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At Van Peer Boat Works I cut 3/4 inch aluminum with circular carbide blades on occasion, and thinner gauges regularly, but never with the blades on backwards. Our circular carbide blades for aluminum were specialized. Every other tooth was narrow to relieve the curf for the following wider...

There was, at one time, maybe still, saw chain meant expressly for digging, trenching. When working for the phone company some home owners I brought service too dug their own trenches with such chain for the drops. When I first seen it I was amazed. That chain saved them having to hire a...