FINE-ADJUSTABLE GROOVING CUTTER

PURPOSE:To provide a grooving cutter for cutting a groove in the bore of a hole with possibility of fine adjustment by equipping a cutter shaft installed eccentric to the drive shaft and a cutter to be fitted on this cutter shaft separably with respective specified numbers of grooves, and by connecting the two by a pin. CONSTITUTION:A cutter 3 is fitted separably on a cutter shaft 2, which is installed eccentric to the drive shaft 1. At the fit surface with the cutter shaft 2, the cutter 3 is provided with spline 4 in the axial direction by dividing the circumference into eleven equally, while five grooves 5 are formed in the periphery of said cutter shaft 2 in the axial direction at a constant pitche. A key- shaped roll pin 6 is inserted in these two 4, 5 in their positions in which the spline 4 and groove 5 face each other, and the cutter 3 is fastened by a bolt 7. If the number of grooves 5 is represented by N in this arrangement, a fine adjustement of 1/N as much as that of any conventional grooving cutter can be obtained.