Uraruuvinvääntimet

Uraruuvinvääntimet, often referred to as reamers in English, are a type of cutting tool used to enlarge or finish an existing hole to a precise size. They are characterized by their ability to produce a smooth, accurate, and clean surface finish within the bore. Uraruuvinvääntimet are typically used as a finishing operation after drilling or boring, to achieve the desired diameter and geometrical accuracy.

The cutting edges of a uraruuvinvääntimet are generally straight or helical, and they remove a small amount of material. This makes them ideal for improving the tolerance of a hole, rather than creating a hole from solid material. The cutting edges are usually ground with a slight chamfer or lead angle to facilitate entry into the hole and to prevent chipping.

Uraruuvinvääntimet come in various forms, including hand reamers and machine reamers. Hand reamers are designed to be turned by a wrench or tap handle, while machine reamers are intended for use in drilling machines, milling machines, or lathes. They are available in a wide range of materials, such as high-speed steel (HSS), carbide, and even diamond-coated for extremely hard materials. The selection of a uraruuvinväännin depends on factors like the material being reamed, the required accuracy, and the production volume. Proper lubrication and cutting speed are crucial for achieving optimal results and tool longevity.