What tool is used to remove burrs from the end of a 1/2" diameter steel pipe after cutting?

The tool used to remove burrs from the end of a 1/2" diameter steel pipe after cutting is a reamer. A reamer is specifically designed to smooth and enlarge existing holes, making it ideal for finishing the cut edges of a pipe. When a pipe is cut, sharp edges and burrs may remain that can cause problems during assembly or operation. The reamer helps to create a clean edge, preventing potential injuries and ensuring better fit and sealing in subsequent connections.

Using a reamer also improves the flow of fluids through the pipe by allowing for a smoother transition at the cut edge, thereby enhancing the overall efficiency of the piping system. This tool is particularly effective in plumbing and mechanical applications where precision and safety are paramount.

Other tools listed, such as a bit, are primarily used for drilling holes, and a tap is designed for cutting threads inside a hole. Grit does not refer to a tool but rather a type of abrasive material, which is not suitable for this application. Thus, the function and design of the reamer make it the most appropriate choice for burr removal after cutting a pipe.