®

The EJOT ®

FastenerPredictable

performance improvement

for thermoplastics

EJOT® The Quality Connection

�

20°

30°

140°

2

ImprintEditor:

EJOT GmbH & Co. KG

Industrial Fasteners Division

D57334 Bad Laasphe

Germany

Print:

Druckerei Hachenburg GmbH

D576�7 Hachenburg

© by EJOT GmbH & Co. KG

EJOT®, EJOMAT® und DELTA PT® are registered trademarks

of EJOT GmbH & Co. KG.

TORX®, TORX PLUS® und AUTOSERT® are registered trade-

marks of Camcar, Div. of Textron, Rockford IL.

All technical data may be subject to technical improvements.

Benefits of the EJOT DELTA PT ®

Minimalradialtensionduetooptimizedflankangle

Highclamploads

Hightensileandtorsionstrength

Increasedcyclestressstability

Highstrengthundervibration

DELTAPT®prognosisprogrammeallowsaclampload orientedengineering

Longlifetimeofthejoint

Minimizationofhydrogenembrittlementbyuseof throughhardenedsteel[PT10]

The product

Flank design

3

DELTA PT®

F1 rad

R1 F1 ax

New possible fields of application for high-quality plasticsNowadayssometimesalternativematerialsareconsideredforcomponentsthatusedtobemadeofdiecastlightalloys.Moderntechnicalplasticsopenupnewpossibilitiesbecauseoftheirimproveddesignpotentialorforreasonsofweightreductionorrecycling.Stillthequestionofhowtosecurelyfastenthesecomponentsremainsunansweredorisconsideredverylate,eventhoughsupportisavailableduringthedesignprocessalready.

Whenmachinescrewsarebeingusedavarietyofexistingtablesandformulasforjointdesignareknown.Forself-tappingassemblyinthehigh-classtechnicalplastics,oftennosufficientinformationisavailable.Inmostcasestheparametersforassemblystillhavetobedetermined,whe-reasstandardscrewsareoftennotqualifiedforassemblyinplastics.

Thematerialstrengthofmoderntechnicalplasticsisnearlycomparabletothatofcastlightmetal.Furthermorethepossibletemperaturerangeisveryhighsothathighclassplasticscanbeusedintheautomotiveindustry,wheresofaronlycastlightmetalwassuitable.Thisopensupnewfieldsofapplication,thustheaccordingfasteningsolutionhastobeavailable.

Analysis of material displacementFortheabovementionedreasonsEJOTcarriedoutfun-damentalteststhatledtothedevelopmentoftheEJOTDELTAPT®screw.Theflankgeometrywasoptimizedaftertheconsequentanalysisofthematerialdisplacementduringthethreadgroovingprocess.Thedeformationofthematerialtakesplacewithminimalresistance,whichguaranteesdamage-freeflowofthematerial.

Minimal radial tensionTheoptimizedthreadflankangleoftheEJOTDELTAPT®screwreducestheradialstresscomparedtocommon60°flankanglesofsheetmetalscrews.The20°respectively30°anglecreatesonlyminorradialtensionandthereforeallowsthin-walldesign.Thebiggerforceinaxialdirectionallowsanoptimumflowofthedisplacedmaterial.

Macro detail

Forces at the thread flank

Predictable performance improvement

4

FV

pFL

pFL

X [mm]

1

10

1.000 10.000 100.000 1.000.000 10.000.000

F [k

N] DELTA PT 50

PT K 50

2

3

High clamp loadsAccordingtogeneralvalidconstructionguidelinestheexistingcontactpressurehastobesmallerthanthepermissiblecontactpressure.Iftheexistingcontactpressureistoohigh,itmayleadtodamagesofthermopla-sticcomponents.Amajorinfluenceisexecutedbythreadcoverageand

thusthethreadpitch.Theoptimumhelixangleofthepitchwasdevelopedbyoptimizingtherelationbetweenthehighestpossibleclamploadandlowcontactpressureintheplasticmaterial.Thusahigherflankcoverageatequalinstallationdepthcanbeachieved.Thisleadstothepossi-biltyofcostreduction.

High tensile and torsion strengthTheenlargedcorediameterincreasesthetensileandtor-sionstrength.Asaresultofthis,eveninhigh-filledthermo-plasticshighertighteningtorquesandbetterclamploadsarebeingachieved.

