Special Files
Files are hand cutting tools used in fitting and machine workshops for removing small amounts of material and finishing metal surfaces. Apart from common files, several special files are designed for particular applications and shapes. These are known as special files.
Types of Special Files
- Pillar File
- Dreadnaught File
- Barrette File
- Warding File
Pillar File
A pillar file is a narrow rectangular file with parallel sides and safe edges. The cutting teeth are usually present on the flat surfaces while the edges remain smooth.
Description
- Thin rectangular cross-section.
- Safe edges without teeth.
- Parallel width and thickness.
Uses
- Finishing narrow slots.
- Working on keyways.
- Filing precision parts.
- Machining delicate surfaces.
Dreadnaught File
The dreadnaught file has curved and widely spaced teeth that remove large amounts of material quickly. It is designed for heavy-duty filing operations.
Description
- Large curved teeth.
- Strong and durable construction.
- Suitable for heavy material removal.
Uses
- Rough shaping of metals.
- Removing excess material quickly.
- Working on soft metals such as aluminium and copper.
Barrette File
A barrette file is triangular in cross-section with one flat face having teeth and the other surfaces smooth. The smooth surfaces prevent accidental cutting of adjacent surfaces.
Description
- Triangular cross-section.
- Single cutting face.
- Other faces are smooth or safe.
Uses
- Filing corners and angles.
- Precision finishing work.
- Working on narrow surfaces.
Warding File
A warding file is a thin flat file designed for working in narrow spaces such as key slots and locks.
Description
- Thin and flat design.
- Parallel sides.
- Available in different widths.
Uses
- Filing narrow slots.
- Locksmith work.
- Key fitting and shaping.
Conclusion
Special files are designed for specific applications in engineering and fitting workshops. Files such as pillar files, dreadnaught files, barrette files, and warding files help perform precise and specialized filing operations that cannot be achieved with ordinary files.