginastiffshoewasfoundtoinvolvemore
muscleactivityinthelowerlegand5percentgreaterenergyusagethaninaflexibleshoe.
Longitudinalflexibility,therefore,isadesirablepropertyforsportsshoesandespeciallyrunning
shoes.Flexibilityisalsodesirableinchildrenʼsfootwear,whereunduestrainshouldnotbe
placeduponthestill-growinganddevelopingfoot.
Inoperation,thefootwearisflexedaboutadefinedlinedrawnacrosstheforepart,thebending
momentrequiredtoflexthefootwearandthemaximumangleachievedarerecordedandused
tocalculatetheSATRAstiffnessindex.
Torsionalstiffnessisameasureoftheresistancetotwistingoffootwearaboutitslongitudinal
axis.Thefootwearisclampedinthetoearea,forcesareappliedthroughtheheelclampsuch
thattheheelandbackpartistwistedfirstinwardsandthenoutwardsuptoamaximumangle.
Thetorquerequiredtoachievethetwistisusedtocalculatethetorsionalstiffnessvalues.
STM507Dynamicfootwearstiffnesstester
Thisgeneralpurposemachinehasbeendesignedtomeasurethestrengthandstretchofa
varietyof shoe materialswith h an accuracysufficient t for manyrequirementsof the shoe
manufacturers.Itiseasytouseandtheloadandextensionvaluescanbeeasilyread.The
instrumentissuitablefortestingmostshoematerialsiftheloaddoesnotneedtoexceed150lb
or68kgandtheextension100%.
ThemachinecanalsobeusedfortheBaumannteartestandjawsSTD172ST,tosuitthistest,
areillustratedinthephotographright.Thesejawsneedtobeorderedseparately.
Inuse,astripofthematerialbeingtestedisclampedbetweentwojaws,initiallyfourinches
(10cm)apart,whichareseparatedbyahanddrivetoapplyincreasingtension.Onejawisfixed
toacantileverbeam.Thedeflectionoftheendofthebeamisproportionaltotheappliedload
andismeasuredbyadialgaugecalibratedtogivetheloaddirectly.Thedialgaugeisfittedwith
amaximum-readingdevicetomakeiteasytomeasurebreakingloads.Thesecondjawmoves
overascalewhichgivestheextensionasapercentage.
STD172Simpletensiletester
Stateofcure
Thisdeviceisusedformeasuringvariationsinthedegreeofcureinmoulded-onrubbersoles
throughouttheirthickness.
Thetestprocedureisbasedonthefactthathardnessvariesinmostrubbers,accordingtothe
stateofvulcanisation.
Theresistancetoindentation,whichisdeterminedbythehardnessoftherubber,ismeasured
atseveralpositionsthroughthethicknessofasampletakenfromadefinedpositionedinthe
soleorheel.Thesamplerestsonavibratingplateandanindentorisloweredontoit.After10
seconds,thedialgaugeissettozeroandtheindentorisloaded.Afterafurther15secondsthe
depthonindentationisreadfromthedialgauge.
Thereadingsofindentationdepthareplottedagainsttheirposition,relativetotheinnerand
outersurfacesofthesole,andacurveindicatingthecureofthesoleisdrawn.Fromthisgraph
theamountofʻundercureʼneartheinnersurfaceofthesolecanbecalculated.
Theequipmentconsistsofadialgauge fittedwitha60°conicalendtotheplungeranda
removable500gweight,allmountedonanelectrically-vibratedbaseplate.
STM135Stateofcuretester
32
Tensiletesting
SATRAʼstensiletestersarerobusttwincolumnmachineswithreliablemechanicalattributesand
incorporatedigitalsoftwarecontrol.Themachinesdeliverprecisionperformancethroughhigh
efficiencypre-loadedballscrews,highresolutionloadcellsanddigitalACservodrive.The
machinesoperateinbothtensionandcompressionmodesandprovideupto8timesoverload
capacitywithoutdamagetotheloadcell.
Thesoftwareprovidedrunsfromacomputer(notsupplied)andisuserfriendlywithlargedisplay
pagesforinputtingdata.
This software allows the e operator r to load test methods s required d or r to create specific
requirementsforindividualtests.Displaysandreportscanbecustomisedwithforexample,
specificheadingsorcompanylogos.
TheSTM566machine typicallyhasaload capacityof5kNorlesswhereastheSTM766
typically has s a a load capacity of f 20kN. This higher capacity is particularly relevant for
compressiontestingof,forexample,safetytoecaps.
Bothmachinesoccupythesamefootprintandarangeoftest-specificjawsisavailableupon
requestfromSATRA.
STM566/STM766Tensiletesters
STM566Tensiletestingmachineaccessories
STM566SB
STM566H
STM566F
STM566TB
This specially shaped 'C'
clampisnormallyusedinthe
peel strength testing of
footwearsoletoupper.Itcan
also be used as s a a general
purposeclamp.
Topclamp provided(usedin
conjunction with 566F or
566QRbottomclamp).
This attachment is used d to
determine the
heel pin
holdingstrengthoffootwear
insole board, particularly in
theseatregion.
Suppliedasacompleteunit.
Thisisaversatile,standard,
flatjaw,usedforavarietyof
generalpurposeclamping.
Sold individually(normallya
pairwouldberequired).
TheseSATRAthreadbollards
are used to determine the
breakingloadofthreadsand
laces.
Suppliedasapairofjaws.
Documents you may be interested
Documents you may be interested