locking nuts

How to express the pitch for the different thread types?

How to express the pitch for the different thread types?

Often people are confused on how exactly to express a certain thread size.
The most mistakes are made when people have to work with a different measurement system then they are used to.
The imperial and metric thread systems use a different way of indicating the pitch, except for the imperial thread type BA, for which the pitch is indicated as the metric thread system.

For the metric  and imperial BA thread system, the pitch is a single thread measured and expressed in millimetres.
For example M10x1,5. The number 1,5 means that the distance between a point on 2 adjecent threads measures 1,5 mm.

For the imperial thread systems, UNF-UNC-BSF-BSW, the pitch is expressed in numbers of threads per inch or tpi.
For example 1/4-20. The number 20 means that there are 20 threads per inch or 20TPI.

Des Fixations rapides utilisées sur les énergies vertes !

Des Fixations rapides utilisées sur les énergies vertes !

Les Fixations énergies vertes fournis par Anemo Engineering vous relient au Monde de demain !

Les fixations énergies vertes offrent une valeur ajoutée certaine pour de nombreuses applications dans le secteur des énergies renouvelables tels que les éoliennes et panneaux solaires photovoltaïques.

[caption id="attachment_4920" align="aligncenter" width="589"]Applications energies vertes Applications Fixations énergies vertes[/caption]

Les fixations utilisées sur ces applications d'énergie renouvelable sont les écrous auto bloquants, les écrous Nylstop et les quarts de tour.

[caption id="attachment_4922" align="aligncenter" width="327"]Fixations energies vertes Fixations énergies vertes[/caption]

[caption id="attachment_4958" align="alignleft" width="300"]Fixations energies vertes cadres photovoltaïques Fixations energies vertes cadres photovoltaïques[/caption]

Anemo garde en stock ces fixations énergies vertes afin d'aider au plus vite ses clients. Pour toutes questions et demandes concernant ces produits, veuillez contacter notre équipe. info@anemo.eu

Que sont les écrous Frenvis ?

Que sont les écrous Frenvis ?

Les écrous Frenvis sont des écrous auto freinés. Les écrous Frenvis est composé de 2 pièces, l'écrou et la bague ressort. La partie haute de l'écrou Frenvis comporte plusieurs fenten radiales et une gorge qui reçoit la bague ressort. La bague ressort assure ke freinage en resserant la partie supérieur fendue de l'écrou Frenvis.

[caption id="attachment_4720" align="aligncenter" width="372"]Ecrou frenvis Ecrous frenvis[/caption]

 

Les écrous Frenvis  ont été créé en 1950 et ont été commercialisé après des tests aéraonautiques et navales. Ces test ont permis de valider la qualité sur différents critères comme :

  • La constance du couple de freinage après démontages répétés et absence d'altération des filets.
  • Résistance à la rupture du filetage de l'écrou
  • Tenue à la vibration.

Les avantages des écrous Frenvis sont les suivants :

  1. Escellente tenue du couple de freinage assuré par la bague ressort, même après démontage à répétition.
  2. Compensation des tolérances des vis et des modifications dimensionnelles de filetage dues à l'usure et aux variations de température.
  3. Economique et sûr
  4. Différentes matières disponibles (acier, inox et bronze d'aluminium).

Les écrous Frenvis sont utilisés dans des applications d'assemblages mécaniques ( organes de suspension, roulement, boîte de vitesse, pont de transmission). Les principaux secteurs d'activités qui emploient les écrous Frenvis sont :

  • Les transoports (véhicules utilitaires, métro, RER, Chemins de fer)
  • Défenses ( Militaire, Navale )
  • Manutention
  • Aéronautique et aérospatial

Les écrous Frenvis sont disponibles en tous diamètres à partir de 4mm.

Pour toutes informations sur les écrous frenvis, veuillez nous contacter. info@anemo.eu

Qu'appelle-t-on "Ecrou 2 fentes superposées ?

Qu'appelle-t-on "Ecrou 2 fentes superposées ?

Les écrous 2 fentes superposées sont des écrous autobloquant.

