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Double row deep groove ball bearing lubricant selection importance  

2013-10-16 09:56:48|  分类: 默认分类 |  标签: |举报 |字号 订阅

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When the double row deep groove ball bearings must be carried out under harsh conditions , the choice of lubricants is essential. Lubrication can affect the double row deep groove ball bearings survive, torque, speed , noise, oil migration outlet temperature and SKF bearings rust.


Double row deep groove ball bearing lubricant type
There are two basic types of lubricants and greases .

Require very low torque and the torque variation range is narrow application is suitable for use oil lubrication. Depending on the application , this may be a lubricating oil can not meet the specific requirements. Oil is oil, thickener has been added.

Oil
Oil is double row deep groove ball bearings of the basic lubricant. Most previous lubricants are refined from petroleum . Today , however , synthetic oils such as diester , silicone polymers and fluorine-containing compound , it has been found to improve the performance .

With petroleum-based oils, esters generally have better temperature performance, low volatility, and better temperature and viscosity characteristics . Silicone and fluorine-containing compounds have lower volatility and wider temperature - viscosity properties.

Grease
Oil is oil, thickener has been added to prevent lubrication oil migration . It is used in lubricant added is undesirable or impossible situations frequently . All types can be mentioned here as fat oil base is added to the metal soap , fillers and thickeners synthesis.

Grease is almost entirely dependent on the performance of surgery on the base oil. In the case of other factors being equal , the use of grease instead of starting and running torque higher oil FAG bearings can limit the results to a lower speed.

Grease additives include rust inhibitors , extreme pressure additives (EP), oxidation and other things , because of its wide diversity and complexity , additives, greases similar characteristics change greatly from one manufacturer to another .

Essential oils and base oils
Mineral lubricating oil
Petroleum oil has excellent load capacity and good natural and corrosion , but only in the medium temperature range ( 25 to 250 ? F ) . This type of grease is recommended for use in a moderate temperature, from light to heavy loads and moderate to high speeds .

Super- refined petroleum lubricant
While these higher temperatures than oil lubricant ( 65-350 ? F available ) , they still exhibit the same excellent load carrying capability. This is further refined to remove unnecessary attributes , leaving only the desired chemical chains.

Synthetic lubricants
Esters, di-and poly-a-olefins is probably the most common synthetic lubricants. They do not have a finished film strength capabilities , but there is a wide range of temperatures ( 65-350 ? F ) and resistance to oxidation.

Synthetic hydrocarbons are found in the micro-NSK bearings industry because they have proven to be a variety of speed greater than the use of universal lubricant , temperature and environment.

Silicone Lubricant
Silicones are useful in a wide temperature range ( 100 to 400 ? F ) , but there is no bearer capability oil and other synthetic . It is in the instrumentation and miniature bearing industry to become accustomed to in recent years , reduction of the dynamic load rate (CR) TIMKEN bearings 1 /3 of the value if it is organic silicon products .

Perfluoropolyether (PFPE)
This widely used lubricants and greases stable at very high temperatures and / or corrosion resistance requirements. The specialty lubricants have excellent load-carrying capacity, but not angry that it is not compatible with the additives, impatience corrosion .

Lubrication
Wrapper around a quarter to a third of a double row deep groove ball bearing grease free volume is the most common method of lubrication . Volume can be controlled by a special lubricant for precision applications hundredth of a small part. In some cases, customers require 100% INA bearings grease . However, too much fat is too much a bearing grease as harmful . It makes cutting, heat build-up , unnecessarily high torque , and through continuous agitation , eventually leading to double row deep groove ball bearing failure worse. Oil lubricated bearings centrifugation to remove excess oil , leaving only a very thin surface. This method is used at very low torque bearings for critical applications specified by the customer .

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