Lubricants are called materials of a special variety, used to reduce the wear of various kinds of nodes during friction of their structural elements. Products of this type may vary primarily in consistency. The operational characteristics of such tools and the scope of their use depend on this parameter. Very often in industry, as well as in car components, for example, NLGI 2 greases are used.
Classification and manufacturers
NLGI is an international lubricant classification system developed by the American nonprofit organization National Lubricating Grease Institute. This corporation was created in the USA in the 30s of the last century. At the moment, it includes many different kinds of research, training, service organizations.
Today, NLGI 2 greases are supplied to the market by well-known companies. For example, if you wish, in our time you can purchase such materials of brands:
The first parameter that the National Lubricating Grease Institute operates on is the consistency or density of the lubricants. To test such materials in the laboratories of this corporation, a working penetration technique is used. Specialists of the organization check the density of the material using a special type of device — a penetrometer with a cone. This device is lowered for 5 seconds in a grease preheated to 25 ° C. Next, the immersion depth of the cone is measured.
Scope of use
Lubricants of the NLGI classes from 000 to 6 can be sold on the market today. The most liquid materials of this variety are used in systems with a small cross-section of the supply channels. Solid lubricants can be used, for example, for open gears.
Materials of class NLGI 2 may be used in a wide variety of components and mechanisms. At the moment, this class of greases is the most popular and common. Most often, such tools are used in the bearings of cars and trucks.
Composition and dosage
Materials of this variety are usually made based on ISOSIN ™ base oils. Also in their composition may include the following ingredients:
Color materials of this class, depending on the brand, may have brown, yellow or blue.
Of course, the use of such oils in mechanisms should be in sufficient quantities to reduce friction. Dosages of NLGI 2 oils depend on which particular unit they are used in. When using such tools in this regard, one should be guided, first of all, by the passport and recommendations from the manufacturer of this particular device.
This type of grease is designated by the abbreviation NLGI - from the name National Lubricating Grease Institute. After the letters in the marking is put the number 2 - a specific class of material.
Quality requirements
Compared to conventional lubricating oils, plastic NLGIs have a longer service life in various kinds of units and mechanisms. Of course, manufacturers involved in the manufacture of such materials must comply with certain requirements when they are released. Otherwise, the required class of finished products will not be assigned. At the outlet, the grease must fully comply with NLGI standards.
NLGI 2 materials must satisfactorily lubricate components and mechanisms, including at high temperatures. High requirements are also imposed on their resistance, degree of evaporation, oxidation, and viscosity change. Such means should protect the bearings and other components from corrosion and wear as efficiently as possible.
Delo NLGI 2 Materials: Specifications
Lubricants of this brand are produced by the American corporation Chevron, one of the largest in the world. For example, the multipurpose Chevron NLGI 2 Delo Greases EP grease manufactured by this manufacturer is very popular on the market. Technical characteristics the material of this brand has the following:
The operating temperature regime of this material ranges from -30 ° C to 117 ° C.
Among other things, the composition of lithium greases NLGI EP 2 of this brand includes special extreme pressure additives containing sulfur and phosphorus. Such additives are corrosive to non-ferrous metals. Therefore, it is not worth using Chevron NLGI 2 Delo for worm gears that use copper-based metals, for example.
Using Chevron Delo Greases EP NLGI 2
It is recommended to use this oil:
in mainline trucks, including automatic central lubrication systems and wheel bearings;
in off-road vehicles used in agriculture, mining and agricultural industries;
in commercial vehicles, including buses operating in harsh conditions.
Also, such Delo NLGI 2 greases can be used in cars with high-speed wheel bearings.
Shell NLGI 2 Greases
The funds of this brand are issued by the Dutch company of the same name. Many of Shell's lubricants are not based on a lithium thickener, but inorganic non-soap. That is, with increasing temperature, the consistency of such products does not change too much.
If desired, consumers can purchase, for example, NLGI 2 greases from this manufacturer:
- Shell Gadus S2 U460L 2 heat-resistant.
- Shell Gadus S2 V100 2, which can also be used for sealed bearings "for life".
- Shell Gadus S2 V145KP 2, designed for use in cold climates.
All of these products are distinguished by excellent performance and have earned excellent customer reviews.
Technical specifications Shell Gadus S2 U460L 2
Like Delo Grease EP NLGI 2 grease, this material has been supplied to the domestic market for a long time. Previously, this product was called Shell Darina R 2. Shell Gadus S2 U460L 2 is made from mineral oils using inorganic thickeners. Technical characteristics it has approximately the following:
operating temperature - from -10 C to 180 ° C;
viscosity at 100 ° C - 35;
viscosity at 40 ° C - 460.
The use of Shell Gadus S2 U460L 2 and its advantages
This tool can be used in a variety of industrial equipment, cars, commercial and trucks. Since this material is made on a base oil with a high viscosity, it can also be used in highly loaded low speed bearings.
The main advantage of this lubricant is that it can be used even at very high temperatures. Under such conditions, it does not begin to melt as it does with similar products based on soap thickeners. With a change in temperature, the consistency of such a product practically does not change. In addition, this material is able to maintain its sealing ability even with strong vibrations.
What other NLGI 2 greases are
Brands and varieties of materials of this class are produced by modern industry, so there are many. Of course, most often these are lubricants intended for various industrial mechanisms, special equipment and automobiles. But on sale today there are also means of this category, intended for use in food equipment.
An example of such a material is NLGI 2 SKF LGFP 2 grease. This non-toxic product is made on the basis of white medical oil using a complex aluminum soap. Such material, among other things, is food compatible.
SKF LGFP 2 grease can be used, for example:
The advantages of this lubricant include, among other things, a high degree of water resistance and a long service life. A great advantage of this material is also considered a neutral pH value.