Sole Sacrifice

(Santana)

Cutting the pins on the sole plates was probably hardest machining I’ve ever done. I’m just not good at holding holding tolerances in so many planes.

sole1When we last left our intrepid hero, the side plates had tails. Boy, was that easy. The sole started out as a 4 1/2” x 1” x 1/4” piece of hot rolled steel (because I didn’t have any plate). The “wings” were cut to fit between the middle tails. That indexed the side plate so it could be used to mark the pin locations.

  Then to the mill, where many an agonizing hour was spent twirling levers, rotating the vise back and forth, checking fit, trimming, ad nauseum and in general really wishing for a CNC mill. Worse, getting one side done is the easy part, on the other side, I have to get the depth so that the inside of the sole is 1/4” wide. One thing I totally missing when making the drawing is that the 1/4” gap at the top of the right most pins is really tight to cut with a 1/4” endmill. Which I had to use after I smoked my 3/16” bit.

But the parts got made and are tight.
Next up: cut the mouth and blade ramp.
Note: the red stuff isn’t blood but red layout fluid (Dykem Steel Red). Wonderful stuff but don’t breath it if you value your brain cells. The other thing that saved my bacon was a Bausch & Lomb Magna Visor Magnifying Visor. It sucks getting old.
Yes, one of the tail/pin sizes is different between A & B. I can do that.
One neat trick to to geting really close to a surface but not cut it is to use a Sharpie to color the surface. The end mill will remove the Sharpie ink just before it starts removing metal.

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