Ø SURUBmm1.62

2.534568

1012141618202224273033363942454852566064

ISO272Pas �letISO mm

0.350.4

0.450.50.70.81

1.251.5

1.7522

2.52.52.533

3.53.544

4.54.555

5.55.56

DCmm3.245

5.578

10131618212427303436414650556065707580859095

5.6Cs

0.060.1260.2610.441.032.033.538.5

16.829467199

140192241355483653841

10881348168120322608325540324856

5.6Fo

260432718

10771868305343107904

1258018337251753459742094540596751177845

102393124491155083182032218667250311292970329254395006456159532893602793

5.8Cs

0.0840.1770.3650.621.442.854.9511.9

234065

100139196269338498677915

117715231887235328453651457756456798

5.8Fo

364604

10061508261542756034

1106617612256723524548436589327568294515

108983143350174287217116254845306135350435410158460956553008638622746050843911

6.8Cs

0.0960.2020.4170.711.653.255.6

13.6274674

115159225307387569773

1046134617412156269032514172520864517769

6.8Fo

416690

11501724298848856896

12647201282933940280553566735186494

108017124552163829199185248132291252349868400497468752526807632009729854852629964470

8.8Cs

0.1280.27

0.5560.952.2

4.347.5

18.2366299

153220311424534784

1067144218552399296536984470573771618871

10683

8.8Fo

555921

15332298398565149195

168632683839119537077380892440

119003148374171437225110274030341347400571481158550683644534724359869013

100354911723651326146

9.8Cs

0.1440.3030.6261.092.494.928.53

20.634170

111173

9.8Fo

62410361724258644847335

103361896830197440226025183165

10.9Cs

0.1890.3960.821.4

3.236.311265291

145225313440602758

111415152048263634104223526763678171

101991263415215

10.9Fo

81513522251337658539568

1350624678394185745778882

108406131897169385211534243914320832390072485926570369685159784306917973

10316631237685142929816697321888753

12.9Cs

0.2210.4830.961.643.787.4

12.63161

106170263366515704887

130417732397308539904941616474509562

119351478517805

12.9Fo

9541582263439516849

111961580528984461286723692309

126858154348198216247540285432375442456467568637667453801782917805

107422312072651448354167258219539412210243

Clasa de calitate suruburi de otel ISO 898-1

Ø SURUBmm1.62

2.534568

1012141618202224273033363942454852566064

ISO272Pas �letISO mm

0.350.4

0.450.50.70.81

1.251.5

1.7522

2.52.52.533

3.53.544

4.54.555

5.55.56

DCmm3.245

5.578

10131618212427303436414650556065707580859095

5.6Cs

0.080.160.330.571.3

2.594.4910.9

21375993

128182250313463628854

109614241760220326593425427053066382

5.6Fo

234388648972

1685275938917145

113791659422789313853812349039613267061693042

116045141009165409198910227588266613299530359684415172485416548969

5.8Cs

0.1050.2220.463

0.81.833.626.2

15.2305283

130179254350438649880

1195153419942464308537224795597874288935

5.8Fo

327544907

1362235936825448

100031593023231319054393953373686558585798863

130259158263197412231573278474318624373258419342503558581240679583768556

6.8Cs

0.120.2540.5290.912.094.147.1

17.4345995

148205291400500741

1005136617542279281635254254548068328490

10212

6.8Fo

374621

10361556269644146226

1143218206265503646350216609987846398123

112986148868180872225614264655318257364141426580479248575495664275776666878350

8.8Cs

0.160.3390.7051.212.785.59.5234679

127198283402552691

1022138718842418313938724847584973359394

1167314041

8.8Fo

499829

13822075359458868302

152422427535401486186695583746

107941134806155489204577248811310343363974437669500694586548658966791306913378

10679161207731

9.8Cs

0.180.3810.7931.383.166.27

10.8426.34

5290

143224

9.8Fo

561932

15552335404466269334

1714627313398355457075422

10.9Cs

0.2350.4981.041.794.098.1143467

116187291402570783981

14521969267634354463551569038330

10731133791662519998

10.9Fo

73212172030304852798645

121942238835655519957140898340

119454153657192257221266291534354209441828518282623253713110835386938258

1127011130087115209711720102

12.9Cs

0.2750.5821.212.094.799.5

16.44079

136219341471667917

114817002305313240205223645380799748

12558156561945523402

12.9Fo

8571424237535676178

101161426926198417246084583563

115079139787179811224865258928341157414500517033606501729339834491977579

10982771318843152229617798602012885

Clasa de calitate suruburi de otel ISO 898-1

Ø SURUBmm1.62

2.534568

1012141618202224273033363942454852566064

ISO272Pas �letISO mm

0.350.4

0.450.50.70.81

1.251.5

1.7522

2.52.52.533

3.53.544

4.54.555

5.55.56

DCmm3.245

5.578

10131618212427303436414650556065707580859095

5.6Cs

0.090.180.380.661.51

35.2

12.6254369

108149213293366544737

1004128816772070259631304041503462667533

5.6Fo

210349582874

1514248134986426

102381493420514282803432444188552986363083910

