MGN rails, what is precision class and prestress (or preload)?

Many people have seen people on blogs or social networks who criticize this or that brand or this or that retailer because the MGN rails that they have purchased do not suit them. Do they know the precision classes or prestresses of the rails they purchased? The answer to this question is simply no because they don't know what it is and like 99% of online experts they know everything but especially nothing!...

We will therefore give you the necessary explanations on precision classes and prestressing in order to enlighten you on this subject and above all to help you purchase the MGN rail necessary for your needs.

Precision classes of MGN rails

Linear rails are available in three precision classes. The standard class is class C which corresponds to what we have in stock.

Accuracy class table (in mm):

Tolerances in mm

Precision

C

H

P

H side tolerance

+/-0.04

+/-0.02

+/-0.01

N side tolerance

+/-0.04

+/-0.025

+/-0.015

Variation on H

0.03

0.015

0.007

Variation on N

0.03

0.02

0.001

Rail parallelism table in operation (in micrometers):

Parallelism of face C relative to face A

Parallelism of side D relative to side B

Precision

Rail length (in mm)

<50

<80

<125

<200

<250

<315

<400

<500

<630

<800

<1000

C

12

13

14

15

16

17

18

19

20

22

23

H

6

7

8

9

10

11

11

12

13

14

16

P

2

3

4

4

5

5

6

6

7

8

9

Prestress (or preload) levels

The preload level we keep in stock is the standard Z0 level (guidance with medium load and high precision)

Precharge

Code

Preload level

Operating conditions

Light preload

ZF

From 4 to 10 microns

Very gentle guidance / low shock / low precision

Average preload

Z0

0

Guidance with medium load / high precision

High preload

Z1

0.02 C

Guidance with high rigidity / significant vibrations and shocks

Lubrication of MGN rails

Depending on the use of your rails, you can lubricate them with oil or grease.

Lubrication with grease

The MGN rails should be lubricated with lithium soap grease, we recommend lubricating them approximately every 100km.

For grease lubrication we use this grease:

https://www.dllub.com/graisse-multi-usage-extreme-pressions/163-869-graisse-total-ep-2-lithium-complex-3425901003078.html#/35-conditionnement-400_g

 

Lubrication with oil

It is recommended to use an oil with a viscosity between 30 and 150 cst.

For oil lubrication we use this oil:

https://www.dllub.com/huile-de-glissiere/117-672-huile-pour-glissiere-g-68.html#/21-conditionnement-1_litre

Conclusion on the precision classes and prestressing of MGN rails

We hope that these details will allow you to better choose MGN rails according to your needs and therefore avoid errors.

Do not hesitate to contact us with any questions.

Add a comment

Your cookie settings

This store asks you to accept cookies for performance, social media and advertising purposes. Social media and advertising cookies of third parties are used to offer you social media functionalities and personalized ads. Do you accept these cookies and the processing of personal data involved?

Cookies nécessaires
Les cookies nécessaires contribuent à rendre un site web utilisable en activant des fonctions de base comme la navigation de page et l'accès aux zones sécurisées du site web. Le site web ne peut pas fonctionner correctement sans ces cookies.
Cookie name Provider Purpose Expiry
PrestaShop-# imprimante-3d-service.com This cookie helps keep user sessions open while they are visiting a website, and help them make orders and many more operations such as: cookie add date, selected language, used currency, last product category visited, last seen products, client identification, name, first name, encrypted password, email linked to the account, shopping cart identification. 480 hours
PrestaShop-# imprimante-3d-service.com Ce cookie permet de garder les sessions de l'utilisateur ouvertes pendant leur visite, et lui permettre de passer commande ou tout un ensemble de fonctionnement tels que : date d'ajout du cookie, langue sélectionnée, devise utilisée, dernière catégorie de produit visité, produits récemment vus, accord d'utilisation de services du site, Identifiant client, identifiant de connexion, nom, prénom, état connecté, votre mot de passe chiffré, e-mail lié au compte client, l'identifiant du panier. 480 heures
Necessary cookies
Necessary cookies help make a website usable by enabling basic functions like page navigation and access to secure areas of the website. The website cannot function properly without these cookies.
Cookie name Provider Purpose Expiry
PrestaShop-# imprimante-3d-service.com This cookie helps keep user sessions open while they are visiting a website, and help them make orders and many more operations such as: cookie add date, selected language, used currency, last product category visited, last seen products, client identification, name, first name, encrypted password, email linked to the account, shopping cart identification. 480 hours
PrestaShop-# imprimante-3d-service.com Ce cookie permet de garder les sessions de l'utilisateur ouvertes pendant leur visite, et lui permettre de passer commande ou tout un ensemble de fonctionnement tels que : date d'ajout du cookie, langue sélectionnée, devise utilisée, dernière catégorie de produit visité, produits récemment vus, accord d'utilisation de services du site, Identifiant client, identifiant de connexion, nom, prénom, état connecté, votre mot de passe chiffré, e-mail lié au compte client, l'identifiant du panier. 480 heures
Cookies marketing
Les cookies marketing sont utilisés pour effectuer le suivi des visiteurs au travers des sites web. Le but est d'afficher des publicités qui sont pertinentes et intéressantes pour l'utilisateur individuel et donc plus précieuses pour les éditeurs et annonceurs tiers.
Cookies marketing
Les cookies marketing sont utilisés pour effectuer le suivi des visiteurs au travers des sites web. Le but est d'afficher des publicités qui sont pertinentes et intéressantes pour l'utilisateur individuel et donc plus précieuses pour les éditeurs et annonceurs tiers.
Content not available in your area