Question
Download Solution PDFA file having 20 teeth (approximately) per 1 inch is generally termed as a ______ file.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
- The spacing of the teeth may be fine or coarse, depending on the finish required.
- These grades are applicable to single cut and double-cut files only.
- There are the following types of grades.
- Rough: It is used for rough work only, to remove metal quickly and has about 20 teeth per inch.
- Bastard: It is a common grade used for ordinary engineering work where the finish is not important and has about 30 teeth per inch.
- Second Cut: It is the common grade used to give good finish quickly and has about 40 teeth per inch.
- Smooth: It gives a good finish but is slow cutting. It has about 50 to 60 teeth per inch.
- Dead Smooth: It gives a very fine finish and is used for the final finish only. It has about 100 teeth per inch.
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