Which machining tool is known for lacking a cutting point but serves to smooth holes?

The machining tool known for lacking a cutting point and serving to smooth holes is the reamer. A reamer is specifically designed to enlarge and refine the diameter of a hole, improving its accuracy and surface finish. Unlike a conventional drill, which creates holes, a reamer operates in an existing hole and its cutting edges are especially designed to remove small amounts of material to enhance the hole's precision.

Reamers do not have a single cutting point like drills do; instead, they feature multiple cutting edges that engage the material as the tool is rotated and fed into the hole. This design allows for a smoother finish and tighter tolerances, resulting in an improved fit for components that require precision.

This characteristic of lacking a cutting point and the function of smoothing and finishing holes distinctly define the role of a reamer in machining processes, differentiating it from other tools like drills, lathes, or milling cutters, which have different primary functions and cutting designs.