Nord-Lock Group Nord-Lock Steel Construction Washers | User Guide

Bruk veiledningen vår

Bruk vår felles guide for å hjelpe deg med å bruke Nord-Lock konstruksjonsskiver i stål riktig.

Lenke til fullversjonen av brukermanualen for Nord-Lock stålkonstruksjonsskiver.

Gjennomgående hull

Gjennomgående hull krever bruk av to par Nord-Lock SC-skiver: ett par for å sikre bolten og ett par for å sikre mutteren. Drei begge festeelementene for å lukke kamene på begge skivepar før tiltrekking for å minimere setninger. Hold bolten fast mens mutteren tiltrekkes.

Design der Nord-Lock SC-skiver ikke anbefales

  • Med flatskiver
  • Når anleggsflaten ikke er låst på plass
  • Når annleggsflaten er hardere enn skivene
  • Ved svært myke anleggsflater - for eksempel tre og plast
  • For applikasjoner med ekstreme setninger
  • Når det ikke er noe klemkraft i forbindelsen

Torque Guidelines Steel Construction Washers, Table 1

Tightening torques to achieve the preloading force for bolting assemblies that originally corresponded to k-class K1 (usually System HV according to EN 14399-4 or EN 14399-8).

    Torque method
Bolt size Product name Tightening torque
MTM,SC [Nm]		 Preloading force 1) without retightening
Fp,C,red* [kN] (90%)		 Preloading force
Fp,C* [kN]


M12

 NL12SC 165 45 50


M16

 NL16SC 400 90 100


M20

 NL20SC 800 144 160


M22

 NL22SC 1.100 171 190


M24

 NL24SC 1.300 198 220


M27

 NL27SC 1.900 261 290


M30

 NL30SC 2.300 315 350


M36

 NL36SC 4.050 459 510

1) Differentation between Fp,C,red* and Fp,C* is only relevant for bolted categories B and C

 

Torque Guidelines Steel Construction Washers, Table 2

Pre-tightening torque for the combined method to achieve the preloading force for bolting assemblies that originally corresponded to k-class K1 (usually System HV according to EN 14399-4 or EN 14399-8).

    Combined method 1)
Bolt size Product name Tightening torque
MCM,SC [Nm]		 Preloading force
Fp,C [kN]


M12

 NL12SC 120 59


M16

 NL16SC 290 110


M20

 NL20SC 510 172


M22

 NL22SC 720 212


M24

 NL24SC 880 247


M27

 NL27SC 1.300 321


M30

 NL30SC 1.700 393


M36

 NL36SC 2.700 572

1) For additional rotation angles  EN 1090-2 Table 21 applies

 

Torque Guidelines Steel Construction Washers, Table 3

Additional rotation for the second step in the combined method (8.8 and 10.9 bolts).

Total nominal thickness "t" of parts to be connected (including all packs and washers)
d = bolt diameter		 Further rotation to be applied, during the second step of tightening
Degress Part turn


t > 2d

 60 1/6


2d ≤ t < 6d

 90 1/4


6d ≤ t ≤ 10d

 120 1/3


10d < t

 No recomendations

Tightening angles when using the combined method varies depending on the clamp length, (t), in relation to bolt diameter, (d).

Torque Guidelines Steel Construction Washers, Table 4

Additional rotation for the second step in the combined method (8.8 and 10.9 bolts).

Designation Nominal diameter
Torque method

Tightening torque MT,SC,sec [Nm]


NL12SC

 M12 80


NL16SC

 M16 200


NL20SC

 M20 360


NL22SC

 M22 520


NL24SC

 M24 640


NL27SC

 M27 1.000


NL30SC

 M30 1.320


NL36SC

 M36 2.240

 

 

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