What should be used for lubricating the ways of a lathe and the gibs of a mill?

Using a lubricant from the central lubricating system is the best choice for lubricating the ways of a lathe and the gibs of a mill because this type of lubricant is specifically designed for machine tools. Central lubricating systems deliver the appropriate amount of lubricant directly to key components, ensuring consistent application and protection against wear and tear.

These lubricants often have properties tailored to provide optimal performance, such as viscosity that remains stable at varying temperatures, resistance to oxidation and corrosion, and the ability to create a film that protects surfaces under heavy loads. This targeted lubrication helps maintain the precision and longevity of the machine tool, contributing to smoother operation and reducing the risk of damage or malfunction.

In contrast, using options like motor oil or general-purpose spray lubricants may not provide the required protection and can lead to inadequate lubrication that could result in excess wear or mechanical failure. Similarly, grease from a gun might be too thick for certain components, potentially causing issues with movement and aligning. Each of these alternative lubricants lacks the specialized properties and application methods that dedicated lubricants in central systems provide, making them less suitable for ensuring the reliability and efficiency of high-precision machinery.