While taper saw and double ended saw files are ideal for sharpening saws with teeth angled at 60°, saws with other angles between their teeth need to be sharpened with different files, such as cant saw and web saw files.
Cant saw files are designed to sharpen saws with teeth at an angle of less than 60°, including saws with ‘M’ shaped teeth.
Web saw files are used to sharpen the rotary saw blades found in a web saw, which is how they earned their name.
What is a cant saw?
There is actually no such thing as a cant saw! The cant saw file is so named because it is a saw file with edges that cant, or slope.
What is a web saw?
A web saw is a machine that allows circular saw blades to be set up at specific angles so that they will cut the edges of a piece of timber to a specific shape.
The most prominent use for web saws is cutting wooden rafters for use in roofing.
What are the characteristics of cant saw and web saw files?
Cross section
Cant saw files have a triangular cross section with one side longer than the other two.
This type of triangle is called an isosceles triangle.
The shape of a cant saw file means it will fit perfectly into M-shaped saw teeth. The narrow edges of the file are able to reach into the gaps between extremely fine saw teeth. This has earned them the name feather edge files, as these fine saws resemble the edge of a feather!
Web saw files have a diamond-shaped cross section, similar to two cant saw files with their flat faces aligned.
The angles of the narrow edges on a web saw file are around double the size of the narrow edges on a cant saw file. This suits them to sharpening saws with slightly wider teeth.
Profile
Cant saw files can be blunt or tapered.
Web saw files are blunt in profile.
Cut
Both files are single cut on all faces.
Size
Cant saw files are usually available in lengths between 200mm (8 inches) and 250mm (10 inches)
Web saw files tend to be smaller, and are usually available at lengths of 150mm (6 inches)
Swiss or American?
Cant saw and web saw files are both American pattern files.