Wednesday, September 17, 2008

Fixing a Benjamin 312, Part 2

I figured out a strategy for dealing with the wallowed out hole in the pump tube.

Turning a 3/16" diameter pilot with a 3/32" shank for a interchangeable piloted counterbore.

The finished (I still had to turn the pip off the end) pilot.

Mounted in the counterbore. The counterbore is 5/16" diameter.

Counterboring the tube and plug with a hand drill.

On the left side I counterbored about 3/16" deep.

On the right side I went 1/4" deep so that the screw which normally holds the pivot pin would enter the counterbored section completely. The brass cut freely. Now to make a new pivot pin.

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