Ecrou HFR

Les écrous 2 fentes superposées sont disponibles en plusieurs matières comme des nuances d’acier zingué et d’inox.

Beaucoup utilisé dans le domaine ferroviaire, les écrous 2 fentes superposées sont idéales par leur haute résistance mécanique. Les écrous 2 fentes superposées ont aussi une très grande résistance à la corrosion.

Les écrous 2 fentes superposées sont disponibles en stocks sous la référence des Joining Lock Nuts.

Veuillez retrouver ci-dessous le liens du site Joining Lock Nuts pour pouvoir télécharger le catalogue inclus les écrous 2 fentes superposées :

Vous retrouverez les écrous 2 fentes superposées et pourrez identifier les n°de référence JL.

Si vous avez des questions sur les écrous 2 fentes superposées, n’hésitez pas à nous contacter.

Qu'est ce que les écrous HFR ?

Qu'est ce que les écrous HFR ?

Les écrous HFR sont des écrous autofréinés à 2 fentes.

[caption id="attachment_3906" align="alignleft" width="300"]Ecrou HFR écrous HFR[/caption]

Les écrous HFR sont disponibles en plusieurs matières comme des nuances d'acier zingué et d'inox.

Beaucoup utilisé dans le domaine ferroviaire, les écrous HFR sont idéales par leur haute résistance mécanique. Les écrous HFR ont aussi une très grande résistance à la corrosion.

Les écrous HFR sont disponibles en stocks sous la référence des Joining Lock Nuts.

Veuillez retrouver ci-dessous le liens du site Joining Lock Nuts pour pouvoir télécharger le catalogue inclus les écrous HFR :

Vous retrouverez les écrous HFR et pourrez identifier les n°de référence JL.

Si vous avez des questions sur les écrous HFR, n'hésitez pas à nous contacter.

 

 

Qu'est ce que des écrous autofreinés ?

Qu'est ce que des écrous autofreinés ?

Les écrous autofreinés ont été développé en 1954. Les écrous autofreinés sont encore fabriqués de nos jours avec une plus vaste gamme d'écrous autofreinés. Avec des progrès importants accomplis dans cette technologie, les écrous autofreinés surpassent toujours ses produits concurrents où parfois la simplicité l’emporte. Les écrous autofreinés  réunissent à la fois une très grandes résistance aux vibrations et sont réutilisables.

[caption id="attachment_5080" align="alignnone" width="300"]Ecrous autofreinés SNEP Ecrous autofreinés [/caption]

Le mécanisme principale des écrous autofreinés est le suivant :

La fonction d'autofreinage est obtenue par une ou deux fentes radiales et une déformation axiale.

Lors du montage d'une vis, les écrous autofreinés générent un frottement dans les filets qui empêche les écrous autofreinés de se dévisser.

Anemo  propose à ses clients 3 marques d'écrous autofreinés :

Les écrous autofreinés sont disponibles en stock chez Anemo, n'hésitez pas à vérifier.

Le domaine d'application principal des écrous autofreinés et le ferroviaire.

 

 

How to add a locking mechanism to a slider?

How to add a locking mechanism to a slider?

Hello,

please help in this technical issue.
a customer is looking for adding the functionality of a locking mechanism to his slider.

1) Does anybody know of a standard slider that has this feature integrated?

 2) Has somebody other ideas of integrating the locking feature?

Idea is to integrate locking between the 2 sliding part(black features). As you see one end is closed. so I need to lock the other end.

Hi Bart,

 

 

 

The Locking mechanism will be used when it is in close position. The sliding part is connected to a removable rack frame. I have already control the movement of the mechanism in up/down, cross car . As I mentioned one side of the slide is closed all I need is to find a locking mechanism. The locking mechanism should be strong enough to prevent the slide from rattling back and forth.

 

 

 

Below please find an screen shot of the sliding mechanism in the main system.

