Whether the design engineer chooses TBI ball screw for rolling ball screws or precision grinding ball screws, the lubricant factor must be fully considered. How to choose the correct lubricating oil for TBI ball screw? Choosing the appropriate lubricant can reduce friction, decrease friction torque, improve the efficiency of the screw, and extend its service life. The reason why TBI ball screw can maintain low friction advantage is achieved by using lubricants to reduce the rolling resistance between the ball and the raceway surface, as well as the sliding friction between adjacent balls. The selection of lubricants is often not taken seriously. Choosing the right lubricant based on specific applications can ensure that the ball screw reaches its design life. Both lubricating oil and grease can provide corrosion protection, but the specific choice of lubricant should be evaluated based on the advantages and disadvantages of each lubricant in a specific application, and a decision should be made after comprehensive consideration.
How can we minimize the wear and tear of TBI ball screws over time? That definitely requires the use of lubricating oil. As for how to correctly choose the lubricating oil for ball screws, there is still a lot of knowledge involved! Below, Shenzhen Jieyuan will analyze how to choose lubricating oil for TBI ball screw: When choosing lubricating oil for TBI ball screw, the following factors should be considered based on experience and data:
1、 Choose viscosity based on sliding speed and average pressure
When choosing to use guide rail lubricant, it should be based on the actual application of machine tool guide rail lubrication at home and abroad. You can also refer to the practical application examples of lubrication for mobile bed guide rails at home and abroad for selection.
2、 Lubricating oil that serves as both hydraulic medium and guide rail oil
According to the needs of different types of machine tool guides. It is necessary to meet both the requirements of the guide rail and the requirements of the hydraulic system. For machine tools such as coordinate boring machines, the viscosity of guide oil (50 ℃) should be chosen to be higher (4090mm2s). But like various grinders, the guide rail lubricating oil is often supplied by the hydraulic system, and the requirements of the hydraulic system are high and must be met. At this time, the viscosity of the guide rail hydraulic lubricating oil (50 ℃) should be selected to be lower (2040mm2s), which is the viscosity required by the hydraulic system.
When users choose oil lubrication, they can directly add lubricating oil to the position that needs lubrication at a certain flow rate. When the lubricating oil flows through the ball nut, it will remove the residual moisture and other pollutants inside the nut. Lubricating oil can also provide cooling effect. Simply put, if the ball screw is high-speed, it is lubricated with oil. However, if the ball screw is low-speed, grease lubrication is generally preferred. Various methods can be used to add lubricant to the ball screw pair and keep the lubricant inside the nut. For example, when using grease lubrication, lubricating grease is added to the nut through the grease injection holes on the nut body or nut flange. There are scraping blades or sealing rings at both ends of the nut to prevent grease overflow and external pollutants from entering the nut; When using oil lubrication, a lubrication device with a pump and filtration system is required, and the oil injection method should be considered.
