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| Sawzall sounded like weapon of choice the I heard 20min. I get aggrivated at about 5min.
I would also keep a hose trickling in the cut instead of dipping. Try to stay ahead of the heat issue as it can take the temper out of your blade teeth.
Have you ever tried a thin 4.5” diamond blade on a angle grinder? Have no idea if it works on rubber but I can cut through ceramic tile like butter with one and the blades are fairly cheap. | |
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