24) Which one of the following is NOT the reason for making file faces slightly convex in form ?
To increase the friction between the file face and the job surface.
Related Cutting Tools MCQ - Machinist(Set-1) with Answers
First cut
The grade of file tool is listed below
1. Rough
2. Bastard
3. Second Cut
4. Smooth
5. Dead Smooth
1) Rough File : A rough file is used for removing rapidly a larger quantity of metal. It is mostly used for trimming the rough edges of soft metal castings.
2) Bastard File: A bastard file is used in cases where there is a heavy reduction of material.
3) Second Cut File: A second cut file is used to give a good finish on metals. It is excellent to file hard metals. It is useful for bringing the jobs close to the finishing size.
4) Somooth File: A smooth file is used to remove small quantity of material and to give a good finish.
5) Dead Smooth File: A dead smooth file is used to bring the material to accurate size with a high degree of finish.
Wood
The rasp cut has individual, sharp, pointed teeth in a line, and is useful for filing wood, leather and other soft materials. These files are available only in half round shape.
