Final answer:
The function of a pilot or bearing on a router bit is to guide the bit along a specific path when cutting into a material, ensuring precise and accurate cuts.
Step-by-step explanation:
The function of a pilot or bearing on a router bit is to guide the bit along a specific path when cutting into a material. It acts as a reference point, ensuring precise and accurate cuts. When the pilot or bearing of the router bit is in contact with the material, it prevents the bit from veering off course.