 

Available alternative to ESNH80 snep nut / ESN H80 snep nut

Available alternative to ESNH80 snep nut / ESN H80 snep nut

The availability of ESNH80 snep nut/ ESN H80 snep nut is strongly diminishing, and eventually there won't be any nuts according to ESNH80 / ESN H80 available.
We started with an alternative to ESNH80 / ESN H80 in the Joining Lock Nut series.

For more details on the Joining Lock Nut series, follow one of the links below:
Joining Lock Nut website, Joining Lock Nut Anemo webpage

These products are fully capable of replacing the nuts according to ESNH80 snep nut/ ESN H80 snep nut.
They have the same mechanical properties of ESNH80 snep nut/ ESN H80 snep nut, and are created with the same dimensioning of the  ESNH80 snep nut/ ESN H80 snep nut.

The new product line in the Joining Lock Nut series that replaces the ESNH80 snep nut/ ESN H80 snep nut,
is the line JLsl. All nuts according to this line have there reference starting with these 4 letters.

These products will soon be featured in our catalogs.
Below you can find the basic technical drawing on these products.
Might you have any questions, you can always contact our engineers.

JLsl technical drawing JLsl technical drawing

 

What is the standard finish of Joining Lock Nuts?

What is the standard finish of Joining Lock Nuts?

Joining Lock Nuts are available in various materials.
According to the material grade, the nuts have a standard finish.
The standard finishes can be found below

Steel Class 8 and Class 10, have as standard finsh a white lanthanum coating.
A2 grade nuts are left blank.
A4 grade nuts are standard finished with an antigalling Stanal 400, making them look more grey.

 

What is the maximum force a camloc gas spring can safely support when the locking shroud is in place?”

What is the maximum force a camloc gas spring can safely support when the locking shroud is in place?”

Question:

Customer is interested in the Econoloc variable pressure 10-23-300mm stroke model, and notice it is specified for a maximum force of 1200N.

Does this refer to the maximum force it can hold when fully extended and pressurised, without collapsing? And this is per single gas strut, correct

Answer:

The 10-23 Econoloc will withstand a minimum of 2500N on a 300 stroke spring without collapsing. This would allow a safety factor of at least 2.0, if the customer is using a single spring on the application. This safety factor would be reduced, if the customer is using a pair of springs on the application, but the safety of the application should be assessed with the extremely low likelihood of both springs losing pressure at the same time.

 

Please note that the Econoloc shroud is designed as a failsafe device for the one off case where the gas springs fitted are unable to  adequately support the application, and an additional locked out support is required to protect the operator from gas spring failure or application overload. The Econoloc should not be used repeatedly in the locked and overloaded condition and once overloaded, and/ damaged, should be replaced.

Which DTR part numbers do you have available for the JL nuts?

Which DTR part numbers do you have available for the JL nuts?

The Joining Lock nuts are widely used in the transport industry. Therefor our parts may get some specific part numbers by the company who implements them. We supply many parts for Alstom. As it is often not easy to source the correct part number, we have made a list of their part numbers that we have already supplied.

  • DTR0021373057 : ECROU H FR 1 FT.NFE25-411-M6-8 - Joining Lock nuts JLsM6x100CL8
  • DTR0021373187 : ECROU H FR 1 FT.NFE25-411-M8-8 - Joining Lock nuts JLsM8x125CL8
  • DTR0009907228 : ECROU H FR 2 FT.NFE25-411-M6-8 - Joining Lock nuts JLdM6x100CL8
  • DTR0009907232 : ECROU H FR 2 FT.NFE25-411-M8-8 - Joining Lock nuts JLdM8x125CL8
  • DTR0021371212 : ECROU 25409 A2 - Joining Lock nuts JLphM4x070A2
  • DTR00213721BC: ECROU H FR 1 FT.NFE25-411-M5-A2-70 - Joining Lock nut JLsM5x080A2

Which DTR part numbers do you have available for the SNEP nuts?

Which DTR part numbers do you have available for the SNEP nuts?

SNEP nuts are widely used in the transport industry. Therefor our parts may get some specific part numbers by the company who implements them. We supply many parts for Alstom. As it is often not easy to source the correct part number, we have made a list of their part numbers that we have already supplied.

