Rotary blade spacer for corrugated tubing cutter

摘要

A blade spacer for use in the cutting a length of corrugated tubing with a cutter of a variety including a rotary cutting blade rotatable circumferentially about the tubing within a plane defined by a radial axis of the blade. The spacer is mountable to the cutter coaxially with the axis of rotation of the blade for positioning the blade within a root portion of the tubing such that the radial axis of the blade is aligned within the root portion to define the plane as being generally equidistant from the side walls of the root portion and as being generally perpendicular to the central longitudinal axis of the tubing. The spacer is provided to invest the lateral surfaces of the blade centrally therewithin and as having a generally circular periphery extending radially outwardly from the axis of rotation of the blade to a bushing region. The bushing is configured to be received between the walls of the root portion of the tubing and terminates inwardly of the outer diameter of the blade to reveal at least a portion of the cutting edge thereof. The bushing region further is provided as having an outer surface which defines with the axial extent of the blade lateral surfaces an axial dimension which is selected relative to the root portion pitch such that the outer surface of the bushing region is made to bear upon the root portion walls effecting the desired positioning of the radial axis of the blade.