Lubrication tips for Swedish SKF bearings

Rust prevention performance

The grease used in SKF bearings must have an anti-rust effect, and the anti-rust agent should preferably be insoluble in water. Grease should have good adhesion to form an oil film on the surface of the steel, even if the grease is filled with water.

Mechanical stability

Grease becomes soft during machining and causes leakage. When there is a vibration application example, grease will be trapped inside the bearing by the bearing housing. If the mechanical stability of the grease is insufficient, the grease will be continuously thrown out of the bearing, which will cause mechanical collapse of the soap structure and destruction of the grease.

Oil seal

Oil seals are necessary to protect bearings and lubricants from external contamination, and no matter whether debris or moisture can penetrate into the bearings to prevent damage. Proper installation and maintenance is an important factor in the longest service life of the bearing. At the same time, attention must be paid to the cleanliness of the bearings, the correctness of the choice of bearings and the selection of appropriate installation and maintenance tools. Bearings must be protected from contaminants and moisture and must be properly installed and lubricated. The design of the bearing arrangement, the condition of the oil seal, the type of lubricant and the lubrication cycle, as well as the special maintenance play an important role.

Mixed grease

Never mix incompatible greases. If two incompatible greases are mixed, the consistency will usually soften and eventually damage may occur due to the loss of grease. If you don't know which type of grease the bearing originally used, you should first remove the old grease inside and outside the bearing to add grease.

Classification of oils and fats

According to temperature and working conditions: grease can be classified according to their allowable working temperature. The consistency and lubricating ability of grease are affected by working temperature. Imported bearings operating at a certain temperature must choose the correct consistency at the same temperature and A grease with good lubrication. Grease is manufactured in different operating temperature ranges and can be classified into low temperature (LT), medium temperature (MT) and high temperature (HT) greases. At the same time, there is a type of grease called EP (extrusion resistant) or EM (resistant to extrusion and added molybdenum disulfide), with additives to enhance the strength of the lubricant film.https://www.supplyforever.com/

General requirements for the selection of stamping die materials

     The materials for the stamping die are steel, hard alloy, steel-bonded hard alloy, zinc-based alloy, low-melting alloy, aluminum bronze, polymer material, and the like. At present, most of the materials used in the manufacture of stamping dies are mainly steel. The types of commonly used mold working parts are: carbon tool steel, low alloy tool steel, high carbon high chromium or medium chrome tool steel, medium carbon alloy steel, high speed. Steel, base steel and hard alloy, steel bonded carbide and so on.
Carbon tool steel
The carbon tool steel used in the mold is T8A, T10A, etc. The advantages are good processing performance and low price. However, the hardenability and the red hardness are poor, the heat treatment deformation is large, and the bearing capacity is low.
2. Low alloy tool steel
       Low-alloy tool steel is based on carbon tool steel with the right amount of alloying elements. Compared with the carbon tool steel, the quenching deformation and cracking tendency are reduced, the hardenability of the steel is improved, and the wear resistance is also good. The low alloy steel used for the production of the mold includes CrWMn, 9Mn2V, 7CrSiMnMoV (code CH-1), 6CrNiSiMnMoV (code GD) and the like.
3. High carbon high chromium tool steel
       Commonly used high-carbon high-chromium tool steels are Cr12 and Cr12MoV, Cr12Mo1V1 (code D2), which have good hardenability, hardenability and wear resistance, and have small heat treatment deformation, which is a high wear-resistant micro-deformed die steel. The ability is second only to high speed steel. However, the segregation of carbides is serious, and it is necessary to carry out repeated plucking (axial enthalpy, radial drawing) to forge to reduce the non-uniformity of carbides and improve the performance.
4. High carbon medium chromium tool steel
       High-carbon medium-chromium tool steels for molds include Cr4W2MoV, Cr6WV, Cr5MoV, etc., which have low chromium content, less eutectic carbides, uniform carbide distribution, small heat treatment deformation, good hardenability and dimensional stability. Sex. Performance is improved compared to high carbon high chromium steels where carbide segregation is relatively severe.

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