  • DTR0000068664 : ECROU H FR D.A.1 FENTE M 6-100 - Snep ESNH100M6x100BL3
  • DTR0021373433 : ECROU H FR 1 FT.NFE25-411-M4-A2-70 - Snep ESNH130M4x070A2
  • DTR0021373436 : ECROU H FR 1 FT.NFE25-411-M8-A2-70 - Snep ESNH130M8x125A2
  • DTR0021371216 : ECROU 25409 A2 - Snep E25409M6x1,00A2
  • DTR00213721BC: ECROU H FR 1 FT.NFE25-411-M5-A2-70
    Snep ESNH100M5x080A2

Why should I use RoHS conform zinc plated instead of toxic cadmium plated parts?

Why should I use RoHS conform zinc plated instead of toxic cadmium plated parts?

Question:

do you have any data/technical specifications etc that demonstrates that the zinc plated components are an adequate alternative for the original cadmium plating. I realise the dimensions and strength are the same but am interested in the material properties, particularly corrosion resistance in Aluminium assemblies.

In order to approve the zinc plated components as an alternative I will need to have some official justification for the material change.

Also, I’m guessing from your previous email that all the cad plated fasteners are going to be phased out in the future. Is this the case, and do you know any rough timeline for phase out? I would prefer not to approve another cad plated fastener as a replacement only for that one to become obsolete in the near future.

Answer:

Cadmium plated parts perform better in corrosion tests.

The cadmium also performs as a lubrication when you install parts.

Those are the two main advantages.

The cadmium plated parts can be still used for aerospace parts.

They are however not allowed to be sold in industrial applications.

Please realize that Cadmium is a very toxic material.

If possible you should transfer to RoHS conform parts

Cadmium parts require a minimum PO quantity at this moment of 500 parts.  In the future it might be 2500 pieces.

I’m not guessing that they will be phased out as there hasn’t been found an alternative plating that performs as well as the cadmium plated parts.

What is the locking torque of a stainless steel joining lock nut?

What is the locking torque of a stainless steel joining lock nut?

the torque depends on the material class of the self locking nut

Standard threads Quality class tightening tension in the bolt locking torque Nm
torque kN 1st deturn 5th deturn
in Nm MIN (µ = 0,20) MAX (µ = 0,12) MIN MIN
M3x0,5 A2 or A4-70 1,06 1,13 1,81 0,15 0,50
A2 or A4-80 1,36 1,5 2,41
M4x0,7 A2 or A4-70 2,31 1,97 3,16 0,20 0,70
A2 or A4-80 3,01 2,63 4,21
M5x0,8 A2 or A4-70 4,43 3,19 5,11 0,30 1,50
A2 or A4-80 5,81 4,26 6,81
M6x1 A2 or A4-70 7,6 4,52 7,23 0,40 1,70
A2 or A4-80 10 6,03 9,64
M8x1,25 A2 or A4-70 17,6 8,23 13,17 0,60 2,80
A2 or A4-80 23,6 10,98 17,56
M10x1,5 A2 or A4-70 35,1 13,05 20,88 1,10 3,30
A2 or A4-80 46,6 17,4 27,84
M12x1,75 A2 or A4-70 60,9 18,96 30,34 1,90 4,00
A2 or A4-80 79,9 25,29 40,46
M14x2 A2 or A4-70 95,5 25,88 41,4 2,50 5,50
A2 or A4-80 126,5 34,5 55,2
M16x2 A2 or A4-70 147,5 35,33 56,52 3,50 7,70
A2 or A4-80 195,5 47,1 75,36
M18x2,5 A2 or A4-70 204 43,2 69,12 6,00 10,00
A2 or A4-80 270 57,6 92,16
M20x2,5 A2 or A4-70 286,5 55,13 88,2 8,50 14,50
A2 or A4-80 379,5 73,5 117,6

µ = 0,20 corresponds with 50% Re of the bolt
µ = 0,12 corresponds with 80% Re of the bolt
this is the norm NFE25-035

WHAT TORQUES ARE APPLIED ON THESE NUTS WHEN USED ON VALVES?

