ZoSharp, LLC

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Mini Blades

Apr 20 2013

 

This week we received a challenge from Keith in Janesville. Both he and his wife work with very intricate items, and use some really neat little tools. As you can see from the picture above, this time it was a 2 inch miniature table saw blade. His wfe uses these in here shop to make quality crafted items.

The first thing we needed to do before sharpening, was to determine the hook angle of the teeth. With the help of a magnifier visor, and a very fine tipped Sharpie, the lines were drawn and the angle was measured. The same process use for sharpening the 10-12" circle saw blades is used when working with the smaller blades. The only difference is the size of the fixtures needed for the smaller ones. Both sides of the blade need to be supported as the thickness of the blade is very small, making them easy to bend or warp during the filing process. These also must be hand filed to keep from taking off a tooth during the sharpening process.

Working on these were really an adventure, as some of the means to measure the tooth settings needed to be done in unconventional ways.  As I mentioned the hook angle earlier, this is the actual cutting angle of the tooth, and is measured from the tip of the tooth to the center of the blade, then on a line firm the tooth tip to the side of the blade. Once this angle is calculated, then each tooth around the blade must receive the same angle to ensure a proper cut., as well as keeping the blade round. Once the angle is found the rest is easy. In this case all we needed to do was make sure we followed that angle with a needle taper file and make sure we took the same amount of material off each tooth around the blade.

If you have something that you think is not reusable due to size or unique angles give us a call and we will look things over for you. If we can help extend the usable life of a cutting tool, we are always happy to do so. 

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