101914127210149174179487205323240641270321324763374739438337495676

5.8Cs

0.120.2560.5360.922.114.27.2

17.7356097

152209298411513762

1032140618032348289836354383565770488772

10546

5.8Fo

294488815

12242120347348938997

1433420908287193959248054618637741889083

117474142679178094208844251282287452336897378449454668524635613672693947

6.8Cs

0.1370.2930.6121.062.424.818.3204069

111174239341470586871

118016072060268333124154500964658054

1002612052

6.8Fo

335558931

1399242239705598

1028316382238953280045248549197070088478

101809134257163062203536238679287179328516385025432514519620599582701340793082

8.8Cs

0.1830.39

0.8161.413.226.4

11.1275392

148232330471648809

120116282216284036974554571268878889

110751378516572

8.8Fo

447744

12421866323052937464

13710218433186043763603317542197253

121574140084184517224292279953328236394919451710529410594706714478824426964342

1090488

9.8Cs

0.2060.4390.918

1.63.667.27

12.5730.62

61105167262

9.8Fo

503837

13972099363559588392

1542324575358494914267944

10.9Cs

0.2690.573

1.22.074.749.4

16.33978

136218341469667920

114817062311314840365255648681369809

12661157731963423603

10.9Fo

65710931824274047447774

109622013732082467956427788611

107549138456173269199376262920319331398593467413562393643344754008847006

1017590117418213734571553119

12.9Cs

0.3150.671

1.42.435.511

19.14692

159255399549781

107713431997270436844723615075909520

1147814816184582297627620

12.9Fo

76912792134320755529098

1282823565375425476075218

103694125856162023202762233313307672373685466438546973658119752849882350991177

1190797137404316072371817480

Clasa de calitate suruburi de otel ISO 898-1

μ=0,20 Tabel de strangere pentru suruburi acoperite sau fara acoperire. Montaj uscat fara ungere (μ=coe�cient de frecare mediu)

μ=0,15 Tabel de strangere pentru suruburi fosfatate sau zincate, ungere super�ciala( in stare de livrare)(μ=coe�cient de frecare mediu)

μ=0,10 Tabel de strangere pentru suruburi fosfatate sau zincate, ungerea de buna calitate(μ=coe�cient de frecare mediu)

Ghid de strangere controlataAtentie!: Valorile din tabelele de mai jos sunt date dupa norma franceza NFE 25030 si sunt cu titlu orientativ!

In cazul utilizarii unui accesoriu atipic sau al unui cap de cheie crowfoot, cuplul aplicat nu este identic cu cuplul reglat

CALCULUL COEFICIENTULUI CORECTOR

Lungime Standard

Lungime Modi�cata

Cuplul aplicat= Cuplul reglat x Lungimea Modi�cata/Lungimea Standard

Cuplul aplicat

Cuplul reglat

Cuplul de strangere si forta de pretensionare

Ce este pretensionarea ?(Fo)

Tabelul de cupluri de strangere:

1. Care este coe�cientul de frecare?

2. Ce este ,,clasa de calitate"a surubului?

3. Cuplul de strangere(Cs)

Numai o pretensionare corecta are ca rezultat o asamblare �abila Pretensionare prea slaba: risc de desfacere a asamblarii Pretensionare prea mare: risc de deformare a pieselor asamblate sau ruperea surubului

Este forta, exprimata in Newton, care pune piesele sub presiune in timpul strangerii surubului

Ce este cuplul de strangere?(Cs)Cuplul este produsul dintr-e o forta aplicata la capatul unei parghii si lungimea parghiei

Cuplul = Forta x Lungimea(Nm) (Newton) (metru)

Cuplurile de strangere sunt calculate la 85% din limita de elasticitate (recomandari E25-030)

Alegeti din tabelul de valori in functie de surubul dumneavoastra(0.10, 0.15 sau 0.20) Exemplu: µ=0,10

Caracteristicile surubului depind de clasa lor de calitate( suruburile 12.9 sunt ,,cele mai performante")Alegeti coloana corespunzatoare clasei de calitate a surubului dumneavoastraExemplu : surub M10 calitate 8.8

Valorile cuplului de strangere sunt indicate pentru �ecare surub in Newton x metru(N.m)In exemplul surubului ales mai sus (M10 grupa8.8) vom aplica un cuplu de strangere de 36N.m pe surub

Tabele de conversieUnitatea de masura internationala este N.m(Newton x metru)

Conversiuni din N. m

Conversiuni din kgf. m

Conversiuni din lbf. in

1N.m = 0,102kgf. m1N.m = 0.738lbf. ft1N.m = 8,851lbf. in1N. m = 141,61ozf. in1kgf.m = 9.81N.m1kgf.m = 7.23lbf.ft1kgf.m = 86.8lbf.in1lbf. in =0.1129N.m1lbf. in =0.0115kgf. m1lbf. in =0.083lbf. ft1lbf. in =16ozf. in

Newton - metru in Kilogram - forta metru Newton - metru in Livra - forta piciorNewton - metru in Livra - forta inchNewton-metru in Uncie - forta inchKilogram-forta metru in Newton - metruKilogram-forta metru in Livra - forta piciorKilogram-forta metru in Livra - forta inchLivra-forta inch in Newton - metruLivra-forta inch in Kilogram - forta metruLivra-forta inch in Livra - forta piciorLivra-forta inch in Uncie - forta inch