Increased fatigue durabilityThefatiguedurabilityisessentiallyimprovedbyanexten-dedcorediameterandanoptimumthreaddesign.Thereinforcedthreadrootimprovesthesafetyagainst

flankbreakage.Theoptimizedpitchallowsabetterflankengagementand,therefore,providesbetterconditionsagainststressfractureofthethreadflank.

Thecomparisonbetweenthe„Wöhler“graphofthePT®andtheDELTAPT®screwinthedimension50(=5.0mmdiameter)showsanincreaseofthefatiguestrengthbyfactor1.5.

„Wöhler“ graph of PT® and DELTA PT® screw, tensile stress oscillatory;Increased fatigue strength of DELTA PT® by 50% compared to PT®

PT® DELTA PT®

Fatigue strength comparison;Breakage of the thinner fastener cross section (PT®) at lower cycle rate

X [mm] = thread engagement

Contact pressure in the thread

Cycles

Predictable performance improvement

5

6

FA

fS fP

FSA

FPA

FKR

FS

f = fSA PA

Volker Dieckmann

Dr.-Ing. Gottfried König

Dipl.-Ing. Stephan Weitzel

FORUM

6

Fv

Forces within a screw jointActingforcesanddeformationsinthejointduringoperatingconditionsaredescribedinthestressdiagramm.Byapplyinganappropriatetighteningtorqueduringassem-bly,arelatingclamploadisbeingcreatedinthescrewjoint.Itsreactingforceclampsthecomponentstogether.Thisprocesscreatesasurfacepressure,whichhasto

besustainedbythematerialsinvolvedoverlifetimeevenunderthermalstress.Thematerialofthematingcomponentaswellasthe

bossmaterialhavetoresisttheresultingcontactpressure.

TheoptimizedthreadgeometryoftheDELTAPT®screwensuresadequatestressdistributionwithintheplasticfemalethread.Byusinglargeheaddiameters,surfacepressureundertheheadcanbeminimized.

PleasederivemoreinformationfromfurtherliteratureortheEJOTForum6.

Stress diagramm

Fv clamploadFSA additionalaxialscrewdeformationforceFPA forcetounloadcomponentFA operatingloadFKR remainingclamploadFS forceofthefastenerfS elasticelongationoffastenerfP shorteningoftheclampedpartfSA screwelongationunderdynamicpressurefPA shorteningoftheclampedpart

Spring line screw Spring line clamped part

Force F

Length

TechnicalReport

Directscrewfastening

ondynamicandthermic

stressedcomponents

bymeansofanewly

developedthreaddesign

EJOT® The Quality Connection

Predictable performance improvement

7

Clamp load oriented designInadditiontotheimprovedengineeringfeaturesofthescrew,theprognosisprogramDELTACALC®wasdevelopedforDELTAPT®.Theprognosisprogramsup-portsthedimensioningofthefastenerandalsoassistsindeterminingtheloadcarryingability.InaccordancewithVDI2230,aclamploadorienteddesignispossible,whereaslifetimeanddurabilityofthescrewjointundertemperaturestresscannowbeforecasted.Thisallowsqualitativeallegationsaboutthefunctionof

thescrewjointunderstaticstress.

For further information about the EJOT prognosis program, please contact our sales force or our hot-line.

EJOT HotlinePhone: +49 2752 109-123Fax: +49 2752 109-268E-Mail: hotline@ejot.de

Prognosis program

The EJOT prognosis program enables dimensio-

ning of screw joints for the future. That adds safety

during the design stage.

A practical test with off-tool components can be

done in the EJOT APPLITEC.

�

1,8

1,6

1,4

1,2

1,0

0,8

0,6

0,4

0,2

0,0

90

80

70

60

50

40

30

20

10

00 1000 2000 3000 4000 5000 6000 7000

High strength under vibrationThespecialcombinationofthreadpitchandflankgeometryoftheEJOTDELTAPT®allowshighvibrationsafety.Thissafetyresultsfromtheretardingeffortbetweenplasticandthreadflankontheonehandandthethreadpitchwhichissmallerthanthefrictionangleontheotherhand.Thusbetterconditionsagainstselflooseningofthefastenerarebeingachieved.

