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Reliability is About Two Things! Competence and Skills in the Era of Industry 4. The Three Mistakes of Bearing Lubrication. Over lubrication raises the temperature inside the bearing.
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Movie list. TOC of Basic Bearing Knowledge Front Page of Basic Bearing Knowledge Outline of bearing selection Selection of bearing type Selection of bearing arrangement Selection of bearing dimentions Bearing service life Calculation of service life Calculation of loads Dynamic equivalent load Basic static load rating and static equivalent load Allowable axial load for cylindrical roller bearings Applied calculation examples Boundary dimensions and bearing numbers Boundary dimensions Dimensions of snap ring grooves and locating snap rings Bearing number Bearing tolerances Tolerances and tolerance classes for bearings Tolerance measuring method Limiting speed Limiting speed Correction of limiting speed Limiting speed for sealed ball bearings Considerations for high speed Frictional coefficient refer.
Purpose and method of lubrication. Functions of lubrication : To lubricate each part of the bearing, and to reduce friction and wear To carry away heat generated inside bearing due to friction and other causes To cover rolling contact surface with the proper oil film in order to prolong bearing fatigue life To prevent corrosion and contamination by dirt Bearing lubrication is classified broadly into two categories: grease lubrication and oil lubrication.
Still having trouble. Inquiries by phone Inquiries by e-mail. Product information. List of product types. Technical information. Global Network. All Rights Reserved. Although greases often provide much greater resistance than oils, many modern low torque greases can produce torque figures that are similar to some oils, particularly where a low grease fill is used.
Most oils maintain their consistency well over a wide temperature range and are easy to apply. For very low torque applications, a light instrument oil should be specified. Higher running speeds are possible with oil but, as it tends not to stay in place, continuous lubrication must be applied by oil jet, oil bath or oil mist unless speeds are low or rotation is for short periods.
An oil-impregnated phenolic retainer or a synthetic retainer made from a material with a very low coefficient of friction such as Torlon do not need continuous external lubrication. These types of retainer are often used in high speed, low torque dental bearings. Greases are simply oils mixed with a thickener to so that they stay inside the bearing. Greases are generally more suitable for heavy loads and have the obvious advantage of giving constant lubrication over a long period without maintenance.
Surprisingly, too much grease can be bad for a bearing. A high grease fill will mean greater rolling resistance higher torque which may not be suitable for many applications but worse still is the risk of heat build-up.
The free space inside a bearing is important in allowing the heat to radiate away from contact area between balls and raceway. As a result, too much grease can lead to premature failure unless speeds are low. LDTS 1. Food grade dry film lubricant. LMCG 1. Grid and gear coupling grease. LGTE 2. Biodegradable grease for total loss applications. LGLS 0. Wide temperature lubrication systems grease.
LGLS 2. High viscosity lubrication systems grease. LHMT Medium temperature chain oil. LHHT High temperature chain oil.
LUB Biodegradable lubricating oil for metal machining. Find a distributor Have more questions? Ready to buy? Your local SKF distributor can help with technical, sales, and product support. Discover the complete SKF portfolio.
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