What type of lubricant is best suited for linear rails in a high-temperature FDM printer?

For linear rails in a high-temperature FDM (Fused Deposition Modeling) printer, a high-temperature synthetic grease is best suited. Linear rails are crucial components that enable smooth and precise movement of the print head. In high-temperature environments, such as those found in printers processing materials like ABS, polycarbonate, or nylon, conventional lubricants can break down, losing their viscosity and lubricating properties. High-temperature synthetic greases are specifically formulated to withstand these elevated temperatures without degrading or carbonizing. These greases typically have a wide operating temperature range, good oxidation stability, and the ability to maintain their lubricating properties over extended periods. Silicone-based greases or those containing PTFE (Teflon) are often used because of their high-temperature resistance and compatibility with various materials. Using an inappropriate lubricant can lead to increased friction, wear, and ultimately, failure of the linear rails, resulting in print inaccuracies and printer downtime.