Long lifetimeIfaforceisappliedtopolymermaterials,areductionoftensionbycreepingandrelaxationcanbeobservedoveracertainperiodoftime.WiththedevelopmentoftheEJOTDELTAPT®screwalotofattentionwasgiventothisphe-nomenon.Duetotheoptimizedthreadgeometryandhighthreadflankengagementalowsurfacepressureandthusamaximizedclamploadoverlifetimecanbeobserved.

Clamped part

Discs

boss

Test setup for detection of clamp force FCl

Calculated for improved performance

Example diagram: course of clamp load over time

TemperatureClamp load FCl

time [min]

forc

e [k

N]

tem

per

atur

e [C

°]

Load cell

�

10

F(kN)

M(Nm)

Key: Ath = threadcoverage di = installationdepthP = pitch Tt = tighteningtorquedh = holediameter Fc = clampload

Reduction of fastener length and/or diameter:Anexampleissupposedtodemonstrate,howthescrewlengthorthescrewdiametercanbereducedbyusingDELTAPT®screws.APT®screwwitha30°profileangleandcorerecessiscomparedtoaDELTAPT®screw.Assumingthesamethreadengagement,whichdependsonpitch,insertiondepthandflankgeometry,possibilitiesasshowninthechartwillresult.(Pictures,,)Thethreadenagagementresultingfromconventional30°screwscanbeachievedbyusingDELTAPT®withalowerinsertiondepthorasmallernominaldiameter.Asanalterna-tive,aDELTAPT®screwwiththesamedimensionscanbeusedinordertoreachahigherclampload.

Application exampleUsingtheexampleofanewgenerationofvalves,theprac-ticabilityoftheratiopotentialcanbedemonstrated.Thepreviousconstructionsolutionwasanalyzedforsavingspotential.Intheexistingsolutionsofara6mmscrewhadbeenused.ThejointwasrecalculatedwiththeEJOTpro-gnosisprogrammeDELTACALC®(seealsop.7)andtheresultsindicatedanover-dimensionedthreaddiameter.

Thusforthefirstprototypesthenewdesignofthevalveswasthendimensionedfora5mmDELTAPT®screw.Thetestsproducedthefollowingresults:

Ti:2,45NmTs:8,44NmTt:4,5Nm

Thevalveswerethenputintothelifecycletestwiththeseassemblyparameters.Here,noleakproblemsemerged.Theassemblywiththenewconstructiondesignisrunningsincequitesometimewithoutanyfailuresnow.ForthevalveproducerthereductionofthescrewdiameterduetotheuseoftheDELTAPT®screwresultedintheminmi-zationofthecomponent‘swallthicknesses.Thecomponentcouldthusbeproducedwithlessmaterialemployment,whichalsoledtoreducedcycletimesinproduction.Thesmallerthreaddiameterledtoconsiderablecostsavingsandageneralweightreductionofthecomponent.

Ratio potential

DestructionofjointFailure

ScrewbreakageBosscompression

Ti+Ttf+Thf

Material: Ath P dh di Tt Fc

PA6 GF30 mm2 mm mm mm Nm kN

PT®K 50 35 2,24 4,0 13,24 2,9 1,4

DELTA PT® 50 35 1,80 4,0 9,88 2,9 1,8

DELTA PT® 40 35 1,46 3,2 11,75 2,9 2,4

DELTA CALC® Diagram

If an existing PT® screw is being replaced by a DELTA PT® screw,

screw diameter and/or screw length can be reduced with a con-

sistent thread coverage

Initial situationEJOT PT® K 50x16

Alternative AEJOT DELTA PT® 50x12

Alternative BEJOT DELTA PT® 40x16

11

dT=2xd1

dh

dE

t e=2xd1

db=0,8xd1

Design recommendationsThe precondition for a safe screw joint is the functio-nal design of the components.Inprinciple,thebossdesignshouldcorrespondtotheillustrateddesignrecommendation.

Thecounterboreisofspecialimportance,asitensuresafavourableedgestressreduction,thuspreventingbosscracking.Inaddition,thecounterboreactsasalead-inandguidanceduringinitialthreadforming.

Boss designThemostfavourableholediameterhasinmostcasesproventobe:

dh = 0,8 x d1

Forhigherfilledmaterialsormaterialswithabiggerstrengththeholediametercanbeincreaseduptodh=0,88xd1.

