Pump Fabrication and Assembly
Overview
Creating the Impeller Model
Fabrication and Assembly of the Pump Body
Download the slide deck with instructions on fabricating
the pump
Main fabrication steps
Use milling machine to create the cavity for the impeller
Using milling machine and hand drills to fabricate the lid
Drill pilot holes in the pump body
Drill clearance holes in the pump lid
Tap pipe threads into the side of the pump body and the lid
Drill out the ID of the impeller –BE CAREFUL to use a bit slightly smaller than the motor shaft diameter
Main assembly steps
Press the motor bushing into the pump body – Test that motor fits
Insert barbed fittings with teflon tape on the threads
Insert motor into the pump body and secure it with zip ties – Test that motor spins freely
Add a drop of oil to the inner (small) O-ring on the motor bushing
Press the impeller on to the motor shaft (after the motor is secured with zip ties)
Install the lid
Test that the motor spins the impeller and that the impeller does not slip when applying a slight resistance with your thumb
Insert the large O-ring
Use self-tapping screws to secure the pump lid – Test again that the impeller can spin freely