bastard file: meaning, definition, pronunciation and examples

Not within its proper technical context. It is a historical term for a grade of coarseness. However, due to the other meaning of the word, many modern tradespeople and manuals prefer terms like 'coarse single-cut file' to avoid potential misunderstanding.

Typically, after rough shaping with a bastard file, a worker would progress to a 'second-cut' file (medium) and finally a 'smooth' or 'dead-smooth' file for finishing.

While primarily for metal, a bastard file can be used on very hard woods for rough shaping. However, a wood rasp or surform tool is often more efficient and less likely to clog.

The term originates from an old classification system for files based on the spacing and arrangement of their teeth (cuts). 'Bastard' denoted an intermediate or coarse grade, not of standard fineness. Similar archaic classifications exist for other tools (e.g., 'bastard' saws or wrenches).

A single-cut metalworking file with a coarse-toothed surface cut at a diagonal angle, suitable for rough shaping and rapid material removal.

Bastard file is usually technical/professional, industrial in register.

Bastard file: in British English it is pronounced /ˈbɑːstəd faɪl/, and in American English it is pronounced /ˈbæstərd faɪl/. Tap the audio buttons above to hear it.