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

Utilice nuestra guía

Utilice nuestra Guía del usuario para montar correctamente las arandelas de construcción en acero Nord-Lock.

Enlace a la versión completa del Manual del usuario de las arandelas de construcción de acero Nord-Lock.

Agujeros pasantes

Los orificios pasantes requieren dos pares de arandelas Nord-Lock SC: un par para asegurar el perno y el otro para asegurar la tuerca. Gire ambos elementos para cerrar las levas de ambos pares de arandelas antes de apretar para minimizar los asentamientos. Mantenga el perno asegurado mientras aprieta la tuerca.

Diseños en los que no se recomiendan las arandelas Nord-Lock SC

  • Con arandelas planas
  • Cuando las superficies de contacto no están fijadas en su lugar
  • Cuando las superficies de contacto son más duras que las arandelas
  • Con superficies de contacto muy blandas, por ejemplo, madera y plástico
  • Para aplicaciones con asentamientos extremos
  • Cuando no hay fuerza de sujeción en la unión

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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