Tuesday, 9 October 2012

Shapes of File

Equalling

This rectangular file is intended for filing slots and interior corners; the wide, flat cutting surface also makes it ideal as a good general purpose file. All four surfaces are parallel, with double cut teeth on the top and bottom and single cut teeth down each side.

Flat

Another useful file; the flat file is similar to an equalling file, but tapers slightly towards the point. One of the sides is without teeth to act as a safety edge.

Pillar

The same shape as a flat file, except that both sides are toothless safety edges. The pillar file is available in a range of sizes.

Warding

The same as an equalling file; but with tapering sides, this makes it useful for filing narrower slots.

Square

Another tapered file, the square cross-section of this type has double cut teeth along all four sides. It can be used creating crease lines when forming right-angled folds, creating slots, or making round holes into square ones.

3 square (triangular)

The double cut sides of this file are tapered to a point, and can be used to create a 'V' shaped groove of 60°.

Round

The tapered shape of this file is useful for enlarging holes to a specific size. The cutting teeth are double cut.

½ round

The profile of this double cut file is semi-circular, with cutting teeth on both the curved and flat surfaces. This file is useful for filing around both interior and exterior curves.

Marking

The profile of this double cut file is semi-circular, without any cutting teeth on the flat safety side. The safety edge and tapered point makes this file a less risky tool to use when filing interior curves.

Crossing

The crossing file has two double cut curved surfaces, one surface having a greater radius than the other. This file is useful for a wide variety of curved edges and surfaces.

Barrette

Another tapered file, the barrette file has a single cutting edge. Because the safety edges are angled backwards, this file can get into small gaps without damaging adjoining metal surfaces.

Knife edge

This file has two cutting surfaces at an acute angle, with a narrow safety edge on the top. The double cut teeth allow rapid cutting of narrow slots and grooves.