Revolution speedWiththeuseofaDELTAPT®screwthedefaultrecommen-dationof500r/mincaneasilybeincreasedto1000r/mininmanyplastics-withoutsignificantslumpsinachievableclamploadorstrippingtorque.

Designrecommendationshavebeenworkedoutonthebasisofextensivelaboratorytests.Inpracticaloperations,deviationsoftheserecommendationsmayoccurdueto:

l processingconditionsofthematerial

l designoftheinjectiontool

l distancefromtheinjectionpoint

l theformationofweldinglines

l localtexturescausedbyadditivesandfillings

l materialsoftenvariateinthepercentageofthe

composition

Thus,fasteningtestsshouldbecarriedoutwithinitialsam-ples.Forthispurpose,EJOToperatesitsownapplicationlaboratory,theEJOTAPPLITEC.

d1 = Nominal-Ø of the screwdE = d1 + 0,2 mm

T[Nm] FClatTs[kN]

Mean Ti

Mean Ts

Mean FCl

Material: fibre-glass-reinforced polyamide

The graph shows that an increased revolution speed is possible with constant FCl and Ts when a DELTA PT® screw is used

n[r/min]

0,3to0,4xd1

1�

0 2 4 6 8 10

30,0

25,0

20,0

15,0

10,0

5,0

8

7

6

5

4

3

2

1

00 0,2 0,4 0,6 0,8 1,0 1,2

6

5

4

3

2

1

0

Tigthening torques and repeat accuracyInordertoensuresafescrewjointsandsmoothassem-blies,manyinfluencingfactorshavetobeconsidered.Asufficientlyhighdistancebetweeninstallationandstrip-pingtorqueisasimportantastheuseofanappropriatedrivetoolfeaturingtorqueand/ortorqueangleshutoff.Thetighteningtorqueiscalculatedasafunctionofthe

requiredclampforce.Thedrivertoolistobeadjustedaccordingly.Componenttestsshouldbecarriedouttoestablishtherepeataccuracyaswellastherealclamploadinordertoconsiderallinfluenceswhichhavenotyetbeendetermined.Undercommondesigncircumstancesaseveraltime

repeatassemblyispossible.InaccordancewithVDE0700thegeneralrequirementscanbeachieved.

Assembly technique

Material:ABS

Screw:EJOTDELTAPT®80

Hole-Ø:5,80–6,30mm,conical

Penetrationdepth:17mm

Ti:InstallationTorque TS:StrippingTorque

Tt:TighteningTorque Tl:LooseningTorque

Torque[Nm]

10 times repeat assembly

Numberofrepeatassemblies

Assemblystart

Headcontact

Destructionofjoint

Example graph: Installation of DELTA PT®

Cla

mp

load

[kN

]

Torq

ue [N

m]

Course of torque (Tt )

Clamp load

Torque test

Course of torque (Ts )

Ti TL Tt Ts(10)

Creationofclampload

Time [sec]

13

14

10 12 14 16 18 20 22 25 d1 1,00 1,20 1,40 1,60 1,80 2,00 2,20 2,50 d2 0,64 0,78 0,93 1,07 1,22 1,36 1,51 1,72 P 0,44 0,51 0,57 0,64 0,71 0,78 0,85 0,95 Xmax. 0,50 0,60 0,70 0,80 0,90 1,00 1,10 1,30

D 3,20 3,60 4,00 4,50 5,00 5,50 K 1,15 1,20 1,35 1,40 1,60 1,80 s 0,50 0,60 0,60 0,60 0,60 0,70 Rmax 0,35 0,35 0,40 min. 0,51 0,68 0,82

tmax. 0,97 1,14 1,28

min. 0,73 0,86 1,01

tmax. 0,98 1,11 1,26

min. 0,56 0,81 1,01

tmax. 0,84 1,10 1,31

0 0 0 1 1 1

D 3,50 3,90 4,40 K 1,60 1,60 1,90 Rmax 0,35 0,35 0,40 min. 0,64 0,74 0,92

tmax. 1,10 1,20 1,38

min. 0,82 0,92 1,08

tmax. 1,07 1,17 1,33

min.

tmax.

