Instructables

Step 8: Drill Mortise

Picture of Drill Mortise
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With a 1/2" forstner bit loaded into the drill press, and the depth gauge stopped at the depth of the portafilter shaft, create the mortise by drilling several holes into the handle within the area that was marked in the previous step.

We wanted to be sure that I was drilling as close to perpendicular as possible into the handle.  Since the handle is a bit of an organic shaped object I checked my eye by using a level to square it up to the drill bit.  It's pretty easy to see when you're in the ballpark of square using this method.  
 
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