Abstract: A sawtooth grinding machine has a single pivotally mounted grinding head for grinding both the face and back of teeth, such as in a circular saw blade. The grinding wheel is a composite member formed of a disk wheel and a cup wheel. The disk wheel is shaped to fit into narrow gaps between teeth when grinding the face of a tooth. The cup wheel has a smaller diameter than the disk wheel and has an abrasion-coated ring on its outer circumference for grinding the back of a tooth. A spindle shaft mounts the grinding wheel on the grinding head. The angular displacement of the grinding head for different grinding positions can be reduced as compared to known arrangements. The grinding head is supported for translatory movement in two directions extending perpendicularly of one another and also for rotation about two axes disposed at right angles to one another.

Abstract: The invention disclosed pertains to improved raker (high) and low teeth for use in circular saw blades. Each raker tooth includes a leading face and a top portion. The leading face comprises a first and second planar surface wherein the second surface extends at a negative angle from the first surface and to the top that consists of five facets in which two pairs of facets lie in planes offset at a first and second angles from the plane of a first center facet. Each low tooth also includes a leading face and top portion. However, the leading face includes a first planar surface and a second portion consisting of five facets each of which extends from the first surface to the top portion at a negative angle of inclination, and two pairs of facets lie in planes offset at first and second angles from a first center facet.

Abstract: The invention disclosed pertains to improved raker and low teeth for use in circular saw blades. Each raker tooth includes a leading face and a top portion. The leading face comprises a first and second planar surface wherein the second surface extends at a negative angle from the first surface and to the top that consists of five facets in which two pairs of facets lie in planes offset at a first and second angles from the plane of a first center facet. Each low tooth also includes a leading face and top portion. However, the leading face includes a first planar surface and a second portion consisting of five facets each of which extends from the first surface to the top portion at a negative angle of inclination, and two pairs of facets lie in planes offset at first and second angles from a first center facet.