1 1 1

D 3,20 3,60 4,00 4,50 5,00 5,50 K 1,15 1,20 1,35 1,60 1,60 1,90 s 0,50 0,60 0,60 0,60 0,60 0,70 Rmax 0,20 0,25 0,25 0,35 0,35 0,40 /AUTOSERT® 3IP 5IP 6IP 6IP 6IP 8IP ARef. 1,20 1,45 1,75 1,75 1,75 2,40 min. 0,40 0,50 0,50 0,65 0,65 0,80

tmax. 0,55 0,65 0,65 0,85 0,85 1,00

D 3,50 3,90 4,40 K 1,60 1,60 1,90 Rmax 0,35 0,35 0,40 /AUTOSERT® 6IP 6IP 8IP ARef. 1,75 1,75 2,40 min. 0,65 0,65 0,80

tmax. 0,85 0,85 1,00

D 4,00 4,40 5,00 cmax 0,35 0,35 0,55 ~~f 0,40 0,40 0,50 Rmax 0,80 0,80 1,00 /AUTOSERT® 6IP 6IP 8IP ARef. 1,75 1,75 2,40 min. 0,65 0,65 0,80

tmax. 0,85 0,85 1,00

D 4,00 4,40 5,00 cmax 0,35 0,35 0,55 Rmax 0,80 0,80 1,00 /AUTOSERT® 6IP 6IP 8IP ARef. 1,75 1,75 2,40 min. 0,50 0,50 0,70

tmax. 0,65 0,65 0,90

*

EJOT DELTA PT® Dimensions Externalthread-Ø Core-Ø Threadpitch Threadrun-out

WN 5411 Head-Ø Headheight Washerthickness Radius H-cross- Penetration recess depth Z-cross- Penetration recess depth C-cross- Penetration recess depth CrosssizeH/Z/C

WN 5412 Head-Ø Headheight Radius H-cross- Penetration recess depth Z-cross- Penetration recess depth C-cross- Penetration recess depth CrosssizeH/Z/C

WN 5451 Head-Ø Headheight Washerthickness Radius /AUTOSERT®

Penetrationdepth

WN 5452 Head-Ø Headheight Radius /AUTOSERT®

Penetrationdepth

WN 5453 Head-Ø Cyl.headheight Calotteheight ~ Radius /AUTOSERT® 6IP 6IP 8IP

Penetrationdepth

WN 5454 Head-Ø Cyl.headheight Radius /AUTOSERT®

Penetrationdepth

DELTA PT® 14-18: h14from DELTA PT® 20: h15

Design

15

30 35 40 45 50 60 70 80 100 d1 3,00 3,50 4,00 4,50 5,00 6,00 7,00 8,0010,00 d2 2,09 2,45 2,81 3,17 3,53 4,26 4,98 5,70 7,15 P 1,12 1,29 1,46 1,63 1,80 2,14 2,48 2,82 3,50 Xmax. 1,50 1,80 2,00 2,30 2,50 3,00 3,50 4,00 5,00

D 6,50 7,50 9,0010,00 11,0013,5015,50 K 2,10 2,40 2,50 2,50 3,20 4,00 4,60 s 0,80 0,90 1,00 1,00 1,20 1,40 1,60 Rmax 0,50 0,50 0,60 0,60 0,70 0,80 0,90 min. 1,15 1,07 1,33 1,33 1,98 2,24 2,84

tmax. 1,61 1,70 1,96 1,96 2,61 2,90 3,50

min. 1,26 1,08 1,40 1,40 2,01 2,27 2,91

tmax. 1,51 1,54 1,86 1,86 2,47 2,73 3,37

min.

tmax.

1 2 2 2 2 3 3

D 5,30 6,10 7,00 7,50 8,8010,5012,30 K 2,30 2,70 3,10 3,20 3,50 4,20 5,10 Rmax 0,50 0,50 0,60 0,60 0,70 0,80 0,90 min. 1,19 1,23 1,51 1,51 2,12 2,44 3,00

tmax. 1,65 1,86 2,14 2,14 2,75 3,10 3,66

min. 1,36 1,26 1,62 1,62 2,23 2,57 3,14

tmax. 1,61 1,72 2,08 2,08 2,67 3,03 3,61

min.

tmax.

