Abstract: A device for grinding saw blades, both hand saws and circular saws so that a predetermined tooth profile is obtained, utilizes a grinding head that moves in one plane and moves the saw in a second plane. The device comprises a saw blade mount, an indexing system for indexing a saw tooth to move in a first plane, a grinding head to grind a saw tooth, a grinding head travel arrangement to move the grinding head in a second plane, the second plane being at an angle of about 35.degree. from the perpendicular of the first plane, and a control system for controlling movement of the saw blade in the first plane and the grinding head in the second plane to ensure a predetermined saw tooth profile is ground.

Abstract: An automatic saw chain grinder includes a saw chain support mounted for reciprocative movement on a support carriage. A spring urges the carriage in one direction to move a cutter tooth of a supported saw chain into a grinding wheel against the residual pressure of fluid in a first single-acting hydraulic cylinder. Pressurization of the cylinder moves the carriage in the opposite direction away from the grinding wheel. The grinding wheel is spring-biased toward an active, grinding position and moved away from such position by a second single-acting hydraulic cylinder. The first and second cylinders are sized and the respective springs of the carriage and grinder selected such that upon pressurization of the common hydraulic circuit for such cylinders, the carriage retracts the cutter tooth away from the grinding wheel before the grinding wheel retracts from the grinding position.