Lathe barrel and action fixture

AMV

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Spent the last few hot evening in the cool basement machining an action fixture. Copied partly form a well known design. Instead of holding the fixture in a four jaw chuck I mounted it directly to a 4“ threaded backing plate, keeps parts closer to head stock and easy on and off. Fixture started as a 4”x8” solid round stock. Still a little ways to go did not think to start a thread on it until now.... more photos to follow
 

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For a full size rifle barrel I would probably run barrel though head stock an support the back end with a cat head, but for receiver, bolt blueprinting or pistol barrel threading this would be better. Same style jig as below but instead of mounting in four jaw it is directly on chuck back plate, the same plate that would hold a similar lathe chuck. The fixture will be 7 OAL pus back plate
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Another rainy day, bar stock was mounted in four jaw and machined for press fit on the backing plate, at the same time it was drilled and bored about halfway down. Drilled and bored the other end last night to 1.5” ID. Now to make some brass tipped set screws
 

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