1 2 2 2 2 3 3

D 6,50 7,50 9,0010,00 11,0013,5015,5018,00 K 2,30 2,70 3,10 3,20 3,50 4,20 4,90 5,60 s 0,80 0,90 1,00 1,10 1,20 1,40 1,60 1,80 Rmax 0,50 0,50 0,60 0,60 0,70 0,80 0,90 1,00 /AUTOSERT® 10IP 15IP 20IP 20IP 25IP 30IP 30IP 40IP ARef. 2,80 3,35 3,95 3,95 4,50 5,60 5,60 6,75 min. 1,00 1,10 1,40 1,40 1,50 1,90 2,30 2,60

tmax. 1,30 1,50 1,80 1,80 1,90 2,40 2,90 3,20

D 5,30 6,10 7,00 7,50 8,8010,5012,30 14,10 17,00 K 2,30 2,70 3,10 3,20 3,50 4,20 4,90 5,60 6,60 Rmax 0,50 0,50 0,60 0,60 0,70 0,80 0,90 1,00 1,10 /AUTOSERT® 10IP 15IP 20IP 20IP 25IP 30IP 30IP 40IP 50IP ARef. 2,80 3,35 3,95 3,95 4,50 5,60 5,60 6,75 8,95 min. 1,00 1,10 1,40 1,40 1,50 1,90 2,30 2,60 3,00

tmax. 1,30 1,50 1,80 1,80 1,90 2,40 2,90 3,20 3,50

D 6,00 7,00 8,00 9,0010,0012,0014,0016,00 20,00 cmax 0,55 0,65 0,70 0,70 0,75 0,85 0,90 0,95 1,10 ~~f 0,70 0,80 1,00 1,00 1,20 1,20 1,30 1,40 1,60 Rmax 1,20 1,40 1,60 1,80 2,00 2,40 2,60 3,20 4,50 /AUTOSERT® 10IP 15IP 20IP 20IP 25IP 30IP 30IP 40IP 50IP ARef. 2,80 3,35 3,95 3,95 4,50 5,60 5,60 6,75 8,95 min. 1,00 1,10 1,40 1,40 1,50 1,90 2,30 2,60 3,00

tmax. 1,30 1,50 1,80 1,80 1,90 2,40 2,90 3,20 3,50

D 6,00 7,00 8,00 9,0010,0012,0014,0016,00 20,00 cmax 0,55 0,65 0,70 0,70 0,75 0,85 0,90 0,95 1,10 Rmax 1,20 1,40 1,60 1,80 2,00 2,40 2,60 3,20 4,50 /AUTOSERT® 10IP 15IP 20IP 20IP 25IP 30IP 30IP 40IP 50IP ARef. 2,80 3,35 3,95 3,95 4,50 5,60 5,60 6,75 8,95 min. 0,75 0,95 1,10 1,25 1,25 1,50 2,30 2,40 3,00

tmax. 1,00 1,30 1,45 1,70 1,65 2,00 2,90 2,90 3,50

EJOT DELTA PT® Dimensions Externalthread-Ø Core-Ø Threadpitch Threadrun-out

WN 5411 Head-Ø Headheight Washerthickness Radius H-cross- Penetration recess depth Z-cross- Penetration recess depth C-cross- Penetration recess depth CrosssizeH/Z/C

WN 5412 Head-Ø Headheight Radius H-cross- Penetration recess depth Z-cross- Penetration recess depth C-Kreuz- Penetration schlitz depth CrosssizeH/Z/C

WN 5451 Head-Ø Head-height Washerthickness Radius

Penetrationdepth

WN 5452 Head-Ø Headheight Radius

Penetrationdepth

WN 5453 Head-Ø Cyl.headheight Calotteheight Radius

Penetrationdepth

WN 5454 Head-Ø Cyl.headheight Radius

Penetrationdepth

Design

16

js14 0,12 0,15 0,18

js16 0,30 0,375 0,45 0,55 0,65 0,80 0,95 1,10

+_

+_

+_ +_

+_+_ +_+_ +_+_+_

g

g

g

g

g

g

g

g

g

z z z z zz

Nominal value[mm]

