AUTOMATIC KNIFE SHARPENER

A chain mortiser is a tool designed to cut square holes into a piece of wood, often to create mortise and tenon joints or post and beam fittings. Like other mortisers, the chain mortiser is designed to cut material in a square shape, which drill bits often cannot do. Unlike other mortisers, however, the chain machines can remove a significant amount of material very quickly, and the chain itself can be plunged quite deeply into the wood to create deeper cuts. The chain runs around a bar, much like the design of a chainsaw, but usually on a much smaller scale.