Ball screws need to be amply lubricated unfailingly. If the lubrication is not sufficient, both the metalic planes will rub against one another in course of time which will result in friction, which in turn will give rise to decrease in working life of the ball screws. Ball screw lubricants are classified in two kinds, viz. oil and grease. Many times, when it is associated with maintenance, ceaseless administration of grease gives rise to linear elevation in dynamic friction torque apart from rising rotating momentum, hence applying oil is thought to be better alternative when pace is greater than three to five m/min. But it should be thought upon that examples exist of appliction of grease being able to render momentum of ten m/min, when equipment is in question.
Yet another big injurious thing for the ball screw is any foreign substance or water. These increase friction and weaken the life span of ball screw. It is dependent on the environment in which the ball screws are used. The objects floating in that environment can get inside ball screws effortlessly, which needs to be prohibited if we wish to maintain their smooth working. In such an atmosphere, the shaft needs to be covered totally, so as to forbid the entry of foreign items.
Offset load means a condition which directly affects life of ball screw. The formation of ball screws is in such a way that the diameter of the screw is proportional directly to the load it will withstand. If accuracy is not applied in this, difficulty of offset loading may occur. This can be identified by experiencing with hand as well as noise. If we feel the equipment, we can experience its rough working, in addition to rough noise. When you come across these signs, you must unload running at once. You must even stay away from operating immediately after assembling. Various levels of offset load are witnessed and they are related to poor accuracy at the time of assembling.
The major reason for making use of ball screw is the decreased friction it offers. Minimum friction of ball screw imparts more competence as compared to lead screws and other alternatives. A typical ball screw provides ninety percent accuracy in comparison with the 50 percent precsion of lead screw of similar size. Nonexistence of friction increases life of ball screw assembly and decreases downtime for maintenance and lessens necessity for lubrication. Due to this, the general service and less power want can outdo the preliminary price of ball screws. Therefore if we be careful about the screws we get the essential advntages of its application.