Flexible files, also known as ‘pansars’ or ‘panzers’ are manufactured as tangless rectangular strips with a hole drilled through each end.
While it is possible to get some limited use out of them just as they come, they are usually attached to flexible file handles by means of the holes mentioned above.
What are the characteristics of flexible files?
Cross section, profile and cut
Flexible files are blunt, and have a rectangular cross section. The type of cut depends on its intended use.
Millenicut and vixen teeth are designed mainly for working on car bodies thanks to their resistance to clogging.
Rasp and double cut file teeth are mainly used to shape and sharpen long objects with a large surface area such as skis.
Handles
The handle can push the files into a concave or convex shape using an adjuster mounted in the middle of the tool. This allows you to shape the file to the contour of your workpiece.
This is possible thanks to flexible files being made from a different material to normal files. Rather than tool steel, flexible files are made from spring steel.
Flexible files are used in situations where holding a file’s handle would prevent you from being able to hold it flat against the surface of a workpiece.
For example, if you wanted to use a file to smooth out the centre of a car bonnet, there are not many files that would be able to reach from the edge.
Length
Flexible files are usually available in lengths from 300mm (12 inches) to 350mm (14 inches).
Swiss or American?
Flexible file coarseness can be described using the Swiss pattern system, the American pattern system, or teeth per inch.
How do you use a flexible file?
Flexible files should be used in the same way as their non-flexible cousins; they cut on the forward (push) stroke with light pressure.
The contour of the file helps to keep it in contact with the surface you are working on as you push it forward.