Cutting insert and holder

Details Cutting insert and holder Cutting insert and holder

B - Operations, Transporting

23

B

77/33

B23B 51/00 (2006.01) B23B 27/06 (2006.01) B23B 27/22 (2006.01)

Patent

CA 1104846

TITLE OF THE INVENTION CUTTING INSERT AND HOLDER ABSTRACT OF THE DISCLOSURE An improved indexable cutting insert and tool holder for threading operations comprises an insert having end wall regions and parallel sides and parallel top and bottom walls perpendicular to said sides. The insert is invertable about the axis perpendicular to its sides and is adapted for mounting in the pocket of a tool holder with one end region exposed. A recess is formed in at least one of the top and bottom walls along the outer edges with an outer region forming cutting edges at its juncture with the end wall region. The recess also has an inner region in the form of an abrupt rise leading from the lowermost part of the outer region upwardly to the plane of the top or bottom wall. The cutting edges are angled so that when the insert is placed in a negative rake holder the cutting edges can be presented at zero or positive rake to the workpiece.

328890

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