Nord-Lock originale skiver

Nord-Lock har udviklet den originale kilelåsningsteknologi til sikring af boltede samlinger, selv når de udsættes for store vibrationer og dynamiske belastninger. På grund af kilen under bolthovedet og møtrikken er det umuligt for vores produkter at løsne sig utilsigtet.

Nord-Lock Steel Washers

Applications General steel applications
Material standard EN 1.7182
Size range M3-M130
#5 to 5"
Corrosion resistance Minimum 1,000 hours in salt spray test (according to ISO 9227)
Hardening Through hardened
Washer hardness* ≥ 465HV1
Coating Delta Protekt® KL100 zinc flake coating
Bolt grades Up to 12.9
Temperature range*** -50°C to 200°C
Product designation NL
NLsp
Laser marking type code flZn

 

* Washer hardness must be greater than the hardness of the mating surfaces in order to assure its mechanical function.

*** Temperature recommendations are based on information from the raw material supplier and testing. The locking function is not affected within the specified range.

Nord-Lock Stainless Steel Washers

Applications General stainless steel applications
Material standard EN 1.4404
Size range M3-M80 
#5 to 3 1/8"
Corrosion resistance PREN 27**
Hardening Surface hardened
Washer hardness* ≥ 520HV0,05
Bolt grades Up to A4-80
Temperature range*** -160°C to 500°C
Product designation NLss
NLspss
Laser marking type code SS

 

* In order to assure the unique mechanical locking function of the Nord-Lock washers, the hardness of the mating surfaces must be lower than the hardness of the Nord-Lock washers. 

** PREN (Pitting Resistance Equivalent Number) = %Cr + 3,3x%Mo + 16x%N. Figures in table valid for base material.

*** Temperature recommendations based on information from the raw material supplier and from tests. Locking function not affected within the specification.

Nord-Lock 254 SMO® Washers

Applications Corrosive environment – chloride rich environments, offshore, pumps, heat exchangers, nuclear, food, medical, processing
Material standard EN 1.4547
Size range M3-M39
#5 to 1 1/2"
Corrosion resistance PREN 45**
Hardening Surface hardened
Washer hardness* ≥ 600HV0,05
Bolt grades Up to A4-80
Temperature range*** -160°C to 500°C
Product designation NLss-254
NLspss-254
Laser marking type code 254

 

* In order to assure the unique mechanical locking function of the Nord-Lock washers, the hardness of the mating surfaces must be lower than the hardness of the Nord-Lock washers. 

** PREN (Pitting Resistance Equivalent Number) = %Cr + 3,3x%Mo + 16x%N. Figures in table valid for base material.

*** Temperature recommendations based on information from the raw material supplier and from tests. Locking function not affected within the specification.

 

Nord-Lock Alloy C-276 Washers

Applications Acidic environment – chemical industry, evaporators, offshore, downhole tooling
Material standard EN 2.4819 or equivalent
Size range M4-M20
#8 to 1 1/2"
Corrosion resistance PREN 68**
Hardening Surface hardened
Washer hardness* ≥ 520HV0,05
Temperature range*** -160°C to 500°C
Product designation NLss-276
NLspss-276
Laser marking type code 276

 

* In order to assure the unique mechanical locking function of the Nord-Lock washers, the hardness of the mating surfaces must be lower than the hardness of the Nord-Lock washers. 

** PREN (Pitting Resistance Equivalent Number) = %Cr + 3,3x%Mo + 16x%N. Figures in table valid for base material.

*** Temperature recommendations based on information from the raw material supplier and from tests. Locking function not affected within the specification.

Nord-Lock Alloy 718 Washers

Applications High temperatures – gas turbines, turbo charges, incinerators
Material standard EN 2.4668 or equivalent
Size range M4-M20
#5 to 1 1/2"
Corrosion resistance PREN 29**
Hardening Surface hardened
Washer hardness* ≥ 620HV0,05
Temperature range*** -160°C to 700°C
Product designation NLss-718
NLspss-718
Laser marketing type code 718

 

* In order to assure the unique mechanical locking function of the Nord-Lock washers, the hardness of the mating surfaces must be lower than the hardness of the Nord-Lock washers. 

** PREN (Pitting Resistance Equivalent Number) = %Cr + 3,3x%Mo + 16x%N. Figures in table valid for base material.

*** Temperature recommendations based on information from the raw material supplier and from tests. Locking function not affected within the specification.

All types of Nord-Lock washers

Material type
Steel Stainless
steel (ss)
254 SMO® ALLOY 
C-276
ALLOY
718
Applications
General steel applications General stainless steel applications Corrosive environment – chloride rich environments, offshore, pumps, heat exchangers, nuclear, food, medical, processing Acidic environment – chemical industry, evaporators, offshore, downhole tooling High temperatures – gas turbines, turbo charges, incinerators
Material standard
EN 1.7182 EN 1.4404 EN 1.4547 EN 2.4819 or equivalent EN 2.4668 or equivalent
Size range

M3-M130

#5 to 5"

M3-M80

#5 to 3 1/8"

M3-M39

#5 to 1 1/2"

M4-M20

#8 to 1 1/2"

M4-M20

#5 to 1 1/2"

Corrosion resistance
Minimum 1,000 hours in salt spray test (according to ISO 9227) PREN 27** PREN 45** PREN 68** PREN 29**
Hardening
Through hardened Surface hardened Surface hardened Surface hardened Surface hardened
Washer hardness*
≥ 465HV1 ≥ 520HV0,05 ≥ 600HV0,05 ≥ 520HV0,05 ≥ 620HV0,05
Coating
Delta Protekt® KL100 zinc flake coating - - - -
Bolt grades
Up to 12.9 Up to A4-80 Up to A4-80 Up to A4-80 Up to A4-80
Temperature range***
-50°C to 200°C -160°C to 500°C -160°C to 500°C -160°C to 500°C -160°C to 700°C
Product designation
NL
NLsp
NLss
NLspss
NLss-254
NLspss-254
NLss-276
NLspss-276
NLss-718
NLspss-718
Laser marking type code
flZn SS 254 276 718

 

* In order to assure the unique mechanical locking function of the Nord-Lock washers, the hardness of the mating surfaces must be lower than the hardness of the Nord-Lock washers. 

