Small CNC vertical lathes maintain good accuracy and have fast cutting speeds, which are very important for efficient machining. Some common reasons for good accuracy and cutting speed in small CNC vertical lathes include:

1. High-quality machine tools: The quality of machine tools is crucial to ensuring accuracy. High-quality CNC vertical lathes usually use high-quality materials and structural design to provide a stable working platform.

2. Precision guide rails and screws: The use of precision guide rails and screws helps ensure the smoothness and accuracy of the machine tool in motion. This prevents errors caused by friction and looseness.

3. Advanced CNC system: The advanced CNC system can provide high-precision motion control and cutting path planning. This helps maintain processing accuracy.

4. High-quality tools and tool grinding: Using high-quality tools and performing regular tool grinding and replacement help ensure the stability of the cutting process and the quality of the cutting surface.

5. Appropriate processing parameters: Good cutting speed usually requires appropriate processing parameter settings, including feed speed, cutting depth, etc. The adaptable CNC system can automatically adjust these parameters under different working conditions.

6. Temperature control: Ensure the temperature of the machine tool and working environment is stable to reduce the impact of temperature changes on accuracy.

7. Maintenance and maintenance: Regular machine tool maintenance and upkeep is an important part of maintaining machine tool performance. This includes cleaning, lubrication, tightening bolts, etc.

If you have any further questions or need more detailed information about CNC vertical lathes, cutting technology, etc., please feel free to ask.