Both sides of a flat bastard file have double cut teeth.
36) Both sides of a flat bastard file have
Double cut teeth
Related Cutting Tools MCQ - Machinist(Set-1) with Answers
Centre of one pin hole to the centre of other pin hole
Length of hacksaw blade is measured from Centre of one pin hole to the centre of other pin hole.
The space is not enough to run the blade
Protect the adjacent sides
Safe edge of a file tool is one which is not having any teeth's cut on it.
Cleaning the file teeth
During filing, sometimes the metal chips (filings) will clog between the teeth of files. This is known as ‘pinning’ of files.
Files which are pinned will produce scratches on the surface being filed, and also will not bite well. Pinning of the files is removed by using a file brush also called a file card, with either forward or backward stroke.