Tolerance over 3 over 6 over 10 over 18 over 30 over 50 over 80 to 3 to 6 to 10 to 18 to 30 to 50 to 80 to 120

h14 0 0 0 0 0

-0,25 -0,30 -0,36 -0,43 -0,52

h15 0 0 0 0 0

-0,40 -0,48 -0,58 -0,70 -0,84

EJOT DELTA PT® 14 16 18 20 22 25 30 35 40 45 50 60 70 80 100screwExternal-Ød1 1,4 1,6 1,8 2,0 2,2 2,5 3,0 3,5 4,0 4,5 5,0 6,0 7,0 8,0 10,0

Tolerance +0,08+0,08+0,08+0,08+0,08 +0,10 +0,10 +0,10 +0,10 +0,10 +0,15 +0,15 +0,18 +0,18+0,25

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Special variations /Examples

Specialvariationsareavailable.PleasecontacttheEJOTapplicationengineerstorealizeyourmultifunctionaldesigns.

Headstyle Labelling Drive Dia-meter

Labelling Length Thread-end

Labelling Surface

11 ZHC

1,001,20

1012

min.2xd Standard -- Zn-blue

12 ZHC

Shortdogpoint

Z DeltaTone

51 -- 4,00 40 14 Pilotpoint

R Zn-Ni

52 -- Cutting-edge

S DeltaProtekt

8,0010,00

80100

max.10xd

DELTAPTWN54 x11 H 40 14 R Zn-blue

Tolerances

Example of ordering

17

14 16 18 20 22 25 30 35 40 45 50 60 70 80 100

Øesternod1 1,4 1,6 1,8 2,0 2,2 2,5 3,0 3,5 4,0 4,5 5,0 6,0 7,0 8,0 10,0LunghezzaL[mm]

3,0±0,3003,5 ±0,3754,0 ±0,3754,5 ±0,3755,0 ±0,3756,0 ±0,3757,0 ±0,45 R S8,0 ±0,45 R R R S S9,0 ±0,45 R R R R,S S S10,0 ±0,45 R R R R,S S S11,0 ±0,55 R R R R,S R,S S S12,0 ±0,55 R R R R,S R,S R,S S S14,0 ±0,55 R R R R,S R,S R,S R,S S S15,0 ±0,55 R R R R,S R,S R,S R,S S S S16,0 ±0,55 R R R R,S R,S R,S R,S R,S S S18,0 ±0,55 R R R R,S R,S R,S R,S R,S R,S S20,0 ±0,65 R R R,S R,S R,S R,S R,S R,S S21,0 ±0,65 R R,S R,S R,S R,S R,S R,S R,S22,0 ±0,65 R R,S R,S R,S R,S R,S R,S R,S24,0 ±0,65 R,S R,S R,S R,S R,S R,S R,S25,0 ±0,65 R,S R,S R,S R,S R,S R,S R,S27,0 ±0,65 R,S R,S R,S R,S R,S R,S30,0 ±0,65 R,S R,S R,S R,S R,S R,S35,0 ±0,80 R,S R,S R,S R,S R,S36,0 ±0,80 R,S R,S R,S R,S40,0 ±0,80 R,S R,S R,S R,S42,0 ±0,80 R,S R,S R,S45,0 ±0,80 R,S R,S R,S48,0 ±0,80 R,S R,S50,0 ±0,80 R,S R,S60,0 ±0,95 R,S70,0 ±0,9580,0 ±0,95

SR

Chrom VI free surfaces: l zincclear/bluepassivatedl zincclear/bluepassivatedwithEJOSEAL (240hresistancetoZn-corrosion)l zincclear/thickfilmpassivationl ZnFeorZnNi/transparentpassivated (withorwithoutblacktopcoats)l ZnNi,blackpassivatedl zincflakecoatings(e.g.DeltaProtekt)

Fastener materials:l Throughhardenedsteel accordingtoDINENISO10263T4 withmaterialproperty[PT10](WN5461,part2)l Stainlesssteel[A2],[A4]l Aluminium[Alu]

More information under:EJOT Hotline Phone +49 2752 109-123 Fax +49 2752 109-268 e-mail: hotline@ejot.de

Possible manufacturing range of EJOT DELTA PT® screws

EJOT DELTA PT®

screw

Length

Upperline=minimallength(countersunkheadlengthLmin=L+2mm)

Lowerline=maximallength

ManufacturingwithcuttingedgepossibleManufacturingwithpilotpointpossible

Length>60mmwithpartialthreadonly(partialthreadlength4xd1)

Special geometries upon request!