** PREN (Pitting Resistance Equivalent Number) = %Cr + 3,3x%Mo + 16x%N. Figures in table valid for base material.

*** Temperature recommendations based on information from the raw material supplier and from tests. Locking function not affected within the specification.

Udvælgelsesguide

Appikations parameter
Stål Rustfrit stål SS 254 SMO® ALLOY 
C-276
ALLOY
718
Stål type
EN 1.7182 EN 1.4404 EN 1.4547 EN 2.4819 eller lignende EN 2.4668 eller lignende
Eksempler på applikationer
Generelle stål applikationer Generelle rustfri stål applikationer. Ikke klorholdige / sure miljøer Generelle saltvands applikationer, pumper, klorholdige applikationer, varmevekslere, kernekraft, afsaltning, fødevare- og medicinal udstyr Generelle sure miljøre, proces- og kemisk industri, fordampere, offshore ”down hole” værktøj Applikationer men høje temperature, gas turbine, turboladere,forbrændingsanlæg
Findes til bolt størrelse

M3 til M130

#5 til 5"

M3 til M80

#5 til 3 1/8"

M3 til M39

#5 til 1 1/2"

M3 til M39 Tilgængelig ved henvendelse

#5 til 1 1/2" Tilgængelig ved henvendelse

M3 til M39 Tilgængelig ved henvendelse

#5 til 1 1/2" Tilgængelig ved henvendelse

Skive typer

Standard yder diameter (NL3 til NL130)

Stor yder diameter (NL3,5sp til NL36sp)

Standard yder diameter (NL3ss til NL80ss)

Stor yder diameter (NL3,5spss til NL30spss)

Standard yder diameter (NL3ss-254 til NL39ss-254)

Stor yder diameter (NL3,5spss-254 til NL27spss-254)

Standard yder diameter (NL3ss-276 til NL39ss-276)

Stor yder diameter (NL3,5spss-276 til NL27spss-276)

Standard yder diameter (NL3ss-718 til NL39ss-718)

Stor yder diameter (NL3,5spss-718 til NL27spss-718)

Behandling / Overfladebehandling
Delta Protekt® base coat (KL100) og top coat (VH302GZ) Overflade hærdet Overflade hærdet Overflade hærdet Overflade hærdet
Skive hårdhed*
≥ 465HV1 ≥ 520HV0,05 ≥ 600HV0,05 ≥ 520HV0,05 ≥ 620HV0,05
Korrosionsbestandighed
Minimum 1,000 timer i salttåge test (iflg. ISO9227) PREN 27** PREN 45** PREN 68** PREN 29**
Bolt kvaliteter
Op til 12.9 Op til A4-80 Op til A4-80 Op til A4-80 Op til A4-80
Temperatur område***
-50°C til 200°C -160°C til 500°C -160°C til 500°C -160°C til 500°C -160°C til 700°C

 

* For at være sikker på af få Nord-Lock´s unikke låsefunktion skal hårdheden på den overflade man spænder imod være blødere end hårdheden på Nord-Lock skiverne (Se ovenstående tabel). 

** PREN (Pitting Restistance Equivalent Number) =%Cr + 3,3X%Mo+16X%N. Tallene I tabellen gælder for grundmaterialet.

*** Temperatur anbefalinger er baseret på information fra råvareleverandøren. Låsefunktionen bliver ikke påvirket inden for det specificerede område.

Skive hårdhed

For at være sikker på af få Nord-Lock´s unikke låsefunktion skal hårdheden på den overflade man spænder imod være blødere end hårdheden på Nord-Lock skiverne.


Skive type Området Zinc Flake overflade-behandlet flZnnc – 600 Ikke overflade-behandlet
Stål skiver (Gennemhærdet) NL3 - NL42
NL45 - NL130
≥ 465 HV1
≥ 465 HV1
 
Rustfrie skiver (Overflade hærdet) NL3ss - NL80ss   ≥ 520 HV0.05
SMO 254® skiver NL3ss-254 - NL80ss-254   ≥ 600 HV0.05

 

Hårdheds konverterings tabel

Vickers
HV
Brinell
HB
Rockwell
HRC
Rockwell
HRA
8.8
bolt
10.9
bolt
12.9
bolt
300 285 29,8 65,5 |    
310 295 31,0 65,8 |    
320 304 32,2 66,4 | 320 HV  
330 314 33,3 67,0 | |  
335 319 33,9 67,3 335 HV |  
340 325 34,4 67,6   |  
350 333 35,5 68,1   |  
360 342 36,6 68,7   |  
370 352 37,7 69,2   |  
380 361 38,8 69,8   380 HV  
385 366 39,3 70,1     385 HV
390 371 39,8 70,3     |
400 380 40,8 70,8     |
410 390 41,8 71,4     |
420 399 42,7 71,8     |
430 409 43,6 72,3     |
435 414 44,1 72,5     435 HV
440 418 44,5 72,8      
460 437 46,1 73,6      
480 (456) 47,7 74,5      
500 (475) 49,1 75,3      
520 (494) 50,5 76,1      
540 (513) 51,7 76,7      

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