WHAT TORQUES ARE APPLIED ON THESE NUTS WHEN USED ON VALVES?

The locking torque for class 8 material locking nuts can be find in this table, they are according to the norm DIN EN ISO 2320

Standard threads tightening Locking torque in  N.m
torque 1st turn 1st deturn 5th deturn
in kN MAX MIN MIN
M3x0,5 2,2 0,43 0,12 0,08
M4x0,7 3,8 0,90 0,18 0,12
M5x0,8 6,2 1,60 0,29 0,20
M6x1 8,7 3,00 0,45 0,30
M8x1,25 15,9 6,00 0,85 0,60
M10x1,5 25,3 10,50 1,50 1,00
M12x1,75 36,7 15,50 2,30 1,60
M14x2 50 24,00 3,30 2,30
M16x2 68,2 32,00 4,50 3,00
M18x2,5 86,2 42,00 6,00 4,20
M20x2,5 110 54,00 7,50 5,30
M22x2,5 136 68,00 9,50 6,50
M24x3 159 80,00 11,50 8,00
M27x3 206 94,00 13,50 10,00
M30x3,5 253 108,00 16,00 12,00
Fine Threads tightening Locking torque in  N.m
torque 1st turn 1st deturn 5th deturn
in kN MAX MIN MIN
M8x1 17 6,00 0,85 0,60
M10x1 28,1 10,50 1,50 1,00
M10x1,25 26,6 10,50 1,50 1,00
M12x1,25 41 15,50 2,30 1,60
M12x1,50 38,3 15,50 2,30 1,60
M14x1,50 54,4 24,00 3,30 2,30
M16x1,5 72,7 32,00 4,50 3,00
M18x1,5 97,5 42,00 6,00 4,20
M20x1,5 122 54,00 7,50 5,30
M22x1,5 150 68,00 9,50 6,50
M24x2 173 80,00 11,50 8,00
M27x2 224 94,00 13,50 10,00
M30x2 280 108,00 16,00 12,00

Can we receive a printed catalogue?

When to use locking nuts

When to use locking nuts

Short clamp lengths

When the clamp length is relatively short, ratio Lk/d < 3. The short elongation of the screw can't compensate for settings that occur inside the goods. The consequence is that the clamp load will decrease or fully disappear in which case the screw-joint might fail.

Simmonds

Settings in the surface of joined materials

A major proportion of the clamp load can be lost due to settings in threads and joined material surfaces. The amount of settings is related to surface finish, material hardness and number of "joined surfaces". If the risk occurs of loosing clamp load due to large settings for example by dynamic loads or vibrations, a locking-nut should be used.

Example: Galvasised material has a soft coating

Soft materials

Locking nuts should be used when the screw joint consists of one or more soft materials. It is difficult to achieve and to maintain a high level of clamp load because the soft material deforms due to high surface pressure. This plastic deformation continues after the torque value has been applied to the screw. This again is a type of setting and might eventually lead to the complete loss of clamp load. Wood, plastics and aluminum are typical examples of soft materials.

Example: Other solution = apply a washer
Material starts to creep: Alu starts from 160°C// Steel starts from 240°C

Vibrations

If the clamp load is to low, dynamic loads normally lead to the loosening of the screw joint in ordinary applications. The use of a locking nut will in most cases prevent this process

Uncontrolled torque value/ method

It's impossible to create a specified clamp load without using proper "torque methods". The scatter will vary significant depending on used tools and the amount of operators involved over a period of time. The conclusion is that some of the screw joints will be "under torqued" and as a result might loosen. In this case locking nuts will reduce the risk of failure for screw joints with low initial clamp load.

80% of all bolts that brake are due to a too low clamp force.

Example: difficult reached places or bad tools -> locking torque will never be the same

Remember:

  • Bad connection can mean: a safety problem // hold of production
  • Dynamic forces make bolts easily brake via fatigue
  • Consequence is an unsatisfied customer of the end product