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Cutter with bearing

A bearing cutter is a cutting tool that has a small free-running wheel on its body, technically called a guide bearing. The main function of this bearing is to act as a guide. When working, the bearing rests on the edge of the material or on a pre-prepared template and glides smoothly over it. As a result, the cutter blades maintain a constant distance from this guide edge, allowing very precise shapes, grooves or cuts to be created. A typical application is copying shapes from a template, where the bearing travels around the perimeter of the template and the cutter blades cut the workpiece material into exactly the same shape. Another common use is for trimming overlapping materials such as laminate panels or furniture edges. The bearing is guided over the already finished surface and the cutter aligns the overlapping edge flush with it. The bearing can be located either at the end of the cutter, i.e. at its tip, or at its shank, which is the part that clamps into the machine. This location determines whether the jig is placed below or above the material being machined. Essentially, the bearing acts as a built-in stop that simplifies the job because there is no need to rely solely on the machine's external guide rulers.

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