In automotive and fabrication shops, technicians use machinist hand files with specific cross-sectional profiles to shape different workpiece geometries. Match each file shape with its intended workshop application.
- Triangular (three-square) fileFiling internal 60-degree angles, cleaning acute corners, and sharpening saw teeth
- Round (rat-tail) fileEnlarging circular openings, smoothing concave radii, and finishing curved slots
- Square fileTruing rectangular keyways, machining square holes, and filing 90-degree internal slots
- Mill (flat) fileProducing smooth, flat exterior surfaces, draw-filing edges, and general lathe finishing
Answer
Triangular (three-square) file pairs with filing internal 60-degree angles and sharpening saw teeth; Round (rat-tail) file pairs with enlarging circular openings and finishing concave radii; Square file pairs with truing rectangular keyways and 90-degree internal slots; Mill (flat) file pairs with producing smooth flat surfaces and draw-filing edges.
Each hand file profile is engineered for specific surface geometry: the triangular (three-square) file fits 60-degree angles and saw gullets; the round (rat-tail) file finishes round holes and internal curves; the square file sizes 90-degree keyways and rectangular channels; and the mill (flat) file provides uniform flat stock leveling and smooth draw-filing.
Step-by-Step Solution
Key Concept
Hand file cross-sectional profiles and geometry-specific applications in shop metalworking
Estimated Time:1m 0s