While going through my pile of treasures i came across this sticking out of a big puddle of roofing tar that had leaked out of a can on a shelf. I feel confident that it's a chain sharpening gauge that may have come with my Makita cordless chain sharpener. Any manual is long gone and looking at it I can't see how it's intended to be used.
There are two small pressed ears on the top with flat sides facing each other that I assume is to help locate a flat file for shortening rakers. They are on both sides of the opening that I assume the raker is intended to fit through. There is a bent ear that looks like it's intended to locate behind the raker that can be seen from the side between the letters "A" and "G" in "GAGE"
Now the mystery. There are 4 notches with .025, .030, .035, and .040 stamped next to the notches. The only thing is, measuring the depth of the .025 notch for example I find it measures .100" with each notch getting progressively deeper. There are three round notches that are the same as sharpening file diameters and then an open end wrench tool on the end that fits my Makita.
So, what is it and how do you use the notch gauges and the filing slot? As it is, filing along the top of the gauge would make the raker higher than the tooth. Wrong! There is no attachment for The Makita that would fit this tool.
View attachment 969979
View attachment 969980