How was a rasp made?

Answer 1

A rasp is typically made by taking a metal bar and creating a series of small, sharp teeth on its surface through a process called "cutting" or "punching." The teeth can be formed using specialized tools that create grooves or indentations, giving the rasp its distinctive texture for shaping and smoothing materials like wood or metal. After the teeth are formed, the rasp is often heat-treated for durability and then finished to ensure a comfortable grip. Finally, it may undergo additional processes such as coating to prevent rust.