Universal joint cross shaft needle bearing lubrication discussion

timer Asked: Feb 14th, 2014

Question description

AOBOTE bearing Limited Company is a professional agent and exporter of Skf Bearings Of China ,and a full range of other original world-famous brand bearings in Europe,U.S.A.,Japan and so on.AOBOTE bearing types include,Ball Bearing Series:Deep Groove Ball,Thrust Ball(Single Row Double-Directino/Doubel Row Single-Direction),Radial Ball,Self-aligning Ball,Filling Slot Ball,Counterbored Ball,Three/Four Point Contact Ball.Roller Bearing Series:Spherical Roller,Radial Roller,Cylindrical Roller,Tapered Roller,Needle Roller,Drawn Cup Needle Roller,Convex Roller,Concave Roller,Crossed Roller,Thrust Roller,Cylindrical Roller Thrust,Tapered Roller Thrust,Needle Roller Thrust,Spherical Thrust Roller.AOBOTE Bearing Seals Type and Row contain:RS,2RS,Z,2Z,2RZ,DDU,LLU,VV;Single-Row,Double-Row,Four-Row.AOBOTE Bearing Centry have following original brand:SKF,FAG,NSK,TIMKEN,NTN,NACHI,IKO,INA,KOYO,FYH and so on.They come from Swenden,Germany,France,Italy,Britain,Austria,Netherlands,Spain,Japan,India,Malaysia,Indonesia,Korea,China,Iran,Saudi Arabia,USA,Canada,Brazil,Mexico and other country in European/Asia and North America/South America.AOBOTE Bearing website provide Structure、Dimensions、Net Weight and all Parameter and Details of all kind of bearings.Today we will remark Universal joint cross shaft needle bearing lubrication.

Drive shaft universal joint cross shaft needle bearing should use gear oil lubrication. But generally found in vehicle maintenance and repair, the shaft of the universal joint cross shaft needle roller bearing is used calcium base grease lubricating (commonly known as butter), actually the lubrication method is wrong, lead to the early damage of large cross shaft needle roller bearing. Can see clearly in the disassembly cross shaft journal presents the squeezed middle pressure groove, journal and needle in seriously short of oil.

Why will appear this kind of phenomenon? Because of universal joint cross shaft needle bearing lubricating oil mouth is a common grease nipple, so to cause people an illusion, for a long time common filling butter to lubrication. In fact, from the nozzle with grease gun is difficult to mix the butter filling on the needle roller bearing.

When remove the maintenance, the force method is used to apply butter on a needle roller and shaft neck surface also can have some lubrication effect, but for the spider needle bearing lubrication effect, calcium base grease is much less than the gear oil well, the reason is:

A. in universal joint work to sustain large torsion and alternating load, and calcium base grease oil film tenacity is poorer, the bearing and the journal of the friction surface is difficult to form good oil film.

B. universal joint cross shaft turn needle roller bearing in the work can only be in situ, not along the steel bowl and cross axis neck rotation, and calcium base grease roll is very poor, so when the oil film can't immediately form new oil film was damaged.

C. calcium base grease is a mixture of calcium soap and lubricating oil, due to the deterioration of lubricating oil in use and evaporation, the grease into a hard calcium soap and calcium soap itself not only cannot have the lubrication effect, but also hindered the needle on the journal of rolling, with universal joint cross shaft and there is no discharge of oil measures, changed neither discharge grease, new oil and it is difficult to injection, thus greatly accelerate the universal joint cross shaft needle roller bearing wear.

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