Elmeco Pignon Cog Vertical - pre 2014
Old version Z13 - prior to 2014
The main difference is that the older pignon cog has a slightly wider bore opening and smaller grooves on the inside where it joins to the vertical auger in comparison to the newer style.
This part is responsible for allowing the vertical auger to turn
Manufacturer Part Number: M0004104-001
Width: Upper Inner Hole 13.5mm (NOTE: New version after 2014 is 12.5mm)