Sectional hob

A sectional hob comprising:

• a cylindrical hob body having an attachment seat formed on an outer periphery of the hob body and a recess formed on the outer periphery of the hob body so as to be adjacent to the attachment seat in a circumferential direction of the hob body, wherein the recess is positioned on a forward side in a rotation direction of the sectional hob with respect to the attachment seat;
• a single plate-shaped blade having a saw-toothed cutting edge, the plate-shaped blade being disposed in the attachment seat such that a direction of the cutting edge is parallel to a center axis direction of the hob body;
• a plurality of wedge members positioned in the recess so as to detachably-fix the plate-shaped blade disposed in the attachment seat to the hob body by pushing the plate-shaped blade onto a wall surface of the attachment seat that is facing forward in the rotation direction, the plurality of the wedge members being installed in the recess, wherein the plurality of the wedge members are disposed in a line in the center axis direction in the recess;
• and
• a plurality of clamp screws respectively fastened into first screw holes formed in the hob body through second screw holes formed in the wedge members;
• and
• an adjuster mounted on the hob body to adjust the position of the plate-shaped blade in the center axis direction, wherein
• the adjuster includes an annular plate-shaped plate having a screw hole formed therein and which is attached to one end of the hob body in the center axis direction, and an adjusting screw screwed into the screw hole, wherein
• the screw hole is communicated with the attachment seat in the hob body, and
• the blade is capable of being adjusted its position with respect to the hob body in the center axis direction by screwing the adjusting screw into the screw hole so as to directly press the blade disposed in the attachment seat.