In the realm of CNC machining, achieving precision and consistency is of utmost importance. Producing accurately machined parts requires a profound comprehension of the factors that can influence the final product. In this technical article, we will delve into the critical significance of thermal expansion, deflection, and chatter in relation to the accuracy and consistency of machined parts. By understanding and effectively addressing these factors, CNC machining processes can yield high-quality components that adhere to the stringent demands of the aerospace, medical, and defense industries.