Which type of rotary file has the longest cutting life?

Carbide rotary files are designed for prolonged use and superior cutting efficiency, which contributes to their longer service life compared to other options. The remarkable hardness of carbide allows these tools to maintain their cutting edges over extended periods, even when used on tougher materials. This durability means they can operate at higher speeds and resist wear and tear, reducing the frequency of replacements.

In contrast, while steel rotary files are effective, they tend to dull more quickly and are less suited for heavy-duty use. Abrasive files, although useful for specific applications, wear down rapidly as they erode with use, limiting their longevity. Ceramic files also offer durability but generally do not match the cutting efficiency and life expectancy of carbide in most woodworking contexts. Therefore, carbide stands out as the option that provides the longest cutting life.