Murtotapit

Murtotapit is a Finnish term that translates to "break tap" or "tap break." It refers to the act of deliberately breaking a tap tool, which is used to cut screw threads into a hole. This can happen due to several reasons, including improper use, poor quality tap, or hitting an obstruction within the workpiece. When a tap breaks, it often lodges itself firmly in the hole, making its removal difficult and time-consuming.

Removing a broken tap is a common challenge in machining and repair work. Various methods can be employed to extract a broken tap, depending on its size, how deeply it is embedded, and the material of the workpiece. Common techniques include using a tap extractor tool, which is designed to grip the broken shank and unscrew it. In some cases, specialized tools like electrical discharge machining (EDM) may be used for hardened taps or when other methods fail. Heat can also be applied to the workpiece to expand it slightly, potentially loosening the tap.

The consequences of a broken tap can range from minor inconvenience to significant damage to the workpiece. If the tap cannot be removed, the part may need to be scrapped or undergo extensive repair. Preventing tap breakage involves using the correct tap size and type, ensuring proper lubrication and cooling, using a tapping fluid, and applying consistent, controlled pressure. Recognizing the feel of the tap and stopping if resistance increases significantly are also crucial preventative measures. In industrial settings, automated tapping processes and advanced machinery often minimize the occurrence of such incidents.