Our plan is to build the body of the pump from 1 1/4" schedule 40 PVC pipe. This pipe has an approximate I.D. (Interior Diameter) of 1.25inch, and we've found that 1 1/4" dowel rod slips perfectly into it.
To cut the auger we will take a three step approach.
- A 1/4" deep groove will be cut using an angled fence on the table saw.
- Using an overarm pin router with a small pin running in the saw kerf from step one, we'll enlarge the groove to it's final width and depth. 1/2" of so.
- Next we'll switch the small pin for a 1/2" pin and offset it from the original alignment to enable us to add a second groove. This way the auger will move twice as much cheese per rotation!