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Manufacturing range

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® Design ConsultationAmajorconsiderationoftoday‘sproductmanufactureisthebasicneedtobecostcompetitive.Significantinachievingthisobjectiveisthedesignprocess.Nootherpartofthecoststructureisinfluencedmorethanbydesign.

Generallyspeaking,thedevelopmentofaproduct,whichrepresentsabout10%oftheoverallcosts,determinesabout70%ofthecostsforthefinalproduct.

Oftenthedesignofthefixingisconsideredtobeoflowimportance;however,itisthefastenerthatholdsthecom-ponentstogethertomakethefinishedproduct.Withthisinmindthedesignengineershouldconsiderwhichfasteningmethodtouseduringthedesignconceptionstagetoavoidexpensivedessignchangesslateoninthedesignprocessorevenwhentheproductgoesintoproduction.

ToassistourcustomersinthisprocessEJOTofferssup-portduringthedesignstagebycomprehensiveapplicationengineeringservices.Theseservicesprovideaccurateinformationonproductperformanceandresultindesignrecommendationsthatcanbeusedsafelyontheproductline.

Consequent Application EngineeringThecontinousworkwithourcustomersandtheirapplicationproblemsgreatlyenhancesourunderstandingoffastenertechniqueandopensuppossibilitiesforinnovation.There-fore,weconsequentlyimproveourproductstomeetcusto-merdemandsandneeds.

Ontopofourhighlyqualifiedengineersandapplicationengineeringadvisors,weoffertheserviceofourapplica-tionlaboratorycalledEJOTAPPLITEC.Herewecarryoutaseriesoftestproceduresonourcustomers‘applicationsthatenableustothoroughlyanalyzethestrengthsandcapabili-tiesoftheirparts.Also,newfasteningtechniquesarebeingdevelopedinintheEJOTAPPLITEC.

Ourknowledgeispassedontoourcustomersandthereforesupportstheireffortstowardsmorerationalfasteningandassemblytechniques.

Detailedtestreports,technicaladviceonsite,acknow-ledgedseminarsandtechnicalpublicationsshowourconti-nuedcommitmenttoimpartourknowledge.

Your system partner

Test rack at EJOT APPLITEC

Test report

Internal Seminar

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®Logistic and Data ExchangeItisouraimtokeepprocurementandwarehousingcostsaslowaspossiblebysimultaneouslyofferingproductavailabi-lityandquality.Withrespecttosimplifiedprocuringprocesses,EJOToffersavarietyofcostreducingproceduresandservices.Thecontinuedanalysisofourcustomers‘demandsandadvancedlogisticsproceduresleadtohighavailabilityofourproducts.Skeletoncontractsanddeliveryschedulesviaelectronicdatainterchangefacilitateandacceleratetheprocessingtimesofourproducts.

Quality for Automated AssemblyThefastenersgradeofpurityhasasignificantimpactontheminimisationoffailureandthusleadstoahighavailibilityoftheassemblymachine.Historically,thestandardqualityincommercialfastenermanufactureisnotsufficientfortoday’shighqualityrequirementssinceoriginallyithasbeendesi-gnedformainlymanualassembly.EJOTintroducedtheEJOMAT®Qualitytoensurethemostcost-effectiveusageofourcustomers‘automatedassemblymachines.

ThegradeofpurityofferedbyEJOMAT®Qualityis10timeshigherthantheusualstandardqualitywhichmeansincrea-sedavailabilityofassemblymachineanddecreasedassem-blydowntimecosts.

EJOMAT®, quality that pays for itself.

Your system partner

Modern PPS-systems lead to high accuracy in supply and short through put times

EJOMAT® for fully automated assembly

EJOT Sales OrganizationInadditiontoEJOTcompaniesthroughoutEuropeagrowingnumberofLicenseesinNorth&SouthAmericaandAsiaensurestheglobalavailibilityofproductsandlocalsupport.Contactdetailscanbefoundonourhomepagewww.ejot.com.

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EJOT GmbH & Co. KG IndustrialFastenersDivisionUntereBienheckeD-57334BadLaaspheP.O.Box1163D-57323BadLaasphephone +492752109-0fax +492752109-141e-mail:industrie@ejot.deInternet:www.ejot.com

EJOT The Quality Connection®