The key considerations for selecting ball screws for CNC vertical lathes mainly include the following aspects:

1. Accuracy retention: As an important transmission component of CNC machine tools, CNC vertical lathe ball screws need to have the ability to maintain original accuracy for a long time. This means that the wear of CNC vertical lathe ball screws should be minimized to prevent loss of accuracy. Therefore, when selecting ball screws, it is necessary to consider their accuracy level and ability to maintain accuracy.

2. Rigidity: CNC vertical lathe ball screws need to bear a lot of loads, so they must have good rigidity. This not only helps to maintain accuracy under load, but also helps to make correct considerations in the structure and material selection of the screw.

3. Guidance: Good guidance of CNC vertical lathes includes the linearity of moving parts and the smoothness of circular motion. This directly affects the transmission accuracy and smoothness of movement of CNC machine tools. Therefore, the guidance of ball screws is also an important factor to consider when selecting.

In addition, there are some other factors that need to be considered:

1. Load: Determine the maximum static and dynamic loads that the CNC vertical lathe needs to bear to determine the rated load capacity of the ball screw. 2. Stroke: Determine the length of the stroke required for the CNC vertical lathe, and select the effective stroke of the ball screw according to the stroke length.

3. Return clearance: Determine the required return clearance, that is, the gap when the ball screw moves in the reverse direction.

4. Drive mode: The CNC vertical lathe selects the ball screw according to the required drive mode, which can be manual drive, electric drive or hydraulic drive, etc.

5. Environmental conditions: Consider the special conditions of the ball screw working environment, such as high temperature, humidity, corrosive media, etc. Select suitable ball screw materials and lubrication methods according to environmental conditions.

6. Cost and reliability: Select the appropriate ball screw according to budget and reliability requirements.

When selecting a ball screw, you also need to pay attention to the following points:

1. Lubrication of the ball screw: The CNC vertical lathe uses appropriate grease and lubricating oil for lubrication to reduce wear and friction and increase service life.

2. Protection of the ball screw: Once dust or impurities are mixed into the CNC vertical lathe ball screw, it will directly affect its service life. Therefore, protective measures such as screw seals are required to prevent stolen goods from entering the ball screw.

3. Installation of ball screw: When installing the CNC vertical lathe, special attention should be paid to the parallelism between the axis of the screw and the moving track of the nut seat, and the parallel state should be maintained to avoid loss of accuracy and shortened life due to improper installation.

In short, the key to selecting ball screws for CNC vertical lathes is to comprehensively consider their accuracy, rigidity, guidance and other related factors, and select suitable models and specifications to ensure high precision, high efficiency and high reliability of CNC machine tools.