The bastard file wasn't named for a person. This file is intermediate between fine and coarse, and at one time the term "bastard" was used to describe persons of "mixed race", so perhaps this suggested a file which was mixed. The etymology of the word "bastard" is obscure and the origin of the "bastard file" even more so.
A b*stard is not of "mixed race" it is having a child out of wedlock. It is referred to anything that is not a regular size (in this case neither fine nor coarse) as the dictionary says under båstard: "of abnormal or irregular shape or size; of unusual make or proportions:
b*stard quartz; b*stard mahogany."
About 150 years ago.
Yes, it is very rough.
There are different 'cuts' of file from the very fine 'arborite ' file up to the 'bastard' file.
A Half Round Bastard File is a tool designed for use on concave, convex and flat surfaces.
This is a file, commonly a rasp, but it could be a mill file or a bastard file, that is rounded on one side and flat on the other side.
A mill bastard is a type of wood file. +++ It's simply "bastard" as a mill-file, sometimes millenicut, is a different grade of cut. They are designed to cut metals rather than wood. Use a rasp on wood.
It is a tool used by engineers, mechanics and fitters for smoothing the surface of metal. Not as coarse as a rough file and more so than a smooth file.
there are lots of files: The rat tail file-to round off objects The bastard file-to file larger objects half round file 3 sided file 4 sided file
By using a file card. That is a wire brush with short, fine wire bristles that can clean materials from the grooves on the file.
When files are initially forged at the mill, coarse and smooth files will occasionally intermingle resulting in a consummation not approved by the shop foreman. The result is a little fella that is neither βCoarseβ nor βSmooth.β Given their untoward metallurgical status, they are labeled Bast@rd files and discounted appropriately.
They are types of file, the hand tool for shaping metal.
No, a bastard child is one born outside of marriage. Generally obsolete language now, except when used in a derogatory sense. In this case it would mean a person of low moral standards - probably originating from the original sense of having no proper (married) parents. Alternately the term can be used as the identification of an awkward or unusual object. Often it is applied to tools that are not of standard size or configuration ( a bastard file: a file whose teeth configuration is in between a rough or coarse file and a 'second cut' file, a bastard sword: a sword which has no legitimate claim to being classified as either a single-handed or two-handed weapon). This could also be applied to a person.