Is widely used in automobile maintenance industry maintenance personnel common butter to grease the universal joint.
According to the relevant technical personnel's research is a kind of wrong.
Cross gimbal structure factors from the nozzle with grease gun is difficult to mix the butter filling on the needle roller bearing.
It is well known that the viscosity of the butter, when using grease gun from the nozzle to the universal joint cross shaft needle roller bearing inner cavity loaded with butter, butter into the oil duct stenosis lumen resistance increase, butter across the open pressure nozzle pressure reducing valve and overflow.
This phenomenon will be mistaken for driver and repair workers have filled up the butter.
In fact the butter didn't even enter the needle between.
Physical and chemical composition factors of butter itself have auto maintenance personnel to melt the butter into the cross cardan or lubrication part and make it reach the specified.
But due to the nature of the butter itself makes it short of effective lubrication.
This is due to the characteristics of ordinary butter.
Universal joint in the work to sustain large torque and alternating load, and calcium base grease oil film tenacity is poorer, the bearing and shaft friction surface is difficult to form a good oil film.
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.
According to the characteristics of such experts recommended gear oil lubrication.
This is both the cross cardan clean, add gear oil.
Through contrast experiment, the service life of the universal 10 bytes using ordinary butter is used for lubrication of two to three times.
Domestic also have the team use this way lubrication universal 10 bytes, effect is very obvious.
Because the gear oil embellish to special pressurized oil tools, and at the same time need to unload the cleaning for the first time.
More troublesome, and gear oil grease is better than the preservation of sex, its need to shorten the lubrication cycle.
So for cutting car universal transmission shaft after 10 bytes should use 2 # of extreme pressure lithium complex grease.
This is based on two points.
First, its liquidity is good, so easy to make it reach the lubrication part.
Second, good resistance to extreme pressure, it is suitable for the working state of universal 10 bytes.
And, in fact, cut on the car information on maintenance will be realistic in 2 # extreme pressure grease (
Models for NLGI2)
With 2 # extreme pressure lithium complex grease there should be a better effect.
Suggest something old universal 10 bytes of DX can test it.
Such as viscosity of 2 # slants big, still can use in 1 #.
Another: the car in addition to some parts of the proposal also USES 2 # of extreme pressure lithium complex grease.
One of the most typical is the steering linkage end lubrication.
Cutting car steering rod ball head is one of the parts.
But due to the particularity of this area structure, using ordinary butter will affect its service life.
This is a place that should use extreme pressure grease embellish.
So, as strongly recommend the use of 2 # extreme pressure lithium complex grease lubrication.